CINXE.COM

<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>由强北大西洋纬向表面温度梯度驱动的黎凡特古干旱化及其与现代的相关性—小柯机器人—科学网</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="keywords" content=10.1073/pnas.2407166121,Proceedings of the National Academy of Sciences /> <link href="/AInews/css/css.css" rel="stylesheet" type="text/css" /> <style> a{color:#06c;} </style> <script type="text/javascript"> function browserRedirect() { var sUserAgent= navigator.userAgent.toLowerCase(); var bIsIpad= sUserAgent.match(/ipad/i) == "ipad"; var bIsIphoneOs= sUserAgent.match(/iphone os/i) == "iphone os"; var bIsMidp= sUserAgent.match(/midp/i) == "midp"; var bIsUc7= sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4"; var bIsUc= sUserAgent.match(/ucweb/i) == "ucweb"; var bIsAndroid= sUserAgent.match(/android/i) == "android"; var bIsCE= sUserAgent.match(/windows ce/i) == "windows ce"; var bIsWM= sUserAgent.match(/windows mobile/i) == "windows mobile"; if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) { document.write("<div style='padding-left:4em;text-align:center'><a href=\"http://wap.sciencenet.cn//mobile.php?type=AInews&op=detail&id=123762&mobile=1\" style='font-size:2em;color:#ba1413; line-height:2em;font-size:0.8em'>点击此处切换为手机版网页</a></div>"); } else { //window.location= '电脑网站地址'; } } browserRedirect(); </script> </head> <body> <div class="main"> <div id="wrapper">  <iframe src="https://blog.sciencenet.cn/plus.php?mod=iframelogin" style="width:990px; height:32px; " scrolling="no" frameborder="0"></iframe> <style> .logo *{margin:0; padding:0;} .logo img{border:0;} .logo{margin:0 auto; background: url(/images/logobg.gif) repeat-x left; height:84px; color:#FFF; width:990px;font: normal 13px Arial, Helvetica, Sans-Serif,"宋体";line-height: 160%;text-align:left;} .logo a{ color:#FFF;text-decoration:none;} .logo a:hover{color:#FFF ; text-decoration:underline;} .logo .lg{ float:left; width:231px; height:84px;} .logo .rg{ float:left; width:728px;margin:10px 0; border-bottom:1px solid #bd5354; padding-bottom:5px;} .logo .rg01{float:left; width:728px;font-size:13px; margin-top:8px;} .logo .rg01 .input01{ width:100px; height:20px; background:#FFF; margin-right:5px; border:1px solid #C00; line-height:20px;} .logo .rg01 .button01{ background:url(/images/button02.jpg) no-repeat ; width:58px; height:21px; border:0px; color:#FFF; font-size:12px; line-height:20px;} .rg02{ float:left; height:84px; width:728px; } </style> <div class="logo"> <div class="lg" ><a href="https://paper.sciencenet.cn/AInews/"><img src="/AInews/images/paper.png" width="231" height="84" alt="科学网论文频道" /></a></div> <div class="rg02" > <div class="rg" ><span style="float:left;"> <a href="https://www.sciencenet.cn/life/" style="color:#fff">生命科学</a> | <a href="https://www.sciencenet.cn/medicine/" style="color:#fff">医学科学</a> | <a href="https://www.sciencenet.cn/chemistry/" style="color:#fff">化学科学</a> | <a href="https://www.sciencenet.cn/material/" style="color:#fff">工程材料</a> | <a href="https://www.sciencenet.cn/information/" style="color:#fff">信息科学</a> | <a href="https://www.sciencenet.cn/earth/" style="color:#fff">地球科学</a> | <a href="https://www.sciencenet.cn/mathematics/" style="color:#fff">数理科学</a> | <a href="https://www.sciencenet.cn/policy/" style="color:#fff">管理综合</a> </span> <span style=" float:right; "> <a href="https://www.sciencenet.cn/upload/app/" style="color:#fff">移动客户端</a> | <a href="https://wap.sciencenet.cn/" style="color:#fff">手机版</a></span></div> <div class="rg01"><span style="float:left; "> <a href="https://www.sciencenet.cn/">首页</a> | <a href="https://news.sciencenet.cn/">新闻</a> | <a href="https://blog.sciencenet.cn/blog.php">博客</a> | <a href="https://news.sciencenet.cn/ys/">院士</a> | <a href="https://talent.sciencenet.cn/">人才</a> | <a