中国岩溶2012，Vol.31Issue(3)：253-258,6.
四川黄龙降水氢、氧同位素对气候变化的指示意义
Indications of the hydrogen and oxygen isotopes in precipitation for climate change in Huanglong, Sichuan
摘要
Abstract
The slope and constant of the meteoric water line in Huanglong are both smaller than the global meteoric water line, which is related to the evaporation enrichment of heavy isotopes as raindrops fall in un-saturated atmosphere, and the climate in Huanglong has been getting warmer and drier in the recent decades. The notable amount effect of the isotopes in precipitation illustrates the vapor in Huanglong precipitation is mainly from low latitude ocean. The seasonal variation in the excess deuterium and the amount effect of the hydrogen and oxygen isotopes in precipitation reflect slight precipitation and strong evaporation and thus strong enrichment of heavy isotopes in dry season of Huanglong with the dry air for being influenced by continental air mass. It is influenced by low latitude marine vapor with moist air, heavy precipitation and slight evaporation in rainy season, so the enrichment of heavy isotopes is slight and the rainfall is characterized with low stable isotopic ratio. Therefore, it can be deduced that the amount effect of the isotopes in precipitation is resulted by the difference in vapor origin; the temperature effect is not notable in Huanglong where the monsoon climate effect restrained and covered up the temperature effect.关键词
降水/氢、氧同位素/过剩氘/气候变化/四川黄龙Key words
precipitation/hydrogen and oxygen isotopes/excessed deuterium/climate change/Huanglong, Sichuan分类
天文与地球科学引用本文复制引用
王海静,张金流,刘再华..四川黄龙降水氢、氧同位素对气候变化的指示意义[J].中国岩溶,2012,31(3):253-258,6.基金项目
中国科学院百人计划项目(编号:2006-067)和国家自然科学基金项目(编号:40872168) （编号:2006-067）
