干旱区生态环境知识资源中心(Arid): 柴达木盆地东部降水氢氧同位素特征与水汽来源

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	柴达木盆地东部降水氢氧同位素特征与水汽来源
其他题名	Hydrogen and Oxygen Isotopic Compositions of Precipitation and Its Water Vapor Sources in Eastern Qaidam Basin
	朱建佳 1; 陈辉 1; 巩国丽 2
来源期刊	环境科学
ISSN	0250-3301
出版年	2015
卷号	36 期号:8 页码:2784-2790
中文摘要	稳定性氢氧同位素可以作为示踪剂来判断大气降水的水汽来源.本研究选择柴达木盆地南部的格尔木和东北部的德令哈两个区域,在分析这两个地区2010年6~9月降水同位素组成特征、时间变化以及降水中deltaD与delta~(18)O关系的基础上,探讨柴达木盆地降水的水汽来源.结果表明: ①格尔木和德令哈地区6~9月大气降水线分别为,格尔木: deltaD = 7.840 delta~(18)O - 4.566(R~2 = 0.918,P < 0.001),德令哈: deltaD = 7.833 delta~(18)O + 8.606(R~2 = 0.986,P < 0.001).两地区6~9月大气降水线的斜率和截距均低于全球大气降水线,而格尔木地区的截距仅为- 4.566,反映出格尔木极其干旱的气候特点. ②格尔木降水的delta~(18)O在7月初较高,表现出一定的重同位素富集;在7月中下旬至9月初,delta~(18)O较低; 9月中下旬更低.德令哈降水的delta~(18)O在6~8月相对较高,9月中下旬较低. ③格尔木和德令哈地区水汽来源有一定的差异,格尔木地区可能是西南季风能够到达青藏高原的北部边界,德令哈地区水汽来源主要为局地蒸发.
英文摘要	Stable hydrogen and oxygen isotopes can be used as a tracer to analyze water vapor sources of atmospheric precipitation. We choose Golmud and Delingha as our study areas,Golmud locates in the south of Qaidam basin,and Delingha locates in the northeast. Based on the analysis of monthly change of hydrogen and oxygen isotopic compositions of precipitation during June to September of 2010,and the relationship between deltaD and delta~(18)O in precipitation,we investigated the water vapor sources of precipitation in eastern Qaidam basin. The results show that: ① meteoric water line between June to September in Golmud is: deltaD = 7.840 delta~(18)O - 4.566 (R~2 = 0.918,P < 0.001),and in Delingha is: deltaD = 7.833 delta~(18)O + 8.606 (R~2 = 0.986,P < 0.001). The slopes and intercepts of meteoric water line between June to September in both Golmud and Delingha are lower than the global average,and the intercept in Golmud is only - 4.566,which indicates the extremely arid climate condition. ② the delta~(18)O content of precipitation is much higher in Golmud in early July,it shows the enrichment of some heavier isotopes. However,the delta~(18)O content of precipitation becomes lower from late July to early September,especially for the late September. The delta~(18)O content of precipitation in Delingha is higher in June to August than that in late September. ③ the water vapor sources of precipitation in Golmud and Delingha are different,Golmud area is the northern border of Qinghai-Tibet Plateau where the southwest monsoon can reach,and the southwest monsoon brings water vapors of precipitation,but the water vapors of precipitation in Delingha are mainly from local evaporation.
中文关键词	柴达木盆地 ; 氢氧同位素 ; 水汽来源 ; 大气降水线 ; 过量氘
英文关键词	Qaidam Basin hydrogen and oxygen isotopes water vapor sources meteoric water line deuterium excess
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5488115
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232913
作者单位	1.河北师范大学资源与环境科学学院, 河北省环境演变与生态建设实验室, 石家庄, 河北 050024, 中国; 2.山西省环境规划院, 太原, 山西 030024, 中国
推荐引用方式 GB/T 7714	朱建佳,陈辉,巩国丽. 柴达木盆地东部降水氢氧同位素特征与水汽来源[J],2015,36(8):2784-2790.
APA	朱建佳,陈辉,&巩国丽.(2015).柴达木盆地东部降水氢氧同位素特征与水汽来源.环境科学,36(8),2784-2790.
MLA	朱建佳,et al."柴达木盆地东部降水氢氧同位素特征与水汽来源".环境科学 36.8(2015):2784-2790.