庞洪喜教授课题组在水汽同位素暴雨过程示踪研究中取得新进展

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>庞洪喜教授课题组在水汽同位素暴雨过程示踪研究中取得新进展</title> <meta name="description" content="暴雨是东亚地区最严重的气象灾害之一，给人类生命安全和社会经济发展等带来了极大的威胁。通过对暴雨事件发生机制的研究进而准确的提供天气预报，不仅具有重要的科学意义，也具有重大的社会经济效益。丰沛的水汽供应及有利的天气系统是暴雨形成的两个重要条件。然而，由于对暴雨期间复杂的水汽来源及传输路径、不同尺度天气系统相互作用过程等认识不足，暴雨的准确预报仍面临巨大挑战。作为水循环的天然示踪剂，大气水汽稳定同位素对不同来源水汽及不同尺度天气系统具有较好的指示作用。但过去由于缺少长时间高分辨率水汽稳定同位素观测，利用水汽稳定同位素手段对暴雨过程的系统研究还未开展。针对这一问题，庞洪喜教授课题组基于南京大学地球系统区域过程综合观测试验基地（SORPES）长时间连续高分辨率水汽稳定同位素观测资料，结合地面气象观测、卫星观测资料、再分析资料等，系统分析了东亚地区暴雨过程中水汽同位素变化特征及其揭示的暴雨形成机制。研究发现，在不同天气系统的影响下，水汽稳定同位素值呈4种变化模式，包括缓慢下降型（台风与中高纬度系统相互作用，图1a）、W型（台风本体，图1b）、U型（冷涡，图1c）和L型（高空槽，图1d）。通过分析" /> <link type="text/css" href="/_css/_system/system.css" rel="stylesheet"/> <link type="text/css" href="/_upload/site/1/style/49/49.css" rel="stylesheet"/> <link type="text/css" href="/_upload/site/01/23/291/style/177/177.css" rel="stylesheet"/> <link type="text/css" href="/_js/_portletPlugs/simpleNews/css/simplenews.css" rel="stylesheet" /> <link type="text/css" href="/_js/_portletPlugs/datepicker/css/datepicker.css" rel="stylesheet" /> <link type="text/css" href="/_js/_portletPlugs/sudyNavi/css/sudyNav.css" rel="stylesheet" /> <script language="javascript" src="/_js/jquery.min.js" sudy-wp-context="" sudy-wp-siteId="291"></script> <script language="javascript" src="/_js/jquery.sudy.wp.visitcount.js"></script> <script type="text/javascript" src="/_js/_portletPlugs/datepicker/js/jquery.datepicker.js"></script> <script type="text/javascript" src="/_js/_portletPlugs/datepicker/js/datepicker_lang_HK.js"></script> <script type="text/javascript" src="/_js/_portletPlugs/sudyNavi/jquery.sudyNav.js"></script> <link rel="stylesheet" href="/_upload/tpl/02/3f/575/template575/style.css" type="text/css" media="all" /> <link rel="stylesheet" href="/_upload/tpl/02/3f/575/template575/css/style.css" type="text/css" media="all" /> <script src="/_upload/tpl/02/3f/575/template575/extends/extends.js"></script> </head> <body> <div class="wrapper" id="header"> <div class="inner"> <div class="head" frag="面板1"> <div class="en"><div frag="窗口111"><div id="wp_nav_w111"> <ul class="wp_nav" data-nav-config="{drop_v: 'down', drop_w: 'right', dir: 'y', opacity_main: '1', opacity_sub: '0.8', dWidth: '0'}"> <li class="nav-item i1 "> <a href="https://cms.nju.edu.cn/njdx/front/s205/" title="English" target="_blank">English</a> </li> </ul> </div></div></div> <div class="ss" frag="窗口1"> <form method="POST" action="/_web/search/doSearch.do?_p=YXM9MjYxJnQ9NDc1JmQ9MjE2MCZwPTEmbT1OJg__" target="_blank" onsubmit="if ($('#keyword').val() === '搜索') { $('#keyword').val(''); }"> <div class="wp_search"> <table> <tbody> <tr> <td height="25px"><input id="keyword" name="keyword" style="width: 150px" class="keyword" type="text" value="搜索" onfocus="if (this.value === '搜索') { this.value = ''; }" onblur="if (this.value === '') { this.value = '搜索'; }"></td> <td><input name="btnsearch" class="search" type="submit" value=""></td> </tr> </tbody> </table> </div> </form> </div> </div> <div class="navbar" frag="面板2"> <div class="navbox" frag="窗口2"> <div id="wp_nav_w2"> <ul