期刊论文

Precipitation Isotopes Formed by Typhoon“Haima”in the Dongting Lake Basin

中文

地理科学

1000-0690

2019

39

7

1184-1190

10.13249/j.cnki.sgs.2019.07.017

2018JJ2009:湖南省自然科学基金 18B370:湖南省教育厅优秀青年项目 17D26:衡阳师范学院启动基金 HJ15K03:湖南省环境教育研究中心开放基金 HJ18K01:湖南省环境教育研究中心开放基金

本校为其他机构

基于2011年第4号台风“海马”登陆前后洞庭湖流域内长沙降水同位素资料,分析了降水同位素的变化特征以及水汽输送对降水同位素的影响。结果表明:台风“海马”在洞庭湖流域内长沙所形成降水的大气水线的斜率和截距均小于长沙夏季大气水线,这与根据同位素分馏理论做出的推测相吻合。台风天气系统影响下的流域降水δ~(18)O值为研究时段内的最低值,即降水同位素被显著贫化,而降水过量氘(deuterium excess,记为d)波动明显要小于其他时段,后者反映了形成台风降水的水汽来源较为单一。研究时段内长沙降水d指示台风降水前、台风降水中两个阶段水汽来源于西太平洋,水汽输送轨迹也印证了降水d所指示的水汽...

The variation characteristics of precipitation isotopes and the influence of moisture source on them are analyzed by using precipitation isotope data collected around the No. 4 typhoon, named‘Haima', in 2011 at Changsha, which located in the Dongting Lake Basin. The results show that both the slope and the intercept of meteoric water line produced by the typhoon precipitation are smaller than that of summer's at Changsha, which is consistent with water isotope fractionation theory. Significant deplete in heavy isotopes leads to lowest value of...