期刊论文

中文

地理科学

1000-0690

2017

37

5

792-798

10.13249/j.cnki.sgs.2017.05.017

国家自然科学基金项目(41401019)

本校为其他机构

基于洞庭湖流域内长沙市2010年1月至2012年12月降水事件、GNIP(Global Network for Isotopes in Precipitation)长沙站1988~1992年月降水同位素资料及ENSO(厄尔尼诺/拉尼娜和南方涛动)的2个常用指标(南方涛动指数SOI和Nino3区海面温度SST),分析了流域降水同位素与ENSO关系。结果表明:洞庭湖流域降水中δ~(18)0与降水量、气温在日、月尺度上均呈负相关且只有月度上与降水量的负相关不显著。洞庭湖流域降水中δ~(18)0与ENSO的SST指标则呈显著正相关。ENSO对洞庭湖流域降水同位素的影响机制可能如下:春季,La Nina年源自西太平洋的东南风强盛,其转向为西南风的区域达到印度洋,而El Nino年,东南风转向...

In this study, the relationship between stable water isotopes in precipitation and ENSO is analyzed by using isotopic composition of water samples taken from individual precipitation events that covered a period of Jan. 2010 to Dec. 2012 and International Atomic Energy Agency Global Network for Isotopes in Precipitation(GNIP) data set in Changsha, which located in Dongting Lake Basin. The results show that monthly precipitation δ~(18)0 have significant negative correlation with precipitation amount and temperature both at daily and monthly sca...