气候变化领域集成服务门户(CCPortal): An overview of precipitation isotopes over the Extensive Hexi Region in NW China

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DOI	10.1007/s12517-014-1521-9
	An overview of precipitation isotopes over the Extensive Hexi Region in NW China
	Guo, Xiaoyan; Feng, Qi; Wei, Yongping; Li, Zongxing; Liu, Wei
发表日期	2015
ISSN	1866-7511
EISSN	1866-7538
卷号	8 期号:7
英文摘要	Until now, most studies of the isotopic composition of precipitation in the Extensive Hexi Region have described individual sites. A systematic study considering the regional atmospheric circulation, the complex topography, and the reevaporation process is lacking. This paper compares and summarizes previous studies in the Extensive Hexi Region, to provide a regional picture of the characteristics of isotopic composition of precipitation and moisture sources. delta O-18 and delta D values exhibit significant seasonal variability, with higher values in summer and lower values in winter due to the seasonality of temperature and moisture sources. The temperature effect is more pronounced in the Extensive Hexi Region than in northwest China. The altitude effects are also evident with a gradient of -0.23 parts per thousand/100 m for delta O-18 and -1.67 parts per thousand/100 m for delta D. But, the d-excess increases gradually with altitude, and the higher d-excess values occur at mountain sampling sites which are attributed to the difference of the secondary evaporation between mountains and plain. Finally, the moisture source in the study area was investigated, and the results show relatively complex patterns: the westerly and polar air masses dominate in winter; however, there are inconsistent results in summer. Whether or not the westerly air mass is the dominant supply of moisture in summer is yet to be determined. Additionally, in the course of reviewing and integrating, some new research questions are identified for future work.
关键词	Extensive Hexi Corridor Precipitation Stable isotope d-excess Moisture sources
学科领域	Geology
语种	英语
WOS研究方向	Geosciences, Multidisciplinary
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111807
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Guo, Xiaoyan,Feng, Qi,Wei, Yongping,et al. An overview of precipitation isotopes over the Extensive Hexi Region in NW China[J]. 中国科学院西北生态环境资源研究院,2015,8(7).
APA	Guo, Xiaoyan,Feng, Qi,Wei, Yongping,Li, Zongxing,&Liu, Wei.(2015).An overview of precipitation isotopes over the Extensive Hexi Region in NW China.ARABIAN JOURNAL OF GEOSCIENCES,8(7).
MLA	Guo, Xiaoyan,et al."An overview of precipitation isotopes over the Extensive Hexi Region in NW China".ARABIAN JOURNAL OF GEOSCIENCES 8.7(2015).