class="wp_nav" data-nav-config="{drop_v: 'down', drop_w: 'right', dir: 'y', opacity_main: '1', opacity_sub: '0.8', dWidth: '0'}"> <li class="nav-item i1 "> <a href="/main.psp" title="首页" target="_self">首页</a> </li> <li class="nav-item i2 "> <a href="/8374/list.htm" title="学院概况" target="_self">学院概况</a> <ul class="sub-nav"> <li class="nav-item i2-1 "> <a href="/8383/list.htm" title="学院简介" target="_self">学院简介</a> </li> <li class="nav-item i2-2 "> <a href="/8384/list.htm" title="历史沿革" target="_self">历史沿革</a> </li> <li class="nav-item i2-3 "> <a href="/8386/list.htm" title="教学委员会" target="_self">教学委员会</a> </li> <li class="nav-item i2-4 "> <a href="/8387/list.htm" title="学术委员会" target="_self">学术委员会</a> </li> <li class="nav-item i2-5 "> <a href="/8388/list.htm" title="学位委员会" target="_self">学位委员会</a> </li> </ul> </li> <li class="nav-item i3 "> <a href="/8375/list.htm" title="学科介绍" target="_self">学科介绍</a> <ul class="sub-nav"> <li class="nav-item i3-1 "> <a href="/8389/list.htm" title="学科建设" target="_self">学科建设</a> </li> <li class="nav-item i3-2 "> <a href="/8390/list.htm" title="自然地理学系" target="_self">自然地理学系</a> </li> <li class="nav-item i3-3 "> <a href="/8391/list.htm" title="国土资源与旅游学系" target="_self">国土资源与旅游学系</a> </li> <li class="nav-item i3-4 "> <a href="/8392/list.htm" title="地理信息科学系" target="_self">地理信息科学系</a> </li> <li class="nav-item i3-5 "> <a href="/8393/list.htm" title="海岸海洋科学系" target="_self">海岸海洋科学系</a> </li> </ul> </li> <li class="nav-item i4 "> <a href="/8376/list.htm" title="机构设置" target="_self">机构设置</a> <ul class="sub-nav"> <li class="nav-item i4-1 "> <a href="/8394/list.htm" title="党政机构" target="_self">党政机构</a> </li> <li class="nav-item i4-2 "> <a href="/8395/list.htm" title="各系机构" target="_self">各系机构</a> </li> </ul> </li> <li class="nav-item i5 "> <a href="/8377/list.htm" title="师资力量" target="_self">师资力量</a> <ul class="sub-nav"> <li class="nav-item i5-1 "> <a href="/8396/list.htm" title="学院英才" target="_self">学院英才</a> </li> <li class="nav-item i5-2 "> <a href="/szdw/list.htm" title="教师简介" target="_self">教师简介</a> </li> </ul> </li> <li class="nav-item i6 "> <a href="/8378/list.htm" title="本科生培养" target="_self">本科生培养</a> <ul class="sub-nav"> <li class="nav-item i6-1 "> <a href="/8398/list.htm" title="专业设置" target="_self">专业设置</a> </li> <li class="nav-item i6-2 "> <a href="/8399/list.htm" title="教学与培养方案" target="_self">教学与培养方案</a> </li> <li class="nav-item i6-3 "> <a href="/8400/list.htm" title="出版教材" target="_self">出版教材</a> </li> <li class="nav-item i6-4 "> <a href="/8402/list.htm" title="优质课程" target="_self">优质课程</a> </li> <li class="nav-item i6-5 "> <a href="/8403/list.htm" title="实践教学" target="_self">实践教学</a> </li> <li class="nav-item i6-6 "> <a href="/8404/list.htm" title="教学平台" target="_self">教学平台</a> </li> <li class="nav-item i6-7 "> <a href="/8401/list.htm" title="教学奖励" target="_self">教学奖励</a> </li> </ul> </li> <li class="nav-item i7 "> <a href="/8379/list.htm" title="研究生培养" target="_self">研究生培养</a> <ul class="sub-nav"> <li class="nav-item i7-1 "> <a href="/8405/list.htm" title="专业设置" target="_self">专业设置</a> </li> <li class="nav-item i7-2 "> <a