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Facchini and Rolf Sander and welcome to Barbara Ervens as executive editor of ACP</a> </div> <div class="dropdown-item level-3 " style="list-style: none"> <a target="_parent" class="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2020-08-28_first-acp-letter-published.html">First ACP Letter: The value of remote marine aerosol measurements for constraining radiative forcing uncertainty</a> </div> <div class="dropdown-item level-3 " style="list-style: none"> <a target="_parent" class="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2021-01-14_atmospheric-evolution-of-emissions-from-a-boreal-forest-fire-the-formation-of-highly-functionalized-oxygen-nitrogen-and-sulfur-containing-organic-compounds.html">Atmospheric evolution of emissions from a boreal forest fire: the formation of highly functionalized oxygen-, nitrogen-, and sulfur-containing organic compounds</a> </div> <div class="dropdown-item level-3 " style="list-style: none"> <a target="_parent" class="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2021-04-25_observing-the-timescales-of-aerosol-cloud-interactions-in-snapshot-satellite-images.html">Observing the timescales of aerosol鈥揷loud interactions in snapshot satellite images</a> </div> <div class="dropdown-item level-3 " style="list-style: none"> <a target="_parent" class="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2021-10-15_new-acp-letter-how-alkaline-compounds-control-atmospheric-aerosol-particle-acidity.html">New ACP Letter: How alkaline compounds control atmospheric aerosol particle acidity</a> </div> <div class="dropdown-item level-3 " style="list-style: none"> <a target="_parent" class="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2021-11-16_changes-in-biomass-burning-wetland-extent-or-agriculture-drive-atmospheric-nh3-trends-in-select-african-regions.html">Changes in biomass burning, 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} #templateSearchResultTerm { font-weight: bold; } #resultsSearchHeader { display: block !important; } #scrolltopmodal { font-size: 3.0em; margin-top: 0 !important; margin-right: 15px; } @-webkit-keyframes animation_dots_breath { 50% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; } 100% { opacity: 0; } } @keyframes animation_dots_breath { 50% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; } 100% { opacity: 0; } } @media (min-width: 768px) and (max-width: 991px) { #templateSearchResultModal .modal-dialog { max-width: 90%; } } </style> <script> if(document.querySelector('meta[name="global_moBaseURL"]').content == "https://meetingorganizer.copernicus.org/") FINDER_URL = document.querySelector('meta[name="global_moBaseURL"]').content.replace('meetingorganizer', 'finder-app')+"search/library.php"; else FINDER_URL = document.querySelector('meta[name="global_moBaseURL"]').content.replace('meetingorganizer', 'finder')+"search/library.php"; SEARCH_INPUT = document.getElementById('search_query_solr'); SEARCH_INPUT_MODAL = document.getElementById('search_query_modal'); searchRunning = false; offset = 20; INITIAL_OFFSET = 20; var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver; const targetNodeSearchModal = document.getElementById("templateSearchResultModal"); const configSearchModal = { attributes: true, childList: true, subtree: true }; // Callback function to execute when mutations are observed const callbackSearchModal = (mutationList, observer) => { for (const mutation of mutationList) { if (mutation.type === "childList") { // console.log("A child node has been added or removed."); picturesGallery(); } else if (mutation.type === "attributes") { // console.log(`The ${mutation.attributeName} attribute was modified.`); } } }; // Create an observer instance linked to the callback function const observer = new MutationObserver(callbackSearchModal); // Start observing the target node for configured mutations observer.observe(targetNodeSearchModal, configSearchModal); function _addEventListener() { document.getElementById('search_query_solr').addEventListener('keypress', (e) => { if (e.key === 'Enter') _runSearch(); }); document.getElementById('start_site_search_solr').addEventListener('click', (e) => { _runSearch(); e.stopPropagation(); e.stopImmediatePropagation(); return false; }); $('#templateSearchResultModal').scroll(function() { if ($(this).scrollTop()) { $('#scrolltopmodal:hidden').stop(true, true).fadeIn().css("display","inline-block"); } else { $('#scrolltopmodal').stop(true, true).fadeOut(); } }); } function scrollModalTop() { $('#templateSearchResultModal').animate({ scrollTop: 0 }, 'slow'); // $('#templateSearchResultModal').scrollTop(0); } function picturesGallery() { $('body').off('click', '.paperlist-avatar img'); $('body').off('click', '#templateSearchResultContainer .paperlist-avatar img'); searchPaperListAvatar = []; searchPaperListAvatarThumb = []; search_pswpElement = document.querySelectorAll('.pswp')[0]; if (typeof search_gallery != "undefined") { search_gallery = null; } $('body').on('click', '#templateSearchResultContainer .paperlist-avatar img', function (e) { if(searchPaperListAvatarThumb.length === 0 && searchPaperListAvatar.length === 0) { $('#templateSearchResultContainer .paperlist-avatar img').each(function () { var webversion = $(this).attr('data-web'); var width = $(this).attr('data-width'); var height = $(this).attr('data-height'); var caption = $(this).attr('data-caption'); var figure = { src: webversion, w: width, h: height, title: caption }; searchPaperListAvatarThumb.push($(this)[0]); searchPaperListAvatar.push(figure); }); } var target = $(this); var index = $('#templateSearchResultContainer .paperlist-avatar img').index(target); var options = { showHideOpacity:false, bgOpacity:0.8, index:index, spacing:0.15, history: false, focus:false, getThumbBoundsFn: function(index) { var thumbnail = searchPaperListAvatarThumb[index]; var pageYScroll = window.pageYOffset || document.documentElement.scrollTop; var rect = thumbnail.getBoundingClientRect(); return {x:rect.left, y:rect.top + pageYScroll, w:rect.width}; } }; search_gallery = new PhotoSwipe( search_pswpElement, PhotoSwipeUI_Default,[searchPaperListAvatar[index]],options); search_gallery.init(); }); } function showError(code, msg) { console.error(code, msg); $("#templateSearchLoadingModal").modal("hide"); switch(code) { case -3: // http request fail case -2: // invalid MO response case 4: // CORS case 1: // project $("#templateSearchErrorModal1").modal({}); break; case -1: // timeout $("#templateSearchErrorModal2").modal({}); break; case 2: // empty term $("#templateSearchErrorModal3").modal({}); break; case 3: // DOS $("#templateSearchErrorModal4").modal({}); break; default: $("#templateSearchErrorModal1").modal({}); break; } } function clearForm() { var myFormElement = document.getElementById("library-filters") var elements = myFormElement.elements; $(".form-check-input").prop('checked', false).change().parent().removeClass('active'); for(i=0; i<elements.length; i++) { field_type = elements[i].type.toLowerCase(); switch(field_type) { case "text": case "password": case "textarea": case "hidden": elements[i].value = ""; break; case "radio": case "checkbox": if (elements[i].checked) { elements[i].checked = false; } break; case "select-one": case "select-multi": elements[i].selectedIndex = -1; break; default: break; } } } function generateShowMoreButton(offset, term) { var code = '<button aria-label="ShowMore" id="showMore" class="btn btn-success float-right mr-2" data-offset="' + offset + '">Show more</button>'; return code; } function hideModal(id) { $("#"+id).modal('hide'); } function showModal(id) { $("#"+id).modal({}); } function prepareForPhotoSwipe() { searchPaperListAvatar = []; searchPaperListAvatarThumb = []; search_pswpElement = document.querySelectorAll('.pswp')[0]; } function _sendAjax(projectID, term) { let httpRequest = new XMLHttpRequest(); if(searchRunning) { console.log("Search running"); return; } if (!httpRequest) { console.error("Giving