Researchers Map Soil Organic Carbon and Soil Total Nitrogen in Global Drylands--Xinjiang Institute of Geography and Ecology, Chinese Academy of Sciences

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font-size:10.5pt}</style><div data-index="11"><p data-index="11"><span data-index="11">Soils are the largest carbon and nitrogen pools in terrestrial ecosystems, and small changes in them will have a significant impact on atmospheric CO</span><span data-index="11">2</span><span data-index="11"> and N</span><span data-index="11">2</span><span data-index="11">O concentrations, which in turn will have a huge impact on global climate change. However, understanding of dryland soil carbon and nitrogen stocks remains limited.</span></p><p data-index="11"><span data-index="11">In a study published in </span><em><span data-index="11">Geoderma</span></em><span data-index="11">, a research team led by Prof. ZHANG Yuanming from the Xinjiang Institute of Ecology and Geography (XIEG) of the Chinese Academy of Sciences, explored the spatial distributions of soil organic carbon (SOC) and soil total nitrogen (STN) in global drylands, and predicted changes of SOC and STN stocks under different climate scenarios.</span></p><p data-index="11"><span data-index="11">Researchers used data from 12,000 sites in 129 countries across the global drylands to estimate SOC and STN stocks in different land cover types.</span></p><p data-index="11"><span data-index="11">They found that global drylands SOC and STN stocks in the top 100 cm soils were 419.5 and 38.2 Pg, respectively, with the upper 0-30cm accounting for half of the total. Forests, shrublands, and grasslands were identified as the largest reservoirs of SOC, whereas forests, bare lands, and croplands were the largest reservoirs of STN.</span></p><p data-index="11"><span data-index="11">Researchers used random forest model and structural equation model to explore the drivers and their effects on SOC and STN. They found that for the upper 0-30 cm soils, mean annual temperature, pH, and aridity were the main factors driving spatial patterns of SOC and STN densities; for 60-100 cm soils, soil texture was the key factor. </span></p><p data-index="11"><span data-index="11">Besides, the researchers predicted the changes of SOC and STN stocks in global drylands under different climate scenarios. SOC and STN stocks were projected to decrease by 3.6% and 4.0% from 2020 to 2100, respectively, under the Representative Concentration Pathways (RCP) 4.5 scenario. Both SOC and STN stocks would further decrease under RCP 8.5 scenario.</span></p><p data-index="11"><span data-index="11">This study provides novel insights for soil carbon and nitrogen stocks in drylands, and can help formulate land management practices and climate mitigation policies.</span></p><p data-index="11"><span data-index="11">Article link: </span><a href="https://www.sciencedirect.com/science/article/pii/S0016706124003045" target="_self" data-index="11"><span data-index="11">https://www.sciencedirect.com/science/article/pii/S0016706124003045</span></a></p><p data-index="11" style="text-align: center;"><img src="./W020241106681198317896.png" width="600" height="573" alt="" style="font-family: arial, helvetica, sans-serif; font-size: 12px; margin-top: 5px; margin-bottom: 18px; line-height: 1.5em;" picname oldsrc="W020241106681198317896.png" data-index="11" uploadpic="W020241106681198317896.png" data-uploadpic="W020241106678052767997.png" needdownload="true" data-needdownload="true" /></p><p data-index="11" style="text-align: center;"><span style="color: rgb(127, 127, 127);">Spatial patterns of soil organic carbon (SOC) density (A, 0–100 cm) and soil total nitrogen (STN) density (B, 0–100 cm) and their stocks of different depths in drylands. (Image by XIEG)</span></p><p data-index="11"><br/></p><p data-index="11"><span data-index="11">Contact</span></p><p data-index="11"><span data-index="11">LONG Huaping</span></p><p data-index="11"><span data-index="11">Xinjiang Institute of Ecology and Geography</span></p><p data-index="11"><span data-index="11">E-mail: longhp@ms.xjb.ac.cn</span></p><p data-index="11"><span data-index="11">Web: http://english.egi.cas.cn</span></p></div></div></p></div> </div> <div class="detaildown mt20"> <dl> <dd> <ul> <li><a href="" target="_blank" title="" class="mt5"> </a></li> </ul> </dd> </dl> </div> </article> </div> </div> </div> <div class="clearfix"></div>   <footer> <div class="nav-btm clearfix"> <div class="container"> <section class="left"> <ul> <li><a href="http://english.egi.cas.cn/resources_25606/">Resources</a></li> <li><a href="http://english.egi.cas.cn/wechat/">Wechat</a></li> <li><a href="http://english.egi.cas.cn/about/contact/">Contact</a></li> <li><a href="http://english.egi.cas.cn/ls/">Links</a></li> </ul> </section> <section class="right"> <img src="//english.egi.cas.cn//images/ico_ewm_enegi.png" /> <img src="//english.egi.cas.cn//images/logo_cas_btm_enegi.png" /> </section> </div> </div> <div class="row container"> <div class="conac"><img src="http://dcs.conac.cn/image/blue.png" /></div> <div class="footer-m"> <p>Copyright ©<script>document.write((new Date()).getFullYear());</script> Xinjiang Institute of Ecology and Geography , Chinese Academy of Sciences </p> <p>Email: <a href="mailto:sds@ms.xjb.ac.cn">sds@ms.xjb.ac.cn</a>　Tel:+86-991-7885307　Address:818 South Beijing Road, Urumqi, Xinjiang </p> </div> </div> </footer>  <script src="//english.egi.cas.cn//images/jquery-1.12.4.min.js"></script> <script src="//english.egi.cas.cn//images/main.js"></script>  <script type="text/javascript"> function isValid(str){ if(str.indexOf('&') != -1 || str.indexOf('<') != -1 || str.indexOf('>') != -1 || str.indexOf('\'') != -1 || str.indexOf('\\') != -1 || str.indexOf('/') != -1 || str.indexOf('"') != -1 || str.indexOf('%') != -1 || str.indexOf('#') != -1){ return false; } return true; } $(function(){ $('#sub-pc').click(function(){ var searchword = $.trim($('#searchword').val()); if(searchword == "" || searchword == "Please enter keywords" || !isValid(searchword)){ alert("Please enter keywords"); return false; } $('input[name="keyword"]').val(encodeURI(searchword)); $('form[name="searchform"]').submit(); }); $('#sub-mobile').click(function(){ var iptSword = $.trim($('#iptSword').val()); if(iptSword == "" || iptSword == "Please enter keywords" || !isValid(iptSword)){ alert("Please enter keywords"); return false; } $('input[name="keyword"]').val(encodeURI(iptSword)); $('form[name="searchform"]').submit(); }); }); </script> <script> var docauthor = $("#author").text(); if(docauthor == "作者："){ $("#author").hide(); } var docsourcename = $("#source").text(); if(docsourcename == "来源："){ $("#source").hide(); } if(!$(".detaildown dd").height()>0){ $(".detaildown dt").hide(); } </script> </body> </html>

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Researchers Map Soil Organic Carbon and Soil Total Nitrogen in Global Drylands--Xinjiang Institute of Geography and Ecology, Chinese Academy of Sciences