href="/8406/list.htm" title="教学与培养方案" target="_self">教学与培养方案</a> </li> <li class="nav-item i7-3 "> <a href="/9785/list.htm" title="招生信息" target="_self">招生信息</a> <ul class="sub-nav"> <li class="nav-item i7-3-1 "> <a href="/9787/list.htm" title="硕士生" target="_self">硕士生</a> </li> <li class="nav-item i7-3-2 "> <a href="/9788/list.htm" title="博士生" target="_self">博士生</a> </li> </ul> </li> <li class="nav-item i7-4 "> <a href="/9786/list.htm" title="学位管理" target="_self">学位管理</a> <ul class="sub-nav"> <li class="nav-item i7-4-1 "> <a href="/9789/list.htm" title="硕士生" target="_self">硕士生</a> </li> <li class="nav-item i7-4-2 "> <a href="/9790/list.htm" title="博士生" target="_self">博士生</a> </li> </ul> </li> </ul> </li> <li class="nav-item i8 "> <a href="/8380/list.htm" title="科学研究" target="_self">科学研究</a> <ul class="sub-nav"> <li class="nav-item i8-1 "> <a href="/8407/list.htm" title="科研平台" target="_self">科研平台</a> <ul class="sub-nav"> <li class="nav-item i8-1-1 "> <a href="/9778/list.htm" title="2011计划" target="_self">2011计划</a> </li> <li class="nav-item i8-1-2 "> <a href="/9779/list.htm" title="省部级实验室" target="_self">省部级实验室</a> </li> <li class="nav-item i8-1-3 "> <a href="/9780/list.htm" title="省部级工程中心" target="_self">省部级工程中心</a> </li> <li class="nav-item i8-1-4 "> <a href="/9781/list.htm" title="省部级研究基地" target="_self">省部级研究基地</a> </li> <li class="nav-item i8-1-5 "> <a href="/9782/list.htm" title="研究所/中心" target="_self">研究所/中心</a> </li> </ul> </li> <li class="nav-item i8-2 "> <a href="/8408/list.htm" title="科研项目" target="_self">科研项目</a> </li> <li class="nav-item i8-3 "> <a href="/8409/list.htm" title="重要论文" target="_self">重要论文</a> </li> <li class="nav-item i8-4 "> <a href="/8410/list.htm" title="科研获奖" target="_self">科研获奖</a> </li> <li class="nav-item i8-5 "> <a href="/8411/list.htm" title="科研团队" target="_self">科研团队</a> </li> <li class="nav-item i8-6 "> <a href="/9783/list.htm" title="挂靠学会" target="_self">挂靠学会</a> </li> <li class="nav-item i8-7 "> <a href="/9784/list.htm" title="学术活动" target="_self">学术活动</a> </li> </ul> </li> <li class="nav-item i9 "> <a href="/8382/list.htm" title="学生工作" target="_self">学生工作</a> <ul class="sub-nav"> <li class="nav-item i9-1 "> <a href="/8414/list.htm" title="团队构成" target="_self">团队构成</a> <ul class="sub-nav"> <li class="nav-item i9-1-1 "> <a href="/8424/list.htm" title="研究生会" target="_self">研究生会</a> </li> <li class="nav-item i9-1-2 "> <a href="/8423/list.htm" title="本科学生会" target="_self">本科学生会</a> </li> <li class="nav-item i9-1-3 "> <a href="/8422/list.htm" title="地理学院团委" target="_self">地理学院团委</a> </li> <li class="nav-item i9-1-4 "> <a href="/8421/list.htm" title="学生工作办公室" target="_self">学生工作办公室</a> </li> </ul> </li> <li class="nav-item i9-2 "> <a href="/9791/list.htm" title="本科招生" target="_self">本科招生</a> <ul class="sub-nav"> <li class="nav-item i9-2-1 "> <a href="/9798/list.htm" title="专业简介" target="_self">专业简介</a> </li> <li class="nav-item i9-2-2 "> <a href="/9799/list.htm" title="人才培养" target="_self">人才培养</a> </li> <li class="nav-item i9-2-3 "> <a href="/9800/list.htm" title="精品课程" target="_self">精品课程</a> </li> <li class="nav-item i9-2-4 "> <a