up :( Cannot create an XMLHTTP instance"); showError(-1); return false; } // httpRequest.timeout = 20000; // time in milliseconds httpRequest.withCredentials = false; httpRequest.ontimeout = (e) => { showError(-1, "result timeout"); searchRunning = false; }; httpRequest.onreadystatechange = function() { if (httpRequest.readyState === XMLHttpRequest.DONE) { searchRunning = false; if (httpRequest.status === 200) { let rs = JSON.parse(httpRequest.responseText); if(rs) { if(rs.isError) { showError(rs.errorCode, rs.errorMessage); } else { let html = rs.resultHTMLs; $("#modal_search_query").val(rs.term); $("#templateSearchResultTerm").html(rs.term); $("#templateSearchResultNr").html(rs.resultsNr); $("#templateRefineSearch").html(rs.filter); if(rs.filter == false) { console.log('filter empty'); $("#refineSearchModal").removeClass('d-block').addClass('d-none'); } if(rs.resultsNr==1) $("#templateSearchResultNrPlural").hide(); else $("#templateSearchResultNrPlural").show(); if(rs.resultsNr==0) { hideModal('templateSearchLoadingModal'); $("#templateSearchResultContainer").html(""); $("#templateSearchResultContainerEmpty").removeClass("d-none"); showModal('templateSearchResultModal'); } else { if((rs.resultsNr - offset)>0) { html = html + generateShowMoreButton(offset, term); } $("#templateSearchResultContainerEmpty").addClass("d-none"); if( offset == INITIAL_OFFSET) { hideModal('templateSearchLoadingModal'); $("#templateSearchResultContainer").html(html); showModal('templateSearchResultModal'); } else { $('#showMore').remove(); startHtml = $("#templateSearchResultContainer").html(); $("#templateSearchResultContainer").html(startHtml + html); } // prepareForPhotoSwipe(); } } } else { showError(-2, "invalid result"); } } else { showError(-3, "There was a problem with the request."); } } }; if(offset == INITIAL_OFFSET) { hideModal('templateSearchResultModal'); showModal('templateSearchLoadingModal'); } httpRequest.open("GET", FINDER_URL+"?project="+projectID+"&term="+encodeURI(term)+((offset>INITIAL_OFFSET)?("&offset="+(offset-INITIAL_OFFSET)) : "")); httpRequest.send(); searchRunning = true; } function _runSearch() { var projectID = document.querySelector('meta[name="global_projectID"]').content; var term = _searchTrimInput(SEARCH_INPUT.value); if(term.length > 0) { _sendAjax(projectID, term); } else { showError(2, 'Empty search term') } } function _searchTrimInput(str) { return str.replace(/^\s+|\s+$/gm, ''); } function run() { _addEventListener(); $('#templateSearchInfoBtn, #modalSearchInfoBtn').popover({ sanitize: false, html: true, content: $("#templateSearchInfo").html(), placement: "bottom", template: '<div class="popover" role="tooltip"><div class="arrow"></div><button class="m-1 float-right btn btn-sm btn-danger" id="templateSearchInfoClose"><i class="fas fa-times-circle"></i></button><h3 class="popover-header"></h3><div class="popover-body"></div></div>', title: "Search tips", }); $(document).click(function (e) { let t = $(e.target); let a = t && t.attr("data-toggle")!=="popover" && t.parent().attr("data-toggle")!=="popover"; let b = t && $(".popover").has(t).length===0; if(a && b) { $('#templateSearchInfoBtn').popover('hide'); $('#modalSearchInfoBtn').popover('hide'); } }); $('#templateSearchInfoBtn').on('shown.bs.popover', function () { $("#templateSearchInfoClose").click(function(e){ $('#templateSearchInfoBtn').popover('hide'); e.stopPropagation(); e.stopImmediatePropagation(); return false; }); }) $('#templateSearchResultModal').on('hidden.bs.modal', function(e) { $('body').off('click', '#templateSearchResultContainer .paperlist-avatar img'); var pswpElement = document.querySelectorAll('.pswp')[0]; var gallery = null; var paperListAvatar = []; var paperListAvatarThumb = []; $('.paperlist-avatar img').each(function(){ var webversion = $(this).attr('data-web'); var width = $(this).attr('data-width'); var height = $(this).attr('data-height'); var caption =$(this).attr('data-caption'); var figure = { src:webversion, w:width, h:height, title:caption }; paperListAvatarThumb.push($(this)[0]); paperListAvatar.push(figure); }); $('body').on('click', '.paperlist-avatar img', function (e) { if(paperListAvatarThumb.length === 0 && paperListAvatar.length === 0){ $('.paperlist-avatar img').each(function(){ var webversion = $(this).attr('data-web'); 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However, these metrics can be found on the <a href="https://www.atmospheric-chemistry-and-physics.net/about/journal_metrics.html">journal metrics page</a>.</p></div><div id="news_container" class="cmsbox "> <h2>News</h2> <div class="grid-container paperlist-object"> <div class="hide-on-desktop hide-on-tablet mobile-grid-100"> <a class="paperlist-avatar-unclickable" target="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2025-02-10_small-emission-sources-in-aggregate-disproportionately-account-for-a-large-majority-of-total-methane-emissions-from-the-us-oil-and-gas-sector.html"><img alt="" cofileid="2581514" src="https://www.atmospheric-chemistry-and-physics.net/acp-25-1513-2025-f03-80x80-PR.png" width="80px"/></a> </div> <div class="hide-on-desktop hide-on-tablet mobile-grid-100"> <span class="published-date">10 Feb 2025</span> <a target="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2025-02-10_small-emission-sources-in-aggregate-disproportionately-account-for-a-large-majority-of-total-methane-emissions-from-the-us-oil-and-gas-sector.html" class="article-title">Small emission sources in aggregate disproportionately account for a large majority of total methane emissions from the US oil and gas sector</a> <p class="citation">The authors utilize peer-reviewed facility-level oil and gas methane emission rate data gathered in prior work to estimate the relative contributions of methane sources emitting at different emission rates in the United States. Read more. <a target="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2025-02-10_small-emission-sources-in-aggregate-disproportionately-account-for-a-large-majority-of-total-methane-emissions-from-the-us-oil-and-gas-sector.html"><img cofileid="17978" alt="" src="https://www.atmospheric-chemistry-and-physics.net/graphic_grey_right_symbol.png"></a></p> </div> <div class="grid-85 tablet-grid-85 hide-on-mobile"> <span class="published-date">10 Feb 2025</span> <a target="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2025-02-10_small-emission-sources-in-aggregate-disproportionately-account-for-a-large-majority-of-total-methane-emissions-from-the-us-oil-and-gas-sector.html" class="article-title">Small emission sources in aggregate disproportionately account for a large majority of total methane emissions from the US oil and gas sector</a> <p class="citation">The authors utilize peer-reviewed facility-level oil and gas methane emission rate data gathered in prior work to estimate the relative contributions of methane sources emitting at different emission rates in the United States. Read more. <a target="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2025-02-10_small-emission-sources-in-aggregate-disproportionately-account-for-a-large-majority-of-total-methane-emissions-from-the-us-oil-and-gas-sector.html"><img cofileid="17978" alt="" src="https://www.atmospheric-chemistry-and-physics.net/graphic_grey_right_symbol.png"></a></p> </div> <div class="grid-15 tablet-grid-15 hide-on-mobile text-right"> <a class=" paperlist-avatar-unclickable" target="" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press/2025-02-10_small-emission-sources-in-aggregate-disproportionately-account-for-a-large-majority-of-total-methane-emissions-from-the-us-oil-and-gas-sector.html"><img alt="" cofileid="2581514" src="https://www.atmospheric-chemistry-and-physics.net/acp-25-1513-2025-f03-80x80-PR.png" width="80px"/></a> </div> <div class="hide-on-desktop hide-on-tablet mobile-grid-100"> <a class="no-border paperlist-avatar-unclickable" target="_blank" href="https://www.egu.eu/news/1252/egu-publications-says-thank-you-to-all-our-2024-journal-and-egusphere-volunteers/"><img alt="" cofileid="163466" src="https://www.atmospheric-chemistry-and-physics.net/acp_graphic_cover_avatar_80x80.png" width="80px"/></a> </div> <div class="hide-on-desktop hide-on-tablet mobile-grid-100"> <span class="published-date">10 Feb 2025</span> <a target="_blank" href="https://www.egu.eu/news/1252/egu-publications-says-thank-you-to-all-our-2024-journal-and-egusphere-volunteers/" class="article-title">Thank you to all our referees in 2024!