摘要
根据贵州安顺和重庆北碚2014年6月-11月大气降水中稳定同位素和气象资料,分析了两地降水中稳定同位素特征,结果表明:蒸发作用导致两地大气降水线方程的斜率和截距均偏大,重庆北碚因温度特异导致其偏离程度更大;贵州安顺地区降水中δ^(18)O的高程效应显著,但降水量效应较弱,而重庆北碚降水中δ^(18)O的大陆效应不明显,但降水量效应显著.d值是δD和δ^(18)O的因变量,而δD和δ^(18)O一定程度上受局地地形和气候影响,所以d值也受局地地形和气候影响,而非由水汽来源地单一因素决定.
The characteristics of stable isotopes of precipitation in Anshun,Guizhou and Beibei Chongqing were analyzed by the rainfall and meteorological data collected from June to November in 2014.The results show that evaporation cause bigger slope and intercept of two Local Meteoric Water Line（LMWL）equation,and the Chongqing area has a greater degree of deviation because of its positive temperature anomaly.The δ18O of precipitation in Anshun has a remarkable altitude effect but weak precipitation effect.In contrary,the δ18O of precipitation in Chongqing has weak continental effect but very significant precipitation effect.The d-excess is the dependent variable of δD and δ18O,which are influenced by local topography and climate condition in a certain extent.So,d-excess is influenced by not only the water vapor source but also the local terrain and climate.
作者
毛庆亚
王建力
王家录
李文
MAO Qing-ya WANG Jian-li WANG Jia-lu LI Wen(School of Geographical Sciences, Southwest University, Chongqing 400715, China School of Resources and Environmental Engineering, Anshun University, Anshun Guizhou 561000, China Key Laboratory of the Three Gorges Reservoir Region＇s Eco-Environment, Ministry of Education, Southwest University, Chongqing 400715, China Meteorological Bureau of Anshun City, Anshun Guizhou 561000, China)
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第2期114-120,共7页
Journal of Southwest University(Natural Science Edition)
基金
贵州省科技厅联合基金项目(黔科合J字LKA[2012]09号
黔科合J字LKA[2012]18号)
国家自然科学基金项目(41201565)
关键词
大气降水
氢氧同位素
特征分析
贵州安顺
重庆北碚
meteoric precipitation
hydrogen and oxygen stable isotopes
characteristic analysis
Anshun Guizhou
Beibei Chongqing