href="https://meeting.sciencenet.cn">会议</a> | <a href="https://fund.sciencenet.cn/">基金·项目</a> | <a href="https://paper.sciencenet.cn/">论文</a> | <a href="https://blog.sciencenet.cn/blog.php?mod=video">视频·直播</a> | <a href="https://paper.sciencenet.cn/AInews">小柯机器人</a> | <a href="https://kxxsh.sciencenet.cn/">医学科普</a> </span> <div style="float:right; padding-left:0px;"> <form style="display:inline" method="get" action="https://www.baidu.com/baidu" accept-charset="utf-8" name="f1"> <input style=" width:100px;border:0" maxlength="40" size="31" name="word" /> <input type="submit" style="cursor:pointer; width:56px; font-size:12px; background-color:#880008; border-width:0px; height:16px; color:#fff;" value="本站搜索" /> <input type="hidden" value="2097152" name="ct" /> <input type="hidden" value="3" name="cl" /> <input type="hidden" value="paper.sciencenet.cn" name="si" /> <input type="hidden" value="utf-8" name="ie" /> </form> </div> </div></div> </div> <div class="main" style="clear:both"> <div class="weizhi"> <span class="wl">当前位置：<a href="http://www.sciencenet.cn">科学网首页</a> > <a href="http://news.sciencenet.cn/AInews/">小柯机器人</a> ><span class="red">详情</span></span> </div> <div class="details"> <div class="title2">由强北大西洋纬向表面温度梯度驱动的黎凡特古干旱化及其与现代的相关性</div> <div class="tagging">作者：<a href="/AInews/">小柯机器人</a> 发布时间：2024/11/13 21:03:46</div> <div class="dd"><div style='text-align:right'><a href="/Ainews/qikan.aspx?qid=1373">本期文章：《美国科学院院刊》：Online/在线发表</a></div></div> <p> <p> 美国哥伦比亚大学<error token="">Kushnir Yochanan小组报道了，强北大西洋纬向表面温度梯度驱动的黎凡特古干旱化及其与当今的相关性。2024年11月11日出版的《美国科学院院刊》杂志发表了这项成果。</error></p> <p> 据介绍，目前温室气体（GHG）导致地中海降雨量下降的机制仍存在争议。为了更好地理解当前和预测的干旱，课题组研究了晚第四纪东地中海（EM）黎凡特地区延长的干旱间隔，这表明在过去220万年的死海沉积物岩心中有大量的盐沉积。</p> <p> 这些干旱事件发生在间冰期，当时地球在北方秋季处于太阳近日点，以及在冰期—间冰期过渡期间，与冰盖融化有关。第四纪晚期实际日照变化强迫的气候模型表明，当地球在北方秋季最接近太阳时，北大西洋冬季纬向表面温度梯度加剧。因此，上空的中纬度北大西洋急流和温带风暴路径向极地移动，同时副热带的海平面气压上升。这些变化使地中海风暴路径减弱，整个流域的降雨量减少。</p> <p> 在冰期-间冰期过渡期间，来自大陆冰原的融水迫使北大西洋亚极区突然变冷。这也加强了纬向表面温度梯度，可能与地中海类似的大气响应和干旱有关。这一古气候情景与对应于当前和预估的EM温室气体干燥的气候变化有很强的相似性。因此，死海的晚第四纪古水文信息表明了北大西洋中心对外部作用力的重要响应，这导致了地中海的干燥，并与现代有关。</p> <p> <strong>附：英文原文</strong></p> <p> Title: Paleo aridity in the Levant driven by a strong North Atlantic latitudinal surface temperature gradient and present-day relevance</p> <p> Author: Kushnir, Yochanan, Stein, Mordechai, Biasutti, Michela, Kiro, Yael, Goldsmith, Yonaton, Goldstein, Steven L.</p> <p> Issue&Volume: 2024-11-11</p> <p> Abstract: The mechanisms underlying the current greenhouse gas (GHG) forced decline in Mediterranean rainfall remain a matter of debate. To inform our understanding of the current and projected drying, we examined extended arid intervals in the late Quaternary, Eastern Mediterranean (EM) Levant indicated by substantial salt deposits in a Dead Sea sediment core covering the past 220 kyr. These arid events occurred during interglacials, when the Earth was at perihelion to the sun in boreal fall and during glacial–interglacial transitions, associated with icesheet melting. Climate models forced with realistic late Quaternary insolation variations show that when the Earth is closest to the Sun in boreal fall, the North Atlantic latitudinal surface temperature gradient in the winter intensifies. In response, the overlying midlatitude North Atlantic jet stream and the extratropical storm track move poleward while sea-level pressure rises in the subtropics. These changes bring about a weakening of the Mediterranean storm track and a decline in rainfall over the entire basin. During glacial–interglacial transitions, meltwater from continental icesheets forced abrupt subpolar North Atlantic cooling. This also strengthened the latitudinal surface temperature gradient, likely causing similar atmospheric response and aridity in the Mediterranean. There is a strong resemblance between this paleoclimate scenario and the climatic changes corresponding to the present and projected GHG drying of the EM. Hence, the late Quaternary palaeohydrology of the Dead Sea indicates an important North Atlantic centered response to external forcing, which leads to Mediterranean drying and is relevant in the present.