生态环境学报Issue(1)：101-105,5.
鹰潭地区大气降水中氢氧稳定同位素特征研究
Stable isotopes of hydrogen and oxygen in the precipitation of Yingtan
摘要
Abstract
The δD and δ18O composition in precipitation are closely related to local meteorological factors. Meanwhile, being the primary basis of the isotope hydrology, stable isotopes of hydrogen and oxygen composition can be applied in the study of water cycle, such as evaluating sources of water vapor, groundwater recharge, etc. In this study, stable isotopes of oxygen and hydrogen compositions of the precipitation in Yingtan area from April, 2012 to March, 2013 were investigated. According to the isotopes of precipitation, local meteoric water regression lines could be described as: δD=8.61δ18O+18.34 (n=72,R2=0.98). Its slope and intercept were higher than those of global meteoric water line (δD=8δ18O+10) due to the evaporation and enrichment of heavy isotopes condensation in the unsaturated atmosphere. Large ranges of δD (-113.3‰~7.5‰), δ18O (-14.9‰~-0.9‰) and dexcess values (3.8‰~23.2‰) were found in precipitation in this region, and the values of δD, δ18O and dexcess in the summer half year (April-September) were significantly lower than those in the winter half year (March-October) (P<0.01), indicating different evaporative conditions and atmospheric water vapor sources between the two seasons. The relationship between δ18O and precipitation amount, temperature could be described as y=-0.056x-4.7 (R2=0.39, P<0.01) and y=-0.203x-2.99 (R2=0.23, P<0.01), indicating the precipitation amount effect and anti-temperature effect of isotopes in precipitation respectively.关键词
氢氧稳定同位素/大气降水/降水量效应/氘盈余Key words
hydrogen and oxygen isotope/precipitation/precipitation amount effect/deuterium excess分类
天文与地球科学引用本文复制引用
沈业杰,彭新华..鹰潭地区大气降水中氢氧稳定同位素特征研究[J].生态环境学报,2014,(1):101-105,5.基金项目
“十二五”国家科技支撑项目（2011BAD31B04）；中科院“百人计划”项目 （）