</a> <p class="citation">A big <a href="https://acp.copernicus.org/articles/24/referees.html">thank you to all referees</a> for their volunteer work in providing fair, thorough, and constructive peer-review reports! Through their invaluable contribution our interactive open-access journals maintain their high scientific standards and their ongoing success. <a target="_blank" href="https://www.egu.eu/news/1252/egu-publications-says-thank-you-to-all-our-2024-journal-and-egusphere-volunteers/"><img cofileid="17978" alt="" src="https://www.atmospheric-chemistry-and-physics.net/graphic_grey_right_symbol.png"></a></p> </div> <div class="grid-85 tablet-grid-85 hide-on-mobile"> <span class="published-date">10 Feb 2025</span> <a target="_blank" href="https://www.egu.eu/news/1252/egu-publications-says-thank-you-to-all-our-2024-journal-and-egusphere-volunteers/" class="article-title">Thank you to all our referees in 2024!</a> <p class="citation">A big <a href="https://acp.copernicus.org/articles/24/referees.html">thank you to all referees</a> for their volunteer work in providing fair, thorough, and constructive peer-review reports! Through their invaluable contribution our interactive open-access journals maintain their high scientific standards and their ongoing success. <a target="_blank" href="https://www.egu.eu/news/1252/egu-publications-says-thank-you-to-all-our-2024-journal-and-egusphere-volunteers/"><img cofileid="17978" alt="" src="https://www.atmospheric-chemistry-and-physics.net/graphic_grey_right_symbol.png"></a></p> </div> <div class="grid-15 tablet-grid-15 hide-on-mobile text-right"> <a class="no-border paperlist-avatar-unclickable" target="_blank" href="https://www.egu.eu/news/1252/egu-publications-says-thank-you-to-all-our-2024-journal-and-egusphere-volunteers/"><img alt="" cofileid="163466" src="https://www.atmospheric-chemistry-and-physics.net/acp_graphic_cover_avatar_80x80.png" width="80px"/></a> </div> <div class="hide-on-desktop hide-on-tablet mobile-grid-100"> <img class="no-border paperlist-avatar-unclickable" alt="" cofileid="732715" src="https://www.atmospheric-chemistry-and-physics.net/image-icon-rocket.png" width="80px"/> </div> <div class="hide-on-desktop hide-on-tablet mobile-grid-100"> <span class="published-date">05 Feb 2025</span> <span class="article-title">Copernicus Publications and all journals left Twitter</span> <p class="citation">The Copernicus Twitter account as well as all Twitter accounts of journals published by us have been deactivated. There will be no automatic feeds of newly posted preprints or published journal articles anymore, we do not actively tweet, and the status informs that the accounts are no longer maintained. Twitter is no longer linked from the journal websites or in the share section of the preprint or journal article HTML pages. </p> </div> <div class="grid-85 tablet-grid-85 hide-on-mobile"> <span class="published-date">05 Feb 2025</span> <span class="article-title">Copernicus Publications and all journals left Twitter</span> <p class="citation">The Copernicus Twitter account as well as all Twitter accounts of journals published by us have been deactivated. There will be no automatic feeds of newly posted preprints or published journal articles anymore, we do not actively tweet, and the status informs that the accounts are no longer maintained. Twitter is no longer linked from the journal websites or in the share section of the preprint or journal article HTML pages. </p> </div> <div class="grid-15 tablet-grid-15 hide-on-mobile text-right"> <img class="no-border paperlist-avatar-unclickable" alt="" cofileid="732715" src="https://www.atmospheric-chemistry-and-physics.net/image-icon-rocket.png" width="80px"/> </div> <div class="j-news-archive-link grid-100 tablet-grid-100 mobile-grid-100"> <a class="btn btn-primary" href="https://www.atmospheric-chemistry-and-physics.net/about/news_and_press.html">News archive</a> </div> </div> </div><div id="highlight-articles" class="cmsbox landing-page"><div id="highlight-paper-content"> <div id="highlight-articles-header"> <h2>Highlight articles</h2> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/24/14029/2024/acp-24-14029-2024-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/24/14029/2024/acp-24-14029-2024-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://acp.copernicus.org/articles/24/14029/2024/acp-24-14029-2024-avatar-web.png" data-width="600" data-height="520" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 17 Dec 2024</div> <a class="article-title" target="_parent" href="https://acp.copernicus.org/articles/24/14029/2024/">Lidar measurements of noctilucent clouds at R铆o Grande, Tierra del Fuego, Argentina</a> <div class="authors">Natalie Kaifler, Bernd Kaifler, Markus Rapp, Guiping Liu, Diego Janches, Gerd Baumgarten, and Jose-Luis Hormaechea</div> <div class="citation">Atmos. Chem. Phys., 24, 14029–14044, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/acp-24-14029-2024,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/acp-24-14029-2024,</span> 2024</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_122134" data-show=".short_summary_122134" data-hide=".short_summary_button_122134" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_122134 ml-2" data-show=".ce_comment_122134" data-hide=".ce_comment_button_122134">Executive editor</span> <div class="j-widget__max short_summary short_summary_122134" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> Noctilucent clouds (NLCs) are silvery clouds that can be viewed during twilight and indicate atmospheric conditions like temperature and water vapor in the upper mesosphere. High-resolution measurements from a remote sensing laser instrument provide NLC height, brightness, and occurrence rate since 2017. Most observations occur in the morning hours, likely caused by strong tidal winds, and NLC ice particles are thus transported from elsewhere to the observing location in the Southern Hemisphere. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_122134" data-show=".short_summary_button_122134">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_122134 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> Noctilucent clouds form in the extremely cold temperatures in the high-latitude summer mesosphere (altitudes of 75-85km). Their formation requires the right combination of water vapour concentrations and temperatures. It has been speculated for example, that increasing frequency of occurrence of such clouds might result from increases in methane concentrations, with the methane being converted into water vapour in the upper stratosphere and mesosphere. This paper reports observations of noctilucent clouds, made using an automated lidar system in southern Argentina, at unexpectedly low latitudes compared to previous Southern Hemisphere observations. Possible explanations, including systematic moistening of the mesosphere by space traffic, are discussed. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_122134" data-show=".ce_comment_button_122134">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/24/14029/2024/acp-24-14029-2024-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/24/14029/2024/acp-24-14029-2024-avatar-thumb80.png" data-web="https://acp.copernicus.org/articles/24/14029/2024/acp-24-14029-2024-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="520" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/24/13681/2024/acp-24-13681-2024-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/24/13681/2024/acp-24-13681-2024-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://acp.copernicus.org/articles/24/13681/2024/acp-24-13681-2024-avatar-web.png" data-width="600" data-height="423" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 11 Dec 2024</div> <a class="article-title" target="_parent" href="https://acp.copernicus.org/articles/24/13681/2024/">Warming effects of reduced sulfur emissions from shipping</a> <div class="authors">Masaru Yoshioka, Daniel P. Grosvenor, Ben B. B. Booth, Colin P. Morice, and Ken S. Carslaw</div> <div class="citation">Atmos. Chem. Phys., 24, 13681–13692, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/acp-24-13681-2024,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/acp-24-13681-2024,</span> 2024</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_120252" data-show=".short_summary_120252" data-hide=".short_summary_button_120252" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_120252 ml-2" data-show=".ce_comment_120252" data-hide=".ce_comment_button_120252">Executive editor</span> <div class="j-widget__max short_summary short_summary_120252" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> A 2020 regulation has reduced sulfur emissions from shipping by about 80 %, leading to a decrease in atmospheric aerosols that have a cooling effect primarily by affecting cloud properties and amounts. Our climate model simulations predict a global temperature increase of 0.04 K over the next 3 decades as a result, which could contribute to surpassing the Paris Agreement's 1.5 °C target. Reduced aerosols may have also contributed to the recent temperature spikes. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_120252" data-show=".short_summary_button_120252">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_120252 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> Strong reduction of sulfur emission from shipping since 2020 provides a rare opportunity to examine the response of climate system to anthropogenic forcing. Using a global climate model, this study estimates a global aerosol effective radiative forcing of 0.13 W m-2 from ship emission reduction. This emission reduction leads to a global mean warming of 0.04 K in 2020-2049 with larger warming at regional scales. The warming may not be evident at present day because of the climate variability, but can represent a significant fraction (17%) of the remaining warming to 1.5 K target. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_120252" data-show=".ce_comment_button_120252">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/24/13681/2024/acp-24-13681-2024-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/24/13681/2024/acp-24-13681-2024-avatar-thumb80.png" data-web="https://acp.copernicus.org/articles/24/13681/2024/acp-24-13681-2024-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="423" width="80" height="80"> </a> </div> </div> <p class="j-news-archive-link grid-container grid-parent"> <strong> <a class="grid-30 tablet-grid-30 mobile-grid-100" href="https://acp.copernicus.org/editors_choice.html">More highlight articles <img cofileid="17978" alt="" src="https://www.atmospheric-chemistry-and-physics.net/graphic_grey_right_symbol.png"></a> <a class="grid-30 tablet-grid-30 mobile-grid-100 a-margin__left-2" target="_blank" href="https://www.egu.eu/news/highlight-articles/">All EGU highlight articles <img cofileid="17978" alt="" src="https://www.atmospheric-chemistry-and-physics.net/graphic_grey_right_symbol.png"></a> </strong> </p> </div>    </div><div id="recent_paper" class="cmsbox j-article j-article-section"><div id="recent-paper-content"> <div id="recent_paper_header"> <h2>Recent papers</h2> </div> <div class="grid-container paperlist-object type-0 in-range paperList-discussion" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 17 Feb 2025</div> <a class="article-title" target="_parent" href="https://egusphere.copernicus.org/preprints/2025/egusphere-2025-162/">Global atmospheric inversion of the NH<sub>3</sub> emissions over 2019–2022 using the LMDZ-INCA chemistry-transport model and the IASI NH<sub>3</sub> observations</a> <div class="authors">Pramod Kumar, Gr茅goire Broquet, Didier Hauglustaine, Maureen Beaudor, Lieven Clarisse, Martin Van Damme, Pierre Coheur, Anne Cozic, Bo Zheng, Beatriz Revilla Romero, Antony Delavois, and Philippe Ciais</div> <div class="citation">EGUsphere, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/egusphere-2025-162,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/egusphere-2025-162,</span> 2025</div> <div class="statusMessage"><span>Preprint under review for ACP</span> <nobr>(discussion: open, 0 comments)</nobr></div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_126528" data-show=".short_summary_126528" data-hide=".short_summary_button_126528" >Short summary</span> <div class="j-widget__max short_summary short_summary_126528" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> Global maps of the NH<sub>3</sub> emissions over 2019–2022 are derived using IASI NH<sub>3</sub> spaceborne observations, the LMDZ-INCA chemistry-transport model at 1.27°×2.5° resolution and mass balance approach. The average global NH<sub>3</sub> emissions over the period are ~98 Tg NH<sub>3</sub> yr<sup>-1</sup>, which is significantly higher than three reference inventories. The analysis provides confidence in the seasonal variability and regional budgets, and provides new insights into NH<sub>3</sub> emissions at global and regional scales. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_126528" data-show=".short_summary_button_126528">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/25/1965/2025/acp-25-1965-2025-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/25/1965/2025/acp-25-1965-2025-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://acp.copernicus.org/articles/25/1965/2025/acp-25-1965-2025-avatar-web.png" data-width="330" data-height="600" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 14 Feb 2025</div> <a class="article-title" target="_parent" href="https://acp.copernicus.org/articles/25/1965/2025/">Diurnal, seasonal, and interannual variations in <i>未</i>(<sup>18</sup>O) of atmospheric O<sub>2</sub> and its application to evaluate natural and anthropogenic changes in oxygen, carbon, and water cycles</a> <div class="authors">Shigeyuki Ishidoya, Satoshi Sugawara, and Atsushi Okazaki</div> <div class="citation">Atmos. Chem. Phys., 25, 1965–1987, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/acp-25-1965-2025,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/acp-25-1965-2025,</span> 2025</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_118557" data-show=".short_summary_118557" data-hide=".short_summary_button_118557" >Short summary</span> <div class="j-widget__max short_summary short_summary_118557" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> The <sup>18</sup>O/<sup>16</sup>O ratio of atmospheric oxygen, δ<sub>atm</sub>(<sup>18</sup>O), is higher than that of ocean water due to isotopic effects during biospheric activities. This is known as the Dole–Morita effect, and its millennial-scale variations are recorded in ice cores. However, small variations of δ<sub>atm</sub>(<sup>18</sup>O) in the present day have never been detected so far. This paper presents the first observations of diurnal, seasonal, and secular variations in δ<sub>atm</sub>(<sup>18</sup>O) and applies them to evaluate oxygen, carbon, and water cycles. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_118557" data-show=".short_summary_button_118557">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/25/1965/2025/acp-25-1965-2025-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/25/1965/2025/acp-25-1965-2025-avatar-thumb80.png" data-web="https://acp.copernicus.org/articles/25/1965/2025/acp-25-1965-2025-avatar-web.png" data-width="330" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="600" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/25/1497/2025/acp-25-1497-2025-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/25/1497/2025/acp-25-1497-2025-avatar-thumb80.png" data-caption="漏 Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, OpenStreetMap contributors, and the GIS User Community. All rights reserved." data-web="https://acp.copernicus.org/articles/25/1497/2025/acp-25-1497-2025-avatar-web.png" data-width="600" data-height="250" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 14 Feb 2025</div> <a class="article-title" target="_parent" href="https://acp.copernicus.org/articles/25/1497/2025/">Airborne in situ quantification of methane emissions from oil and gas production in Romania</a> <div class="authors">Hossein Maazallahi, Foteini Stavropoulou, Samuel Jonson Sutanto, Michael Steiner, Dominik Brunner, Mariano Mertens, Patrick J枚ckel, Antoon Visschedijk, Hugo Denier van der Gon, Stijn Dellaert, Nataly Velandia Salinas, Stefan Schwietzke, Daniel Zavala-Araiza, Sorin Ghemulet, Alexandru Pana, Magdalena Ardelean, Marius Corbu, Andreea Calcan, Stephen A. Conley, Mackenzie L. Smith, and Thomas R枚ckmann</div> <div class="citation">Atmos. Chem. Phys., 25, 1497–1511, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/acp-25-1497-2025,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/acp-25-1497-2025,</span> 2025</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_121829" data-show=".short_summary_121829" data-hide=".short_summary_button_121829" >Short summary</span> <div class="j-widget__max short_summary short_summary_121829" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> This article presents insights from airborne in situ measurements collected during the ROmanian Methane Emissions from Oil and gas (ROMEO) campaign supported by two models. Results reveal Romania's oil and gas methane emissions were significantly under-reported to the United Nations Framework Convention on Climate Change (UNFCCC) in 2019. A large underestimation was also found in the Emissions Database for Global Atmospheric Research (EDGAR) v7.0 for the study domain in the same year. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_121829" data-show=".short_summary_button_121829">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> <a class="paperlist-avatar" target="_blank" href="https://acp.copernicus.org/articles/25/1497/2025/acp-25-1497-2025-avatar-web.png"> <img class="img-responsive" src="https://acp.copernicus.org/articles/25/1497/2025/acp-25-1497-2025-avatar-thumb80.png" data-web="https://acp.copernicus.org/articles/25/1497/2025/acp-25-1497-2025-avatar-web.png" data-width="600" data-caption="漏 Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, OpenStreetMap contributors, and the GIS User Community. All rights reserved." data-height="250" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object type-0 in-range paperList-discussion" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 14 Feb 2025</div> <a class="article-title" target="_parent" href="https://egusphere.copernicus.org/preprints/2025/egusphere-2024-3370/">Differential characterization of air ions in boreal forest of Finland and megacity of eastern China</a> <div class="authors">Tinghan Zhang, Ximeng Qi, Janne Lampilahti, Liangduo Chen, Xuguang Chi, Wei Nie, Xin Huang, Zehao Zou, Wei Du, Tom Kokkonen, Tuukka Pet盲j盲, Katrianne Lehtipalo, Veli-Matti Kerminen, Aijun Ding, and Markku Kulmala</div> <div class="citation">EGUsphere, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/egusphere-2024-3370,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/egusphere-2024-3370,</span> 2025</div> <div class="statusMessage"><span>Preprint under review for ACP</span> <nobr>(discussion: open, 0 comments)</nobr></div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_124489" data-show=".short_summary_124489" data-hide=".short_summary_button_124489" >Short summary</span> <div class="j-widget__max short_summary short_summary_124489" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> By comparing air ions at two “flagship” sites —the SMEAR II site in the boreal forest of Finland and the SORPES site in a megacity in eastern China—we characterized ion concentrations and their roles in new particle formation (NPF) across contrasting environments. The ion-induced fraction was much higher in clean areas. However, earlier activation of charged particles and high ion-induced fraction during quiet NPF at SORPES imply a non-negligible role for ion-induced NPF in polluted areas. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_124489" data-show=".short_summary_button_124489">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> </div> </div> <div class="grid-container paperlist-object type-0 in-range paperList-discussion" data-diff="0"> <div class="grid-100 hide-on-desktop hide-on-tablet"> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 14 Feb 2025</div> <a class="article-title" target="_parent" href="https://egusphere.copernicus.org/preprints/2025/egusphere-2025-235/">Observationally Constrained Analysis on the Distribution of Fine and Coarse Mode Nitrate in Global Climate Models</a> <div class="authors">Mingxuan Wu, Hailong Wang, Zheng Lu, Xiaohong Liu, Huisheng Bian, David Cohen, Yan Feng, Mian Chin, Didier A. Hauglustaine, Vlassis A. Karydis, Marianne T. Lund, Gunnar Myhre, Andrea Pozzer, Michael Schulz, Ragnhild B. Skeie, Alexandra P. Tsimpidi, Svetlana G. Tsyro, and Shaocheng Xie</div> <div class="citation">EGUsphere, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/egusphere-2025-235,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/egusphere-2025-235,</span> 2025</div> <div class="statusMessage"><span>Preprint under review for ACP</span> <nobr>(discussion: open, 0 comments)</nobr></div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_126625" data-show=".short_summary_126625" data-hide=".short_summary_button_126625" >Short summary</span> <div class="j-widget__max short_summary short_summary_126625" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> A key challenge in simulating the lifecycle of nitrate aerosol in global climate models is to accurately represent mass size distribution of nitrate aerosol, which lacks sufficient observational constraints. We found that most climate models underestimate the mass fraction of fine-mode nitrate at surface in all regions. Our study highlights the importance of gas-aerosol partitioning parameterization and simulation of dust and sea salt in correctly simulating mass size distribution of nitrate. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_126625" data-show=".short_summary_button_126625">Hide</a></div> </div> </div> </div> <div class="grid-15 tablet-grid-15 text-right hide-on-mobile"> </div> </div> </div>    </div><div id="special-issues-scheduled-content" class="cmsbox "> <div id="special-issues-header"><h2>Scheduled special issues</h2></div> <div class="grid-container grid-parent"> <div class="grid-100 tablet-grid-100 mobile-grid-100 grid-parent" id="chronologically"> <div class="grid-container grid-parent special-issue triangle_special_issues"> <div class="grid-100 tablet-grid-100 mobile-grid-100 title triangle-content"> <a href="javascript:void(0);" class="show-hide" data-toggle="#info-chronologically-content-1354,#info-chronologically-link-1354" data-duration="300"> Greenhouse gas monitoring in the Asia–Pacific region </a> (ACP/AMT/GMD inter-journal SI) </div> <div class="grid-100 tablet-grid-100 mobile-grid-100 date"> 24 Jan 2025–30 Jun 2026 | ACP editors | Coordinators: Christoph Gerbig (Max Planck Institute for Biogeochemistry, Germany) and Tanja Schuck (Goethe University Frankfurt, Germany)| Co-organizers: Huilin Chen (Nanjing University, China), Bo Yao (Fudan University, China), and Pengfei Han (Chinese Academy of Sciences, China) | <a href="javascript:void(0);" class="info-link show-hide" id="info-chronologically-link-1354" data-show="#info-chronologically-content-1354" data-hide="#info-chronologically-link-1354">Information</a> </div> <div class="j-widget__max short_summary" id="info-chronologically-content-1354" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Information</div> <div class="content" id="1354"> <p>We invite original research, reviews, and case studies that focus on atmospheric greenhouse gas (GHG) monitoring, emission estimates, and mitigation strategies, particularly in the Asia–Pacific region.</p> </div> <div class="row"> <div class="col-auto"> <a href="#" class="show-hide triangle" data-hide="#info-chronologically-content-1354" data-show="#info-chronologically-link-1354">Hide</a> </div> <div class="col text-right"> <a class="si-mobile-native-share" href="#" data-title="Greenhouse gas monitoring in the Asia–Pacific region" data-url="" data-id="1354" style="display: none;"> <i class="fas fa-lg fa-share-alt"></i> </a> <a class="desktop-share" href="#" data-title="Greenhouse gas monitoring in the Asia–Pacific region" data-url="" data-id="1354" title="Copy to clipboard"> <i class="fas fa-lg fa-share-alt"></i> </a> </div> </div> </div> </div> </div> <div class="grid-container grid-parent special-issue triangle_special_issues"> <div class="grid-100 tablet-grid-100 mobile-grid-100 title triangle-content"> <a href="javascript:void(0);" class="show-hide" data-toggle="#info-chronologically-content-1347,#info-chronologically-link-1347" data-duration="300"> CoMet 2.0 Arctic: a mission to improve our understanding of carbon dioxide and methane cycles at high northern latitudes </a> (AMT/ACP/GMD inter-journal SI) </div> <div class="grid-100 tablet-grid-100 mobile-grid-100 date"> 01 Oct 2024–30 Sep 2026 | ACP editors | Coordinators: Tanja Schuck (Goethe University Frankfurt, Germany) and Christoph Gerbig (Max Planck Institute for Biogeochemistry, Germany) | <a href="javascript:void(0);" class="info-link show-hide" id="info-chronologically-link-1347" data-show="#info-chronologically-content-1347" data-hide="#info-chronologically-link-1347">Information</a> </div> <div class="j-widget__max short_summary" id="info-chronologically-content-1347" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Information</div> <div class="content" id="1347"> <p>The climate crisis is one of the grand challenges of the 21st century. The increase in Earth's surface temperature, commonly known as global warming or anthropogenically induced climate change, is primarily driven by the rise in greenhouse gases (GHGs) in the atmosphere. The two most significant greenhouse gases affected by human activity are carbon dioxide (CO<sub>2</sub>) and methane (CH<sub>4</sub>).</p><p>While human activities such as fossil fuel combustion, oil and gas exploration, waste management, and agriculture are major sources of GHGs, natural sources also play a significant role. Extensive wetlands, for example, are the largest natural source of CH<sub>4</sub> globally. In wetlands, methane is produced by soil microbes and plants that metabolize under anaerobic conditions and is then released into the atmosphere through diffusion, transport via plant tissues, and gas bubble emissions. These processes make global wetlands among the most important yet least understood sources and sinks in the global methane and CO<sub>2</sub> budget.</p><p>A major scientific challenge in this context is distinguishing between methane emissions from natural sources and those resulting from human activities. Our understanding of these processes, their relative magnitudes, and the associated feedback mechanisms – such as increased wildfire activity, permafrost thaw, or changes in inundation patterns – is still insufficient to fully meet the needs of scientists and policymakers in predicting and mitigating climate warming.</p><p>To enhance our understanding of greenhouse gas budgets, a series of airborne measurement campaigns, known as CoMet (Carbon Dioxide and Methane Mission), have been conducted using the unique capabilities of the German research aircraft <i>HALO</i>. The CoMet campaigns integrate active airborne remote sensing measurements with lasers, passive remote sensing with spectrometers and solar radiation, and advanced in situ greenhouse gas concentration measurements, alongside an extensive suite of meteorological parameters. These observations are further supported by extensive modelling activities that also contribute to validating existing GHG satellite data and preparing for the next generation of such missions.</p> <p>The first CoMet campaign took place in 2018, and its findings were published in a special inter-journal issue of AMT/ACP/GMD. The follow-up campaign, CoMet 2.0 Arctic (<a href="https://comet2arctic.de"target="_blank">https://comet2arctic.de</a>), was successfully conducted during a 6-week intensive operation period in August and September 2022 in Canada. The research flights focused on greenhouse gas emissions from boreal wetlands, permafrost areas in the Canadian Arctic, and wildfires, as well as anthropogenic sources like oil, gas, and coal extraction sites and landfills (in Canada and, during a test flight, in Spain). This campaign provided a valuable dataset for understanding methane and carbon dioxide cycles, particularly at high northern latitudes.</p><p>CoMet 2.0 Arctic is also part of the transatlantic AMPAC (Arctic Methane and Permafrost Challenge) initiative, a collaborative effort between NASA and ESA that fosters cooperation among US, Canadian, and European research institutes in this crucial area of research.</p><p>The special issue is open to all contributions that fit the topic from participants of the CoMet 2.0 Arctic field mission, the AMPAC community, and associated research partners.</p> </div> <div class="row"> <div class="col-auto"> <a href="#" class="show-hide triangle" data-hide="#info-chronologically-content-1347" data-show="#info-chronologically-link-1347">Hide</a> </div> <div class="col text-right"> <a class="si-mobile-native-share" href="#" data-title="CoMet 2.0 Arctic: a mission to improve our understanding of carbon dioxide and methane cycles at high northern latitudes" data-url="" data-id="1347" style="display: none;"> <i class="fas fa-lg fa-share-alt"></i> </a> <a class="desktop-share" href="#" data-title="CoMet 2.0 Arctic: a mission to improve our understanding of carbon dioxide and methane cycles at high northern latitudes" data-url="" data-id="1347" title="Copy to clipboard"> <i class="fas fa-lg fa-share-alt"></i> </a> </div> </div> </div> </div> </div> <div class="grid-container grid-parent special-issue triangle_special_issues"> <div class="grid-100 tablet-grid-100 mobile-grid-100 title triangle-content"> <a href="https://acp.copernicus.org/articles/special_issue1332.html">Exploring impacts of troposphere–stratosphere coupling processes and challenges of forecasting extreme events in the Asian summer monsoon in a changing climate</a> (ACP/WCD inter-journal SI) </div> <div class="grid-100 tablet-grid-100 mobile-grid-100 date"> 01 Aug 2024–31 Jan 2026 | ACP co-editors | Coordinators: Peter Haynes (University of Cambridge, United Kingdom) and Rolf M眉ller (Forschungszentrum J眉lich, Germany) | Co-organizers: Suvarna Fadnavis (Indian Institute of Tropical Meteorology, India), Marc von Hobe (Forschungszentrum J眉lich, Germany), E.N. Rajagopal (Indian Institute of Tropical Meteorology, India), and Parthasarathi Mukhopadhyay (Indian Institute of Tropical Meteorology, India) | <a href="javascript:void(0);" class="info-link show-hide" id="info-chronologically-link-1332" data-show="#info-chronologically-content-1332" data-hide="#info-chronologically-link-1332">Information</a> </div> <div class="j-widget__max short_summary" id="info-chronologically-content-1332" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Information</div> <div class="content" id="1332"> <p>The Asian summer monsoon (ASM) plays a key role in the vertical transport of material (including anthropogenic pollutants, aerosols, aerosol precursors, and other important trace gases) across the tropopause, with significant impacts on stratospheric chemistry and dynamics regionally and globally. Additionally, the Asian region is experiencing increasingly frequent and severe weather extremes connected to the ASM that are causing unprecedented damage to public property and loss of life. Predicting localized extreme events with sufficient lead times using numerical weather prediction (NWP) models remains challenging, and recent research suggests that better representation of stratospheric processes in NWP models can help to improve the prediction of monsoon extremes. On the other hand, it is well recognized that the complexities of the underlying mechanisms of stratosphere–troposphere coupling processes are difficult to incorporate in NWP models.