|
|||||
|
|
| 西部降水氢氧稳定同位素温度及地理效应 | |
| 引用本文： | 黄天明,聂中青,袁利娟.西部降水氢氧稳定同位素温度及地理效应[J].干旱区资源与环境,2008,22(8). |
| 作者姓名： | 黄天明 聂中青 袁利娟 |
| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100029;兰州大学资源环境学院,兰州,730000 2. 兰州大学资源环境学院,兰州,730000 3. 中国科学院地质与地球物理研究所,北京,100029 |
| 基金项目： | 国家自然科学基金 , 中科院知识创新工程重要方向项目 |
| 摘 要： | 本文基于IAEA和WMO建立的GNIP网降水资料,得出中国西部地区大气降水线方程(LMWL)为δ2H=7.56δ18O+5.05‰(VSMOW)。分析了降水中氢氧稳定同位素温度效应、地理效应,确定了降水中δ18O和δ2H与月平均气温、降水量、海拔高度、纬度的相关关系。根据张掖站降水δ18O与温度之间的相关关系和民勤地下水14C年龄和δ18O特征,初步重建了晚更新世以来民勤盆地地下水补给温度,并与惰性气体补给温度(NGT)进行了比较,其相关系数为0.65,晚更新世地下水的补给温度(据δ-T关系)较大,可能是没有考虑降水量效应的缘故。 |
| 关 键 词： | 大气降水线 同位素效应 惰性气体温度 地下水补给温度 |
Temperature and Geographical Effects of Hydrogen and Oxygen Isotopes in Precipitation in West of China |
|
| HUANG Tian-ming,NIE Zhong-qing,YUAN Li-juan.Temperature and Geographical Effects of Hydrogen and Oxygen Isotopes in Precipitation in West of China[J].Journal of Arid Land Resources and Environment,2008,22(8). | |
| Authors: | HUANG Tian-ming NIE Zhong-qing YUAN Li-juan |
| Institution: | HUANG Tian-ming1,2,NIE Zhong-qing2,YUAN Li-juan1 |
| Abstract: | The Local Meteoric Water Line(LMWL) in the west of China is δ2H=7.56δ18O+5.05(‰ VSMOW)based on the data from GNIP database(IAEA and WMO).The Hydrogen and Oxygen Isotope Effect in this region was analyzed.The relationship between the δ18O and δ2H in precipitation and their effects(monthly temperature,precipitation,altitude,latitude) were calculated.The temperature effect is the most important effect for δ18O and δ2H in precipitation.The next important effect is amount precipitation.The relationship between the δ18O in precipitation and temperature in Zhangye Meteorological Station was also analyzed.According to this relationship,and 14C age and δ18O value in Minqin Basin,the palaeogroundwater recharge condition was reconstructed.The correlation coefficient between the palaeogroundwater recharge temperature using the above relationship and Noble gas recharge temperature(NGT) is 0.65 only,which is probably caused by amount effect. |
| Keywords: | meteoric water line isotope effect noble gas temperature groundwater recharge temperature |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |