| 东亚水循环中水稳定同位素的GCM模拟和相互比较 |
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| 引用本文： | 章新平,孙治安,关华德,张新主,吴华武,黄一民.东亚水循环中水稳定同位素的GCM模拟和相互比较[J].冰川冻土,2011,33(6):1274-1285. |
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| 作者姓名： | 章新平 孙治安 关华德 张新主 吴华武 黄一民 |
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| 作者单位： | 湖南师范大学;湖南师范大学;湖南师范大学;湖南师范大学 |
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| 基金项目： | 国家自然科学基金项目(41171035;40871094));湖南省重点学科项目(201101);中国科学院青藏高原环境变化与地表过程重点实验室开放基金项目(2011004)资助 |
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| 摘 要： | 利用引入稳定同位素循环的ECHAM4、GISS E和HadCM3模式的模拟,对东亚降水中年平均δD和过量氘d的空间分布以及大气水线（MWL）进行了分析.根据模拟的空间分布,降水同位素在很大程度上反映不同气团的地理背景以及它们之间的相互作用,模拟结果很好地再现了由GNIP实测资料得到的降水稳定同位素的纬度效应、大陆效应和...
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| 关 键 词： | GCM GNIP 稳定同位素 过量氘 大气水线 |
GCM Simulation of Stable Water Isotopes in Water Cycle and Intercomparisons over East Asia |
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| ZHANG Xin-ping,SUN Zhi-an,GUAN Hua-de,ZHANG Xin-zhu,WU Hua-wu,HUANG Yi-min.GCM Simulation of Stable Water Isotopes in Water Cycle and Intercomparisons over East Asia[J].Journal of Glaciology and Geocryology,2011,33(6):1274-1285. |
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| Authors: | ZHANG Xin-ping SUN Zhi-an GUAN Hua-de ZHANG Xin-zhu WU Hua-wu HUANG Yi-min |
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| Institution: | 1 (1.College of Resources and Environmental Sciences,Hunan Normal University,Changsha Hunan 410081,China; 2.Centre for Australian Weather and Climate Research,Melbourne 3001,AU;3 School of the Environment, National Centre for Groundwater Research and Training,Flinders University,Adelaide 5001,AU) |
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| Abstract: | In this paper,the performance of three selected isotope incorporated GCMs,ECHAM4,GISS E and HadCM3 are examined by comparing the model results with GNIP observations.The spatial distribution of mean annual δD and mean annual deuterium excess d in precipitation,and the relationship between δ18O and δD in precipitation,are compared between GCMs and GNIP data over East Asia.Overall,the three GCMs reproduce major characteristics of δD in precipitation as observed by GNIP.The simulated d distributions are less consistent with the GNIP results.This may indicate that kinetic fractionation processes are not appropriately represented in the isotopic schemes of GCMs.The GCM modeled MWL slopes are close to the GNIP derived MWL,but the simulated MWL intercepts significantly overestimate the GNIP one.This supports that the three isotope incorporated GCMs may not represent the kinetic fractionation processes well.In term of LMWLs,the simulated LMWL slopes are similar to those from GNIP observations,but slightly overestimate for most locations.Some isotopic functions(especially those related to kinetic fractionation) and their parameterizations in GCMs may have caused the discrepancy between the simulated and GNIP observed results.Future work is recommended to improve isotopic function parameterization on the basis of the high-resolution isotope observations. |
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| Keywords: | GCM GNIP stable isotope deuterium excess meteoric water line |
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