WCD - Editor's choice

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Please try again later.</div> </div> </div> </div> </div>  <div class="modal " id="templateSearchLoadingModal" role="dialog" aria-labelledby="Search results" aria-hidden="true"> <div class="modal-dialog modal-sm modal-dialog-centered"> <div class="modal-content p-3 co_LoadingDotsContainer"> <div class="modal-body"> <div class="text">Searching</div> <div class="dots d-flex justify-content-center"><div class="dot"></div><div class="dot"></div><div class="dot"></div></div></div> </div> </div> </div> </div> <style> /*.modal {*/ /* background: rgba(255, 255, 255, 0.8);*/ /*}*/ .modal-header--sticky { position: sticky; top: 0; background-color: inherit; z-index: 1055; } .grid-container { margin-bottom: 1em; /*padding-left: 0;*/ /*padding-right: 0;*/ } #templateSearchInfo{ display: none; background-color: var(--background-color-primary); margin-top: 1px; z-index: 5; border: 1px solid var(--color-primary); opacity: .8; font-size: .7rem; border-radius: .25rem; } #templateSearchLoadingModal .co_LoadingDotsContainer { z-index: 1000; 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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(); 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var queryString = $('#library-filters').serialize(); var term = _searchTrimInput($('#modal_search_query').val()); term+='&'+queryString; if(term.length > 0) { _sendAjax(projectID, term); } else { showError(2, 'Empty search term') } } if(document.getElementById('search_query_solr')) { run(); } </script> </div></div> </div> </div> </div> </div> </header>  <main class="one-column version-2023"> <div id="content" class="container"> <div id="page_content_container" class="CMSCONTAINER row"> <div class="col"> <div class="level1Toc"> <div class="grid-container no-margin"> <div class="grid-100"> <h1>Editor's choice</h1> </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://wcd.copernicus.org/articles/6/211/2025/wcd-6-211-2025-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/6/211/2025/wcd-6-211-2025-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/6/211/2025/wcd-6-211-2025-avatar-web.png" data-width="600" data-height="480" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 18 Feb 2025</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/6/211/2025/">Synoptic perspective on the conversion and maintenance of local available potential energy in extratropical cyclones</a> <div class="authors">Marc Federer, Lukas Papritz, Michael Sprenger, and Christian M. Grams</div> <div class="citation">Weather Clim. Dynam., 6, 211–230, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-6-211-2025,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-6-211-2025,</span> 2025</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_121783" data-show=".short_summary_121783" data-hide=".short_summary_button_121783" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_121783 ml-2" data-show=".ce_comment_121783" data-hide=".ce_comment_button_121783">Executive editor</span> <div class="j-widget__max short_summary short_summary_121783" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> Although extratropical cyclones in the North Atlantic are among the most impactful midlatitude weather systems, their intensification is not entirely understood. Here, we explore how individual cyclones convert available potential energy (APE) into kinetic energy and relate these conversions to the synoptic development of the cyclones. By combining potential vorticity thinking with a local APE framework, we offer a novel perspective on established concepts in dynamic meteorology. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_121783" data-show=".short_summary_button_121783">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_121783 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> This study provides a novel Lagrangian perspective on cyclogenesis grounded in atmospheric energetics. While the energetics framework is commonly used to understand the planetary scale circulation, its application to synoptic scales is less explored. The authors establish a close connection between extratropical baroclinic zones and local available potential energy, and further analyze air parcel trajectories to link conversions between potential and kinetic energy to specific features of the developing cyclones. The results of this study offer insights into the local, synoptic and large scale contributions to cyclogenesis that are relevant for diverse disciplines in atmospheric and climate sciences. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_121783" data-show=".ce_comment_button_121783">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://wcd.copernicus.org/articles/6/211/2025/wcd-6-211-2025-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/6/211/2025/wcd-6-211-2025-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/6/211/2025/wcd-6-211-2025-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="480" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="5"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/5/1187/2024/wcd-5-1187-2024-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/5/1187/2024/wcd-5-1187-2024-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/5/1187/2024/wcd-5-1187-2024-avatar-web.png" data-width="600" data-height="570" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 30 Sep 2024</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/5/1187/2024/">The crucial representation of deep convection for the cyclogenesis of Medicane Ianos</a> <div class="authors">Florian Pantillon, Silvio Davolio, Elenio Avolio, Carlos Calvo-Sancho, Diego Saul Carri贸, Stavros Dafis, Emanuele Silvio Gentile, Juan Jesus Gonzalez-Aleman, Suzanne Gray, Mario Marcello Miglietta, Platon Patlakas, Ioannis Pytharoulis, Didier Ricard, Antonio Ricchi, Claudio Sanchez, and Emmanouil Flaounas</div> <div class="citation">Weather Clim. Dynam., 5, 1187–1205, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-5-1187-2024,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-5-1187-2024,</span> 2024</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_119398" data-show=".short_summary_119398" data-hide=".short_summary_button_119398" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_119398 ml-2" data-show=".ce_comment_119398" data-hide=".ce_comment_button_119398">Executive editor</span> <div class="j-widget__max short_summary short_summary_119398" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> Cyclone Ianos of September 2020 was a high-impact but poorly predicted medicane (Mediterranean hurricane). A community effort of numerical modelling provides robust results to improve prediction. It is found that the representation of local thunderstorms controlled the interaction of Ianos with a jet stream at larger scales and its subsequent evolution. The results help us understand the peculiar dynamics of medicanes and provide guidance for the next generation of weather and climate models. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_119398" data-show=".short_summary_button_119398">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_119398 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> High-impact medicanes, like Ianos September 2020, are occasionally poorly predicted by operational numerical weather prediction models, and it is therefore very important to understand the factors that limit their predictability and to eventually improve predictions. The well-written study by Pantillon et al. investigates simulations of medicane Ianos performed with 10 model setups, using different models, horizontal grid spacings, and representations of moist convection. Their results highlight the critical importance of a high-resolution representation of moist convection, and the coupling of convective and baroclinic processes in the cyclogenesis phase of the medicane. These results from the major modelling undertaking in this study have important ramifications also for practical forecasting. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_119398" data-show=".ce_comment_button_119398">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://wcd.copernicus.org/articles/5/1187/2024/wcd-5-1187-2024-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/5/1187/2024/wcd-5-1187-2024-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/5/1187/2024/wcd-5-1187-2024-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="570" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="10"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/5/763/2024/wcd-5-763-2024-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/5/763/2024/wcd-5-763-2024-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/5/763/2024/wcd-5-763-2024-avatar-web.png" data-width="600" data-height="558" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 22 May 2024</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/5/763/2024/">Elevation-dependent warming: observations, models, and energetic mechanisms</a> <div class="authors">Michael P. Byrne, William R. Boos, and Shineng Hu</div> <div class="citation">Weather Clim. Dynam., 5, 763–777, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-5-763-2024,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-5-763-2024,</span> 2024</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_117386" data-show=".short_summary_117386" data-hide=".short_summary_button_117386" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_117386 ml-2" data-show=".ce_comment_117386" data-hide=".ce_comment_button_117386">Executive editor</span> <div class="j-widget__max short_summary short_summary_117386" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> In this study we investigate why climate change is amplified in mountain regions, a phenomenon known as elevation-dependent warming (EDW). We examine EDW using observations and models and assess the roles of radiative forcing vs. internal variability in driving the historical signal. Using a forcing–feedback framework we also quantify for the first time the processes driving EDW on large scales. Our results have important implications for understanding future climate change in mountain regions. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_117386" data-show=".short_summary_button_117386">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_117386 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> Observations and climate models consistently indicate that, during the past decades in the tropics and subtropics, land surfaces at higher altitudes have been warming faster than lower-elevated ones, a phenomenon denoted as elevation-dependent warming (EDW). In this study, Byrne and co-authors quantify the magnitude of this effect, attribute it to greenhouse gas forcing, and provide a very thorough and comprehensive analysis of the underlying mechanisms. They identify Planck and surface albedo feedback as well as atmospheric energy transport as most important drivers of EDW, while water vapor and cloud feedback oppose EDW. In this way, the authors substantially improve our understanding of a fundamental aspect of current climate warming. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_117386" data-show=".ce_comment_button_117386">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://wcd.copernicus.org/articles/5/763/2024/wcd-5-763-2024-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/5/763/2024/wcd-5-763-2024-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/5/763/2024/wcd-5-763-2024-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="558" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="22"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/4/427/2023/wcd-4-427-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/427/2023/wcd-4-427-2023-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/4/427/2023/wcd-4-427-2023-avatar-web.png" data-width="600" data-height="438" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 12 May 2023</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/4/427/2023/">What distinguishes 100-year precipitation extremes over central European river catchments from more moderate extreme events?</a> <div class="authors">Florian Ruff and Stephan Pfahl</div> <div class="citation">Weather Clim. Dynam., 4, 427–447, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-4-427-2023,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-4-427-2023,</span> 2023</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_106820" data-show=".short_summary_106820" data-hide=".short_summary_button_106820" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_106820 ml-2" data-show=".ce_comment_106820" data-hide=".ce_comment_button_106820">Executive editor</span> <div class="j-widget__max short_summary short_summary_106820" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> In this study, we analyse the generic atmospheric processes of very extreme, 100-year precipitation events in large central European river catchments and the corresponding differences to less extreme events, based on a large time series (~1200 years) of simulated but realistic daily precipitation events from the ECMWF. Depending on the catchment, either dynamical mechanisms or thermodynamic conditions or a combination of both distinguish 100-year events from less extreme precipitation events. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_106820" data-show=".short_summary_button_106820">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_106820 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> Understanding the specific dynamical processes leading to extreme floods is an important but challenging task. Ruff and Pfahl used an innovative approach that allowed them to go beyond single case studies. They used operational ensemble forecasts from the ECMWF during the period 2003-2019 and focused on five major river catchments in Central Europe. Comparing extreme events (with a return period of 100 years) with more moderate events revealed important differences between the catchments. For some catchments the main factors that distinguish 100-year events were the intensity of the upper-level cutoff and surface cyclone, whereas in other catchments the main factor was an increased low-tropospheric moisture supply. The original results clearly illustrate that regional variability is substantial and no single atmospheric process can be claimed responsible for the distinction between extreme and moderate flood events. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_106820" data-show=".ce_comment_button_106820">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://wcd.copernicus.org/articles/4/427/2023/wcd-4-427-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/427/2023/wcd-4-427-2023-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/4/427/2023/wcd-4-427-2023-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="438" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="23"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/4/249/2023/wcd-4-249-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/249/2023/wcd-4-249-2023-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/4/249/2023/wcd-4-249-2023-avatar-web.png" data-width="469" data-height="600" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 28 Mar 2023</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/4/249/2023/">Investigation of links between dynamical scenarios and particularly high impact of Aeolus on numerical weather prediction (NWP) forecasts</a> <div class="authors">Anne Martin, Martin Weissmann, and Alexander Cress</div> <div class="citation">Weather Clim. Dynam., 4, 249–264, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-4-249-2023,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-4-249-2023,</span> 2023</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_107331" data-show=".short_summary_107331" data-hide=".short_summary_button_107331" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_107331 ml-2" data-show=".ce_comment_107331" data-hide=".ce_comment_button_107331">Executive editor</span> <div class="j-widget__max short_summary short_summary_107331" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> Global wind profiles from the Aeolus satellite mission are an important recent substitute for the Global Observing System, showing an overall positive impact on numerical weather prediction forecasts. This study highlights atmospheric dynamic phenomena constituting pathways for significant improvement of Aeolus for future studies, including large-scale tropical circulation systems and the interaction of tropical cyclones undergoing an extratropical transition with the midlatitude waveguide. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_107331" data-show=".short_summary_button_107331">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_107331 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> Numerical weather prediction depends essentially on high-quality upper-air wind observations to constrain the initial conditions. This study by Martin et al. investigates the impact of spaceborne Doppler wind lidar measurements from the Aeolus mission on forecast quality of the operational global forecasting system with ICON at Deutscher Wetterdienst. An observing system experiment shows an overall beneficial impact, and the authors go one important step further and present illustrative examples how events with strong forecast quality improvements can be related to specific dynamical phenomena such as ENSO and the extratropical transition of tropical cyclones. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_107331" data-show=".ce_comment_button_107331">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://wcd.copernicus.org/articles/4/249/2023/wcd-4-249-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/249/2023/wcd-4-249-2023-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/4/249/2023/wcd-4-249-2023-avatar-web.png" data-width="469" 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="26"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/4/95/2023/wcd-4-95-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/95/2023/wcd-4-95-2023-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/4/95/2023/wcd-4-95-2023-avatar-web.png" data-width="600" data-height="503" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 18 Jan 2023</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/4/95/2023/">Reconciling conflicting evidence for the cause of the observed early 21st century Eurasian cooling</a> <div class="authors">Stephen Outten, Camille Li, Martin P. King, Lingling Suo, Peter Y. F. Siew, Hoffman Cheung, Richard Davy, Etienne Dunn-Sigouin, Tore Furevik, Shengping He, Erica Madonna, Stefan Sobolowski, Thomas Spengler, and Tim Woollings</div> <div class="citation">Weather Clim. Dynam., 4, 95–114, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-4-95-2023,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-4-95-2023,</span> 2023</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_104571" data-show=".short_summary_104571" data-hide=".short_summary_button_104571" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_104571 ml-2" data-show=".ce_comment_104571" data-hide=".ce_comment_button_104571">Executive editor</span> <div class="j-widget__max short_summary short_summary_104571" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> Strong disagreement exists in the scientific community over the role of Arctic sea ice in shaping wintertime Eurasian cooling. The observed Eurasian cooling can arise naturally without sea-ice loss but is expected to be a rare event. We propose a framework that incorporates sea-ice retreat and natural variability as contributing factors. A helpful analogy is of a dice roll that may result in cooling, warming, or anything in between, with sea-ice loss acting to load the dice in favour of cooling. </div> <span class="eg-link">This article is included in the <a target="_blank" href="https://encyclopedia-of-geosciences.net">Encyclopedia of Geosciences</a></span> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_104571" data-show=".short_summary_button_104571">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_104571 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> This paper analyses the extensive scientific debate around the potential influence of Arctic warming and sea ice loss on recent cooling trends over the Eurasian continent. It provides a novel, holistic perspective on this debate that goes beyond a simple yes or no answer to the question whether a causal link exists between these two phenomena. As such, it has the potential to bring together seemingly diverging portrayals existing in the literature. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_104571" data-show=".ce_comment_button_104571">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://wcd.copernicus.org/articles/4/95/2023/wcd-4-95-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/95/2023/wcd-4-95-2023-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/4/95/2023/wcd-4-95-2023-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="503" width="80" height="80"> </a> </div> </div> <div class="grid-container paperlist-object in-range paperList-final" data-diff="26"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/4/61/2023/wcd-4-61-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/61/2023/wcd-4-61-2023-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/4/61/2023/wcd-4-61-2023-avatar-web.png" data-width="362" data-height="600" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 13 Jan 2023</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/4/61/2023/">The role of Rossby waves in polar weather and climate</a> <div class="authors">Tim Woollings, Camille Li, Marie Drouard, Etienne Dunn-Sigouin, Karim A. Elmestekawy, Momme Hell, Brian Hoskins, Cheikh Mbengue, Matthew Patterson, and Thomas Spengler</div> <div class="citation">Weather Clim. Dynam., 4, 61–80, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-4-61-2023,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-4-61-2023,</span> 2023</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_105348" data-show=".short_summary_105348" data-hide=".short_summary_button_105348" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_105348 ml-2" data-show=".ce_comment_105348" data-hide=".ce_comment_button_105348">Executive editor</span> <div class="j-widget__max short_summary short_summary_105348" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> This paper investigates large-scale atmospheric variability in polar regions, specifically the balance between large-scale turbulence and Rossby wave activity. The polar regions are relatively more dominated by turbulence than lower latitudes, but Rossby waves are found to play a role and can even be triggered from high latitudes under certain conditions. Features such as cyclone lifetimes, high-latitude blocks, and annular modes are discussed from this perspective. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_105348" data-show=".short_summary_button_105348">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_105348 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> The paper by Tim Woollings et al. provides first a theoretical summary of the role of Rossby wave dynamics for polar variability, regarding the large-scale polar flow conceptually as a superposition of geostrophic turbulence and Rossby wave propagation, emphasising the key role of isolated vortices at high latitudes. In a second part, the paper addresses how comparatively weak Rossby waves can be triggered from high latitudes in the presence of a relative vorticity gradient as a direct response to sea ice loss, which often manifests as a heat low. The paper provides a well written and much needed foundation for an active area of research. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_105348" data-show=".ce_comment_button_105348">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://wcd.copernicus.org/articles/4/61/2023/wcd-4-61-2023-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/4/61/2023/wcd-4-61-2023-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/4/61/2023/wcd-4-61-2023-avatar-web.png" data-width="362" 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="32"> <div class="grid-100 hide-on-desktop hide-on-tablet"> <a class="paperlist-avatar" target="_blank" href="https://wcd.copernicus.org/articles/3/777/2022/wcd-3-777-2022-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/3/777/2022/wcd-3-777-2022-avatar-thumb80.png" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-web="https://wcd.copernicus.org/articles/3/777/2022/wcd-3-777-2022-avatar-web.png" data-width="600" data-height="279" width="80" height="80"> </a> </div> <div class="grid-85 tablet-grid-85"> <div class="published-date"> 21 Jul 2022</div> <a class="article-title" target="_parent" href="https://wcd.copernicus.org/articles/3/777/2022/">Trends in the tropospheric general circulation from 1979 to 2022</a> <div class="authors">Adrian J. Simmons</div> <div class="citation">Weather Clim. Dynam., 3, 777–809, <nobr class="hide-on-mobile hide-on-tablet">https://doi.org/10.5194/wcd-3-777-2022,</nobr><span class="hide-on-desktop">https://doi.org/10.5194/wcd-3-777-2022,</span> 2022</div> <span class="show-hide journal-contentLinkColor triangle short_summary_button_102225" data-show=".short_summary_102225" data-hide=".short_summary_button_102225" >Short summary</span> <span class="show-hide journal-contentLinkColor triangle ce_comment_button_102225 ml-2" data-show=".ce_comment_102225" data-hide=".ce_comment_button_102225">Executive editor</span> <div class="j-widget__max short_summary short_summary_102225" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Short summary</div> <div class="content"> This study of changes in temperature and wind since 1979 met its twin aims of (i) increasing confidence in some findings of the latest IPCC assessment and (ii) identifying changes that had received little or no previous attention. It reports a small overall intensification and shift in position of the North Atlantic jet stream and associated storms, and a strengthening of tropical upper-level easterlies. Increases in low-level winds over tropical and southern hemispheric oceans are confirmed. </div> <div><a href="#" class="show-hide triangle" data-hide=".short_summary_102225" data-show=".short_summary_button_102225">Hide</a></div> </div> </div> <div class="j-widget__max ce_comment ce_comment_102225 mt-3" style="display: none"> <div class="widget dark-border"> <div class="legend journal-contentLinkColor">Executive editor</div> <div class="content"> Analysing and understanding potential trends in the atmospheric circulation over the last decades is an important aspect of atmospheric dynamics. In this article, Adrian Simmons performed a very thorough global trend analysis, with a focus on near-tropopause winds, based on ERA5 reanalyses. The paper provides an excellent overview and emphasises important regional and seasonal differences. It is shown that despite Arctic amplification, the upper-level westerlies mainly strengthened at northern middle latitudes. Focusing on jet-stream wind maxima, it is found that they increased over the North Atlantic. These results and the detailed global trend overview will be useful for the community to further investigate the underlying physical processes that led to these trends in the last decades. </div> <div><a href="#" class="show-hide triangle" data-hide=".ce_comment_102225" data-show=".ce_comment_button_102225">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://wcd.copernicus.org/articles/3/777/2022/wcd-3-777-2022-avatar-web.png"> <img class="img-responsive" src="https://wcd.copernicus.org/articles/3/777/2022/wcd-3-777-2022-avatar-thumb80.png" data-web="https://wcd.copernicus.org/articles/3/777/2022/wcd-3-777-2022-avatar-web.png" data-width="600" data-caption="漏 Author(s). Distributed under the Creative Commons Attribution 4.0 License." data-height="279" width="80" height="80"> </a> </div> </div> <div class="co-notification"> This list shows papers published within the last 1080 days. 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