href="/9801/list.htm" title="主要去向" target="_self">主要去向</a> </li> <li class="nav-item i9-2-5 "> <a href="/9802/list.htm" title="知名院友" target="_self">知名院友</a> </li> <li class="nav-item i9-2-6 "> <a href="/9803/list.htm" title="优秀学生夏令营" target="_self">优秀学生夏令营</a> </li> </ul> </li> <li class="nav-item i9-3 "> <a href="/9792/list.htm" title="创业就业" target="_self">创业就业</a> <ul class="sub-nav"> <li class="nav-item i9-3-1 "> <a href="/9804/list.htm" title="就业工作" target="_self">就业工作</a> </li> <li class="nav-item i9-3-2 "> <a href="/9805/list.htm" title="实习去向" target="_self">实习去向</a> </li> </ul> </li> <li class="nav-item i9-4 "> <a href="/9793/list.htm" title="党建团建" target="_self">党建团建</a> <ul class="sub-nav"> <li class="nav-item i9-4-1 "> <a href="/9806/list.htm" title="党建工作" target="_self">党建工作</a> </li> <li class="nav-item i9-4-2 "> <a href="/9807/list.htm" title="发展转正" target="_self">发展转正</a> </li> <li class="nav-item i9-4-3 "> <a href="/9808/list.htm" title="支部建设" target="_self">支部建设</a> </li> <li class="nav-item i9-4-4 "> <a href="/9809/list.htm" title="主题党日" target="_self">主题党日</a> </li> <li class="nav-item i9-4-5 "> <a href="/9810/list.htm" title="团建工作" target="_self">团建工作</a> </li> </ul> </li> <li class="nav-item i9-5 "> <a href="/9794/list.htm" title="学生活动" target="_self">学生活动</a> <ul class="sub-nav"> <li class="nav-item i9-5-1 "> <a href="/9811/list.htm" title="团队构成" target="_self">团队构成</a> </li> <li class="nav-item i9-5-2 "> <a href="/9812/list.htm" title="活动风采" target="_self">活动风采</a> </li> </ul> </li> <li class="nav-item i9-6 "> <a href="/9795/list.htm" title="评优评奖" target="_self">评优评奖</a> <ul class="sub-nav"> <li class="nav-item i9-6-1 "> <a href="/9813/list.htm" title="评选通知" target="_self">评选通知</a> </li> <li class="nav-item i9-6-2 "> <a href="/9814/list.htm" title="荣誉通知" target="_self">荣誉通知</a> </li> </ul> </li> <li class="nav-item i9-7 "> <a href="/9796/list.htm" title="资助育人" target="_self">资助育人</a> </li> <li class="nav-item i9-8 "> <a href="/9797/list.htm" title="校友交流" target="_self">校友交流</a> <ul class="sub-nav"> <li class="nav-item i9-8-1 "> <a href="/9815/list.htm" title="毕业照" target="_self">毕业照</a> </li> <li class="nav-item i9-8-2 "> <a href="/9816/list.htm" title="毕业季" target="_self">毕业季</a> </li> <li class="nav-item i9-8-3 "> <a href="/9817/list.htm" title="返校交流" target="_self">返校交流</a> </li> </ul> </li> </ul> </li> <li class="nav-item i10 "> <a href="/cpyc/list.htm" title="诚聘英才" target="_self">诚聘英才</a> </li> </ul> </div> </div> </div> </div> </div> <div class="wrapper" id="jumbotran"> <div class="inner"> <div class="jumbotran" frag="面板7"> <div class="jumbotran-box" frag="窗口7">  </div> </div> </div> </div> <div class="wrapper" id="info"> <div class="inner"> <div class="infobox" frag="面板3"> <div class="info-position" frag="窗口30"> </div> <div class="article" frag="窗口3" portletmode="simpleArticleAttri"> <h1 class="arti_title">庞洪喜教授课题组在水汽同位素暴雨过程示踪研究中取得新进展</h1> 发布者：施晓冬发布时间：2024-11-22浏览次数：10 <div class="entry"> <div class="read"><div class='wp_articlecontent'><style type="text/css"> </style><a name="_GoBack"></a>暴雨是东亚地区最严重的气象灾害之一，给人类生命安全和社会经济发展等带来了极大的威胁。通过对暴雨事件发生机制的研究进而准确的提供天气预报，不仅具有重要的科学意义，也具有重大的社会经济效益。丰沛的水汽供应及有利的天气系统是暴雨形成的两个重要条件。然而，由于对暴雨期间复杂的水汽来源及传输路径、不同尺度天气系统相互作用过程等认识不足，暴雨的准确预报仍面临巨大挑战。作为水循环的天然示踪剂，大气水汽稳定同位素对不同来源水汽及不同尺度天气系统具有较好的指示作用。但过去由于缺少长时间高分辨率水汽稳定同位素观测，利用水汽稳定同位素手段对暴雨过程的系统研究还未开展。针对这一问题，庞洪喜教授课题组基于南京大学地球系统区域过程综合观测试验基地（SORPES）长时间连续高分辨率水汽稳定同位素观测资料，结合地面气象观测、卫星观测资料、再分析资料等，系统分析了东亚地区暴雨过程中水汽同位素变化特征及其揭示的暴雨形成机制。研究发现，在不同天气系统的影响下，水汽稳定同位素值呈4种变化模式，包括缓慢下降型（台风与中高纬度系统相互作用，图1a）、W型（台风本体，图1b）、U型（冷涡，图1c）和L型（高空槽，图1d）。通过分析稳定同位素演化特征（图1）、后向轨迹模拟结果（图2）及瑞利分馏模型计算结果（图3），发现中国东部的暴雨事件主要由邻近海洋（包括南海和东海）和陆地环境的水汽维持，印度洋远源水汽的贡献相对较弱。基于稳定同位素演化特征（图4）、850hPa风场和相当黑体温度（图5）的综合分析，发现暴雨过程的间歇期对应了低层天气系统强度变化或整体转换导致的近海水汽输送改变。此外，本研究首次提出，分析大气水汽同位素水线斜率的变化可为暴雨事件预报提供前兆信号（图6）。上述认识对于深入理解东亚地区暴雨事件发生机理具有重要意义，为使用水汽稳定同位素示踪东亚暴雨过程提供了基准。研究成果以“Monitoring Heavy Rainfall Events in East Asia Using High-Resolution Isotopic Observations”为题发表在Journal of Geophysical Research: Atmospheres上（https://doi.org/10.1029/2024JD041783）。论文的第一作者为南京大学地理与海洋科学学院许涛助理研究员，庞洪喜教授为论文通讯作者。该项研究得到国家自然科学基金项目（42271019, 41830644, 42021001）、国家重点研发计划项目（2023YFF0805300）、南京大学关键地球物质循环前沿科学中心项目（020914380103, 020914380117）及江苏省优势学科项目等联合资助。 <img src="/_upload/article/images/2a/f8/df1b33de4bcaa4b660aff185cc6f/48c6f183-61f8-4c56-a3e5-69ae8a3b1ca4.jpg" align="BOTTOM" width="575" height="722" border="0" />图1 暴雨事件的水汽稳定同位素组成和气象要素的变化特征<img src="/_upload/article/images/2a/f8/df1b33de4bcaa4b660aff185cc6f/760b7d7b-6ac2-4845-8432-5fb02c4a87e1.jpg" align="BOTTOM" width="554" height="393" border="0" />图2 暴雨事件168小时后向轨迹模拟结果<img src="/_upload/article/images/2a/f8/df1b33de4bcaa4b660aff185cc6f/6190a33c-e7aa-45ac-8379-1ae870470785.jpg" align="BOTTOM" width="554" height="382" border="0" />图3 瑞利分馏过程中来自南海及印度洋的水汽稳定同位素值演化特征<img src="/_upload/article/images/2a/f8/df1b33de4bcaa4b660aff185cc6f/417dc78f-1eb6-4ead-993f-0a4383ea005a.jpg" align="BOTTOM" width="554" height="522" border="0" />图4 不同天气系统及其相互作用和水汽稳定同位素演化示意图<img src="/_upload/article/images/2a/f8/df1b33de4bcaa4b660aff185cc6f/7497bd6f-e3b6-495a-b985-ad73c178e834.png" align="BOTTOM" width="532" height="885" border="0" />图5 暴雨间歇前后850 hPa风场（风向杆）及相当黑体温度（填色）<img src="/_upload/article/images/2a/f8/df1b33de4bcaa4b660aff185cc6f/1aea35ee-e375-4e91-a6f7-b7b36f8516c1.jpg" align="BOTTOM" width="554" height="449" border="0" />图6 正常天气、暴雨期间第一个降水峰值前和降水峰值时的大气水汽同位素水线斜率变化 </div></div> </div> </div> </div> </div> </div> <div class="wrapper" id="footer"> <div class="inner"> <div class="foot clearfix"> 版权所有：南京大学地理与海洋科学学院Copyright © All Rights Reserverd 通讯地址：南京市栖霞区仙林大道163号地理与海洋科学学院（昆山楼）邮编：210023<div frag="面板10" class="ft-right"> <div frag="窗口10"> <div id="wp_nav_w10"> <ul class="wp_nav" data-nav-config="{drop_v: 'down', drop_w: 'right', dir: 'y', opacity_main: '1', opacity_sub: '0.8', dWidth: '0'}"> <li class="nav-item i1 "> <a href="http://jwglsgos.nju.edu.cn/_web/_plugs/nanda/seatManagement.jsp" title="机位后台" target="_self">机位后台</a> </li> <li class="nav-item i2 "> <a href="https://webplus.nju.edu.cn" title="后台管理" target="_self">后台管理</a> </li> </ul> </div> </div> </div> </div> </div> </div> </body> </html> <img src="/_visitcount?siteId=291&type=3&articleId=725853" style="display:none" width="0" height="0"></image>

CINXE.COM

庞洪喜教授课题组在水汽同位素暴雨过程示踪研究中取得新进展