</p> <p>Observational and modelling aspects of the stratosphere–troposphere coupling processes and extreme weather events associated with the Asian summer monsoon were addressed at an international workshop, Stratosphere-Troposphere Interactions and Prediction of Monsoon weather EXtremes (STIPMEX), in Pune, India, from 2 to 7 June 2024. The STIPMEX workshop provided a platform for discussions on dynamical, chemical, radiative, and convective processes of the atmosphere during the ASM and fostered knowledge exchange and collaboration between experts on stratosphere–troposphere interactions and extreme weather prediction. The workshop aimed to promote and improve the inclusion of stratospheric and tropospheric processes in NWP models for better predictability of monsoon extremes. Full information on the STIPMEX workshop including a detailed list of themes and topics as well as an overview of the delivered presentations can be found at <a href="https://sparc-extreme.tropmet.res.in/"target="_blank">https://sparc-extreme.tropmet.res.in/</a>.</p> <p>This special issue has been initiated to publish the new and original research presented during STIPMEX and make it available to the wider community, and all STIPMEX presenters are encouraged to submit full write-ups of their novel and so far unpublished scientific studies. Submissions of follow-on studies or material representing a product of conference discussions and knowledge exchange are also welcome, as are any other submissions or related and relevant work that fits the scope of the workshop and special issue.</p> <p>To best accommodate the two overarching STIPMEX themes, (i) dynamical, chemical, radiative, and convective processes in general, with a particular emphasis on recent changes and trends in stratosphere–troposphere coupling and linkages between stratospheric aerosol variability (e.g. due to volcanic eruptions) and the Asian summer monsoon, and (ii) the challenges of forecasting extreme weather events during the Asian summer monsoon, the special issue is organized as an inter-journal special issue of Atmospheric Chemistry and Physics (ACP) and Weather and Climate Dynamics (WCD).</p> </div> <div class="row"> <div class="col-auto"> <a href="#" class="show-hide triangle" data-hide="#info-chronologically-content-1332" data-show="#info-chronologically-link-1332">Hide</a> </div> <div class="col text-right"> <a class="si-mobile-native-share" href="#" data-title="Exploring impacts of troposphere–stratosphere coupling processes and challenges of forecasting extreme events in the Asian summer monsoon in a changing climate" data-url="https://acp.copernicus.org/articles/special_issue1332.html" data-id="1332" style="display: none;"> <i class="fas fa-lg fa-share-alt"></i> </a> <a class="desktop-share" href="#" data-title="Exploring impacts of troposphere–stratosphere coupling processes and challenges of forecasting extreme events in the Asian summer monsoon in a changing climate" data-url="https://acp.copernicus.org/articles/special_issue1332.html" data-id="1332" title="Copy to clipboard"> <i class="fas fa-lg fa-share-alt"></i> </a> </div> </div> </div> </div> </div> <div class="grid-container grid-parent special-issue triangle_special_issues"> <div class="grid-100 tablet-grid-100 mobile-grid-100 title triangle-content"> <a href="https://acp.copernicus.org/articles/special_issue400_1320.html">The Joint Aeolus Tropical Atlantic Campaign (JATAC)</a> (AMT/ACP inter-journal SI) </div> <div class="grid-100 tablet-grid-100 mobile-grid-100 date"> 30 May 2024–31 May 2026 | ACP co-editors | Coordinators: Stelios Kazadzis (Physikalisch-Meteorologisches Observatorium Davos, Switzerland) and Manvendra Krishna Dubey (Los Alamos National Laboratory, United States) | Co-organizers: Thorsten Fehr (European Space Agency, France), Vassilis Amiridis (National Observatory of Athens, Greece), Cyrille Flamant (French National Centre for Scientific Research, France), Eleni Marinou (National Observatory of Athens, Greece), Harri Kokkola (Finnish Meteorological Institute, Finland), Marco Gaetani (Istituto Universitario di Studi Superiori di Pavia, Italy), and Oleg Dubovik (French National Centre for Scientific Research, France) | <a href="javascript:void(0);" class="info-link show-hide" id="info-chronologically-link-1320" data-show="#info-chronologically-content-1320" data-hide="#info-chronologically-link-1320">Information</a> </div> <div class="j-widget__max short_summary" id="info-chronologically-content-1320" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Information</div> <div class="content" id="1320"> <p>The Joint Aeolus Tropical Atlantic Campaign (JATAC) used ground-based, aircraft, and balloon measurements to validate data provided by ESA's Aeolus satellite and support related science activities on the interaction of wind, dust, and clouds. ESA鈥檚 Aeolus satellite observations are expected to have the biggest impact on the improvement of numerical weather prediction in the tropics. An important case relating to the predictability of tropical weather systems is the outflow of Saharan dust, its interaction with cloud microphysics, and its impact on the development of tropical storms over the Atlantic Ocean. JATAC, deployed over Cabo Verde (2021–2022) and the US Virgin Islands (2021), supported the validation and preparation of the ESA Aeolus, EarthCARE, and WIVERN missions. It also addressed science objectives regarding the Saharan aerosol layer, the African easterly waves and jet, the tropical easterly jet, and the Intertropical Convergence Zone (including their relation to the formation of convective systems) as well as the long-range transport of dust and its impact on air quality.</p> <p>This special issue (SI) collects the studies that utilized the synergy of remote sensing, surface-based, and airborne observations to address the satellite validation objectives and spatio-temporal representativeness of the different atmospheric measurement techniques. The SI studies bring together different observations from the individual ground-based and airborne campaign activities that have taken place in the frame of JATAC, to demonstrate the added value of the synergistic use of different measurements and platforms to address open science questions related to dynamics and the interactions of aerosols with clouds and radiation.