Stable isotopic characteristics of precipitation in Lanzhou City and its surrounding areas, Northwest China

被引：22

作者：

Chen, Fenli ^{[1
]}

Zhang, Mingjun ^{[1
]}

Ma, Qian ^{[1
]}

Wang, Shengjie ^{[1
]}

Li, Xiaofei ^{[1
]}

Zhu, Xiaofan ^{[1
]}

机构：

[1] Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Peoples R China

来源：

ENVIRONMENTAL EARTH SCIENCES | 2015年 / 73卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Lanzhou; delta O-18; Precipitation; Secondary evaporation; WATER-BALANCE; GROUNDWATER RECHARGE; TIBETAN PLATEAU; AMAZON BASIN; DELTA-D; OXYGEN; MONSOON; HYDROGEN; MOISTURE; RIVER;

D O I：

10.1007/s12665-014-3776-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Based on the precipitation samples obtained at Lanzhou City (36A degrees 06'N, 103A degrees 44'E, 1,548 m a.s.l.) in western China and its surrounding counties (Yongdeng, Gaolan, and Yuzhong) from April 2011 to February 2013, the characteristics of stable isotopes in precipitation and the correlations between delta O-18 and meteorological factors were analyzed. The LMWL (local meteoric water line) of Lanzhou City and its surrounding areas was calculated, and the order of LMWL slopes in the four stations is Yuzhong (7.70) > Lanzhou (7.57) > Yongdeng (7.24) > Gaolan (6.80). Both the slope and intercept of the LMWLs for each station are less than those of the global meteoric water line. There is a weakly positive correlation between delta O-18 and air temperature, and the correlation between delta O-18 and precipitation amount is weakly negative. Evidenced from the slope and intercept of LMWL and the relationship between delta O-18 and relative humidity, there is secondary evaporation when the precipitation falls from clouds to the ground.

引用

页码：4671 / 4680

页数：10

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