</p> <p> DOI: 10.1073/pnas.2407166121</p> <p> Source: <a href="https://www.pnas.org/doi/abs/10.1073/pnas.2407166121">https://www.pnas.org/doi/abs/10.1073/pnas.2407166121</a></p> </p> <div class="remarks">期刊信息</div> <div class="dd"><div> <strong>PNAS：</strong>《美国科学院院刊》，创刊于1914年。隶属于美国科学院，最新IF：12.779</div> <div> <strong>官方网址：</strong><a href="https://www.pnas.org/">https://www.pnas.org</a></div> <div> <strong>投稿链接：</strong><a href="https://www.pnascentral.org/cgi-bin/main.plex">https://www.pnascentral.org/cgi-bin/main.plex</a></div> </div> </div> </div> <style> #footer{ background:#890f0e; text-align:center; padding:10px; color:#FFF; font-size:12px;} #footer a{color:#FFF; font-size:12px;} </style> <div id="footer"><a href="http://www.sciencenet.cn/aboutus/" target="_blank">关于我们</a> | <a href="http://www.sciencenet.cn/shengming.aspx" target="_blank">网站声明</a> | <a href="http://www.sciencenet.cn/tiaokuang.aspx" target="_blank">服务条款</a> | <a href="http://www.sciencenet.cn/contact.aspx" target="_blank">联系方式</a> | <a href="http://www.sciencenet.cn/RSS.aspx">RSS</a> | <a href="mailto:jubao@stimes.cn">举报</a> | <a href="https://stimes.sciencenet.cn/">中国科学报社</a> <br> <a href="https://beian.miit.gov.cn" target="_blank" > 京ICP备07017567号-12 </a> 互联网新闻信息服务许可证10120230008  京公网安备 11010802032783<br>Copyright @ 2007-<script type="text/javascript">var Date22 = new Date();var year22 = Date22.getFullYear();document.write(year22);</script> 中国科学报社 All Rights Reserved<br> 地址：北京市海淀区中关村南一条乙三号  邮箱：blog@stimes.cn <br> <span style="display:none"> <script type="text/javascript"> var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://"); document.write(unescape("%3Cscript src='" + _bdhmProtocol + "hm.baidu.com/h.js%3Fcbf293a46e1e62385b889174378635f1' type='text/javascript'%3E%3C/script%3E")); </script> </span> </div> </div> </div> </div> </body> <script src="http://libs.baidu.com/jquery/1.11.1/jquery.min.js"></script> <script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script> <script> var url=encodeURIComponent(location.href); $.ajax({ type : "get", url : "http://wap.sciencenet.cn/api/jssdk.php?url="+url,//替换网址，xxx根据自己jssdk文件位置修改 dataType : "jsonp", jsonp: "callback", jsonpCallback:"success_jsonpCallback", success : function(data){ wx.config({ debug: false, 　　　　 appId: data.appId, 　　　　 timestamp: data.timestamp, 　　　　 nonceStr: data.nonceStr, 　　　　 signature: data.signature, 　　　　jsApiList: [ 　　"onMenuShareTimeline", //分享给好友　　"onMenuShareAppMessage", //分享到朋友圈　　"onMenuShareQQ", //分享到QQ 　　"onMenuShareWeibo" //分享到微博 ] }); }, error:function(data){ } }); wx.ready(function (){ var shareData = { title: '由强北大西洋纬向表面温度梯度驱动的黎凡特古干旱化及其与现代的相关性—小柯机器人—科学网', desc: '由强北大西洋纬向表面温度梯度驱动的黎凡特古干旱化及其与现代的相关性—小柯机器人—科学网',//这里请特别注意是要去除html link:location.href, imgUrl: 'http://news.sciencenet.cn/images/logo300.png' }; wx.onMenuShareAppMessage(shareData); wx.onMenuShareTimeline(shareData); wx.onMenuShareQQ(shareData); wx.onMenuShareWeibo(shareData); }); window.onload = function(){ if (typeof WeixinJSBridge == "undefined"){ if( document.addEventListener ){ document.addEventListener('MenuShareTimeline', WeiXinShareBtn, false); }else if (document.attachEvent){ document.attachEvent('MenuShareTimeline', WeiXinShareBtn); document.attachEvent('onMenuShareTimeline', WeiXinShareBtn); } }else{ //WeiXinShareBtn(); } }; </script> </html>