</p> </div> <div class="row"> <div class="col-auto"> <a href="#" class="show-hide triangle" data-hide="#info-chronologically-content-1320" data-show="#info-chronologically-link-1320">Hide</a> </div> <div class="col text-right"> <a class="si-mobile-native-share" href="#" data-title="The Joint Aeolus Tropical Atlantic Campaign (JATAC)" data-url="https://acp.copernicus.org/articles/special_issue400_1320.html" data-id="1320" style="display: none;"> <i class="fas fa-lg fa-share-alt"></i> </a> <a class="desktop-share" href="#" data-title="The Joint Aeolus Tropical Atlantic Campaign (JATAC)" data-url="https://acp.copernicus.org/articles/special_issue400_1320.html" data-id="1320" title="Copy to clipboard"> <i class="fas fa-lg fa-share-alt"></i> </a> </div> </div> </div> </div> </div> <div class="grid-container grid-parent special-issue triangle_special_issues"> <div class="grid-100 tablet-grid-100 mobile-grid-100 title triangle-content"> <a href="https://acp.copernicus.org/articles/special_issue365_1294.html">Mercury science to inform international policy: the Multi-Compartment Hg Modeling and Analysis Project (MCHgMAP) and other research</a> (GMD/ACP/BG inter-journal SI) </div> <div class="grid-100 tablet-grid-100 mobile-grid-100 date"> 10 Nov 2023–indefinite | ACP co-editors | Coordinators: Aur茅lien Dommergue (Grenoble Alpes University, France) and Ralf Ebinghaus (Helmholtz-Zentrum Hereon, Germany)| Co-organizers: Ashu Dastoor (Environment and Climate Change Canada, Canada), Helene Angot (CNRS/Grenoble Alpes University, France), Aryeh Feinberg (Institute for Data, Systems, and Society, Massachusetts Institute of Technology, USA), Che-Jen Lin (Lamar University, USA), Andrei Ryjkov (Environment and Climate Change Canada, Canada), Oleg Travnikov (Jo啪ef Stefan Institute, Slovenia), and Qingru Wu (State Key Joint Laboratory of Environmental Simulation and Pollution Control, China) | <a href="javascript:void(0);" class="info-link show-hide" id="info-chronologically-link-1294" data-show="#info-chronologically-content-1294" data-hide="#info-chronologically-link-1294">Information</a> </div> <div class="j-widget__max short_summary" id="info-chronologically-content-1294" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Information</div> <div class="content" id="1294"> <p>Mercury (Hg) is a chemical pollutant of human health concern worldwide; a consequence of anthropogenic activities; and the focus of the Minamata Convention on Mercury (MC; <a href="https://minamataconvention.org/en"target="_blank">https://minamataconvention.org/en</a>), an international treaty to protect human health and the environment from the adverse effects of mercury. The MC entered into force on 16 August 2017 and committed to limiting the use and environmental release of mercury. Also, the 1998 Protocol on Heavy Metals of the 1979 Convention on Long-Range Transboundary Air Pollution (LRTAP) commits parties to mitigating emissions of mercury (as well as cadmium and lead) from a variety of point sources and provides guidance on mitigating emissions associated with heavy metal use in manufactured products. The MC framework requires an evaluation of the effectiveness of its measures in meeting the objectives beginning no later than 6 years after the convention鈥檚 entry into force and periodically thereafter. The Protocol on Heavy Metals requires a periodic review of the progress towards meeting the obligations in the protocol and the sufficiency and effectiveness of those obligations and an evaluation of whether additional emission reductions are warranted.</p> <p>This multi-journal special issue (SI) is intended to develop the required information that can be scientifically exploited to address key policy questions of the conventions: (1) what are the contributions of anthropogenic emissions and releases and other Hg sources to current Hg levels observed in air, biota, humans, and other media? (2) How have these contribution levels changed over time and over the timeline of the convention? (3) How do the contribution levels and their trends vary geographically at the global scale? (4) What are the contributions of anthropogenic emissions and releases and other drivers to the temporal trends in observed Hg levels across global regions? (5) How are observed Hg levels expected to change in the future?</p> <p>The special issue aims at collecting relevant research advances arising from the design, implementation, and results of the Multi-Compartment Hg Modeling and Analysis Project (MCHgMAP) and from the scientific community on all aspects of biogeochemical mercury cycling, including primary and secondary emissions, observations, process studies, and single to multi-compartmental and statistical model development and application. A challenge of analysing the fate of emitted mercury is that it can recycle between the atmosphere, land, and ocean, and as a result, past and present emissions can continue to affect the environment on timescales of decades to centuries. MCHgMAP is an ensemble modelling initiative developed to inform the effectiveness of evaluations of the MC and LRTAP, utilizing a coordinated modelling approach between single-medium (atmosphere, land, and ocean) and multi-media mercury models to consistently simulate the changing global and regional environmental Hg cycling and analyse its drivers. The SI includes an overview paper on MCHgMAP, describing its scientific background and design (an important and crucial preparatory stage), which will be referenced by the individual papers on this project that follow.</p> </div> <div class="row"> <div class="col-auto"> <a href="#" class="show-hide triangle" data-hide="#info-chronologically-content-1294" data-show="#info-chronologically-link-1294">Hide</a> </div> <div class="col text-right"> <a class="si-mobile-native-share" href="#" data-title="Mercury science to inform international policy: the Multi-Compartment Hg Modeling and Analysis Project (MCHgMAP) and other research" data-url="https://acp.copernicus.org/articles/special_issue365_1294.html" data-id="1294" style="display: none;"> <i class="fas fa-lg fa-share-alt"></i> </a> <a class="desktop-share" href="#" data-title="Mercury science to inform international policy: the Multi-Compartment Hg Modeling and Analysis Project (MCHgMAP) and other research" data-url="https://acp.copernicus.org/articles/special_issue365_1294.html" data-id="1294" title="Copy to clipboard"> <i class="fas fa-lg fa-share-alt"></i> </a> </div> </div> </div> </div> </div> </div> </div> <script> $(function (){ if(!navigator.share){ $('.si-mobile-native-share').hide(); $('.desktop-share').show(); } else { $('.si-mobile-native-share').show(); $('.desktop-share').hide(); } $('.si-mobile-native-share').click((event) => { event.stopPropagation(); event.preventDefault(); event.stopImmediatePropagation(); let element = event.currentTarget; if (navigator.share) { let url = window.getUrl(element); navigator.share({ title: $(element).attr('data-title'), text: '', url: url, }).then(() => { console.log('Successful share'); return false; }) .catch((error) => { console.log('Error sharing', error); return false; }); } return false; }); $('.desktop-share').click((event) => { event.stopPropagation(); event.preventDefault(); event.stopImmediatePropagation(); let element = event.currentTarget; let url = window.getUrl(element); window.updateClipboard(url); return false; }); }); /** * Method for copy something to clipboard * @param newClip */ window.updateClipboard = function (newClip) { if (navigator.clipboard) { navigator.clipboard.writeText(newClip).then(function () { }, function (err) { console.warn('Error during copying to clipboard: ', err.toString()); }); } return false; }; window.getUrl = function (element){ let dataUrl = $(element).attr('data-url'); if(typeof dataUrl !== 'undefined' && dataUrl.length > 0) { return dataUrl } else { let id = $(element).attr('data-id'); return window.location.href + '#' + id; } } </script> </div><div id="cmsbox_285981" class="cmsbox "><h2>Notice on the current situation in Ukraine</h2> <div class="co-notification"><p>To show our support for Ukraine, all fees for papers from authors (first or corresponding authors) affiliated to <strong>Ukrainian institutions</strong> are automatically waived, regardless if these papers are co-authored by scientists affiliated to Russian and/or Belarusian institutions. The only exception will be if the corresponding author or first contact (contractual partner of Copernicus) are from a Russian and/or Belarusian institution, in that case the APCs are not waived.</p> <p>In accordance with current European restrictions, Copernicus Publications does not step into business relations with and issue APC-invoices (articles processing charges) to <strong>Russian and Belarusian institutions</strong>. The peer-review process and scientific exchange of our journals including preprint posting is not affected. 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