亚洲中部干旱区降水同位素的GCM模拟（英文）

编号 zgly0001584771

文献类型 期刊论文

文献题名 亚洲中部干旱区降水同位素的GCM模拟（英文）

作者 王圣杰  张明军  陈粉丽  车彦军  杜铭霞  刘杨民 

作者单位 CollegeofGeographyandEnvironmentalScience  NorthwestNormalUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2015年07期

年份 2015 

分类号 P426.612 

关键词 GCM  isotopiccomposition  precipitation  centralAsia 

文摘内容 The isotope-equipped GCMs(general circulation models) are useful tools to investigate the isoscape in precipitation and water vapor, especially for the regions without enough in-situ observations. To study the spatial distribution and seasonal variation of precipitation isotopic composition in arid central Asia, several isotope-equipped GCMs are applied, and the long-term observations in two stations are used to verify the GCM-simulated results. Generally, seasonality of isotopic composition can be well simulated in each GCM, and the values of δ18O in precipitation are larger in summer months(from April to October) and lower in winter months(from November to March). Higher latitude usually shows lower values of δ18O in precipitation, and lower latitude has higher values. The values of δ18O are relatively low in the eastern section, and higher in the western section. Among these simulations, ECHAM is good at describing the isotopic composition in the study region, which can be seen from the mean absolute error(MAE) and root-mean-square error(RMSE). The ECHAM-derived values of δ18O in precipitation positively correlate with the observed series, and the correlation coefficient based on ECHAM is the largest among these GCMs.