文献类型：期刊文献

中文题名：湛江地区汛期降水稳定同位素的变化与水汽来源的关系

英文题名：Relationship between variation of stable isotopes in precipitation and water vapor source of Zhanjiang in flood season

作者：甘秋莹[1];范伶俐[1];陈汉森[1];李丽芳[1];李俊宇[1];郑侦明[1]

机构：[1]广东海洋大学海洋与气象学院,广东湛江524088

年份：2021

卷号：41

期号：1

起止页码：129

中文期刊名：海洋气象学报

外文期刊名：Journal of Marine Meteorology

基金：国家重点研发计划“重大自然灾害监测预警与防范”重点专项(2018YFC1506002);广东海洋大学大学生省级创新训练型项目(CXXL2019044)。

语种：中文

中文关键词：降水;稳定同位素;水汽来源;HYSPLIT轨迹模式;湛江

外文关键词：precipitation;stable isotope;water vapor source;HYSPLIT model;Zhanjiang

中文摘要：以湛江降水为研究对象,利用收集的2019年汛期68个降水样品及同期气象资料,采用同位素示踪技术,结合HYSPLIT(Hybrid Single-Particle Lagrangian Integrated Trajectory)模式溯源,分析了湛江地区汛期降水稳定同位素的变化与水汽源地的关系,并对5个代表性的降水个例进行了诊断分析。结果表明:1)湛江地区汛期局部降水线为δD=8.023^(18)O-0.7037,R^(2)=0.954,n=68;前汛期季风带来西太平洋的水汽,^(18)O含量丰富;后汛期降雨主要取决于局部大气环流,一定程度受云下二次分馏影响,δD和^(18)O偏低。2)前汛期西南季风爆发前,湛江降水的水汽主要源于副热带高压外围东南气流输送的西太平洋水汽,西南季风爆发后,南海、孟加拉湾为其水汽源地;后汛期热带系统带来的降水,南海、孟加拉湾为主要水汽源地;非热带系统带来的降水,孟加拉湾为主要水汽源地。

外文摘要：The precipitation of Zhanjiang is analyzed through 68 precipitation samples and observational weather data collected in the flood season of 2019.The isotope tracing method and the Hybrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)model are used to analyze the relationship between the variations of stable isotopes in precipitation and the water vapor source of Zhanjiang in the flood season.Besides,5 representative precipitation cases are analyzed to find out the water vapor source of Zhanjiang in the flood season.The results are shown below.1)The local meteoric water line isδD=8.023^(18)O-0.7037(R^(2)=0.954,n=68)during the flood season in Zhanjiang;the monsoon in the early flood season brings water vapor from the western Pacific and the content of^(18)O is abundant;the rainfall in the latter flood season,which is mainly caused by local atmospheric circulation,is affected to some extent by second evaporation under the cloud,and the content ofδD and^(18)O is low.2)Before the onset of the southwest monsoon in the early flood season,the southeast airflow around the subtropical high brings the water vapor of the western Pacific to Zhanjiang;when the southwest monsoon erupts,the South China Sea and the Bay of Bengal become its water vapor sources;for the precipitation caused by tropical systems in the latter flood season,the South China Sea and the Bay of Bengal are the main water vapor sources of Zhanjiang;while for the precipitation caused by non-tropical systems,the Bay of Bengal is the main water vapor source.