干旱区生态环境知识资源中心(Arid): 石羊河下游青土湖大气降水氢氧同位素特征及水汽来源

Arid

	石羊河下游青土湖大气降水氢氧同位素特征及水汽来源
其他题名	Characteristics of D and delta~(18)O in precipitation in Qingtu lake area,at lower reaches of Shiyanghe river and its water vapor sources
	赵鹏 1; 徐先英 2; 屈建军3 ; 李亚 2; 姜生秀 2; 张裕年 2
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2019
卷号	33 期号:3 页码:80-85
中文摘要	青土湖属于季风边缘区内陆河尾闾封闭湖泊,以其生态脆弱性和气候敏感性是古气候、古环境等全球变化环境研究的理想区域.降水是干旱区生态系统水循环的重要输入因子,研究降水氢氧同位素特征及水汽来源对全球气候变化背景下青土湖水资源管理具有重要的理论和实践意义.基于氢氧稳定同位素技术,通过分析青土湖5月~ 10月6个月21个大气降水氢氧同位素组成及与环境因子的关系,结合HYSPLIT模型模拟大气降水气团传输途径和过程,判定该地区水汽来源.结果表明:5月- 10月大气降水氢氧稳定同位素关系的线性方程LMWL为deltaD = 6.67delta~(18)O - 1.01(n = 21,R~2 = 0.95);大气降水的delta~(18)O变化范围为- 16.97 ~ 3.23,平均值为- 5.36.deltaD的变化范围为- 118.36 ~ 15.63,平均值为- 36.82.过量氘( d - excess)介于- 23.64 ~ 21.93,均值为6.03,低于全球平均值(10).降水delta~(18)O与降雨量显著相关,但温度效应不显著.受西风水汽、局地人工季节性湖面蒸发和亚洲季风的影响,青土湖大气降水水汽来源的季节性明显,夏季主要来源于西风环流、东南季风及局地蒸发,秋季来源于西伯利亚和蒙古的极地大陆气团.连续多年生态补水形成的人工季节性湖面蒸发成为夏季降水水汽来源之一,对改善湖区生态环境具有重要的意义.
英文摘要	The Qingtu lake is a closed and terminal lake in the inland river of the monsoon border area,where are the ideal areas for studying of the paleoclimate and the paleoenvironment because of its ecological vulnerability and climate sensitivity. Precipitation is an important input factor for the ecosystem in the arid area. So it is of great theoretical and practical significance to study the characteristics of hydrogen and oxygen isotopes and the source of water vapor for the management of water resources in Qingtu Lake under the background of global climate change. The precipitation deltaD and delta~(18)O data in the period from May to October in 2017 were analyzed to examine the relationship between the characteristics of deltaD and delta~(18)O their environmental factors. Furthermore,the air mass transmission pathway was determined and regional water vapor sources were identified based on HYSPLIT model. The meteoric water line equation is; the average deltaD value is - 36.82,ranging from - 118.36 to ~ 15.63,and the average delta~(18)O value is - 5.36,ranging from - 16.97 to 3.23. The average excess deuterium(d - excess) value is 6.03,ranging from - 23.64 to - 21.93,which is less than the global average 10. Aprecipitation effectexists significantly whereas thetemperature effectis not obvious. There are obvious seasonal changes of deltaD and delta~(18)O in atmospheric precipitation in Qingtu lake. Influenced by westerly vapor,local evaporation and Asian monsoon,the water vapor source of the precipitation in the Qingtu lake is obviously seasonal. In summer,it mainly comes from westerly circulation,southeast monsoon and local evaporation, and in autumn it comes from the polar continental air mass of Siberia and Mongolia. The artificial seasonal evaporation of lake water formed by ecological replenishment has become one of the sources of summer precipitation and water vapor,which is of great significance for improving the ecological environment of the lake area.
中文关键词	青土湖 ; 大气降水 ; 水汽来源 ; 氢氧同位素
英文关键词	Qingtu lake meteoric water vapor sources hydrogen and oxygen stables isotopes
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6458001
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239189
作者单位	1.甘肃省治沙研究所;;中国科学院西北生态环境资源研究院;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站;;中国科学院大学, 甘肃省荒漠化与风沙灾害防治国家重点实验室;;中国科学院沙漠与沙漠化重点实验室;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站;;, 兰州;;兰州;;民勤;;, ;;;;;;北京 730070;;733000;;733000;;100049; 2.甘肃省治沙研究所;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 甘肃省荒漠化与风沙灾害防治国家重点实验室;;甘肃民勤荒漠草地生态系统国家野外科学观测研究站, 兰州;;民勤, ;; 730070;;733000; 3.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院沙漠与沙漠化重点实验室;;, 兰州;;, ;;北京 733000;;100049
推荐引用方式 GB/T 7714	赵鹏,徐先英,屈建军,等. 石羊河下游青土湖大气降水氢氧同位素特征及水汽来源[J]. 甘肃省治沙研究所,2019,33(3):80-85.
APA	赵鹏,徐先英,屈建军,李亚,姜生秀,&张裕年.(2019).石羊河下游青土湖大气降水氢氧同位素特征及水汽来源.干旱区资源与环境,33(3),80-85.
MLA	赵鹏,et al."石羊河下游青土湖大气降水氢氧同位素特征及水汽来源".干旱区资源与环境 33.3(2019):80-85.