| 长江源区降水氢氧稳定同位素特征及水汽来源 |
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| 引用本文： | 汪少勇,王巧丽,吴锦奎,何晓波,丁永建,王利辉,胡召富.长江源区降水氢氧稳定同位素特征及水汽来源[J].环境科学,2019,40(6):2615-2623. |
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| 作者姓名： | 汪少勇 王巧丽 吴锦奎 何晓波 丁永建 王利辉 胡召富 |
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| 作者单位： | 中国科学院西北生态环境资源研究院,冰冻圈科学国家重点实验室,兰州730000;中国科学院西北生态环境资源研究院,内陆河流域生态水文重点实验室,兰州 730000;中国科学院大学,北京 100049;长江水利委员会水文局,武汉,430010;中国科学院西北生态环境资源研究院,冰冻圈科学国家重点实验室,兰州730000;中国科学院西北生态环境资源研究院,内陆河流域生态水文重点实验室,兰州 730000;中国科学院西北生态环境资源研究院,内陆河流域生态水文重点实验室,兰州 730000;中国科学院大学,北京 100049;中国科学院西北生态环境资源研究院,冰冻圈科学国家重点实验室,兰州730000;中国科学院大学,北京 100049 |
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| 基金项目： | 国家重点研发计划项目（2017YFC0405704，2017YFC0405706）；国家自然科学基金重点项目（41730751）；中央级公益性科研院所基本科研业务费专项（CKSF2017045）；冰冻圈科学国家重点实验室自主课题项目（SKLCS-ZZ-2018） |
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| 摘 要： | 基于长江源区冬克玛底流域2014年5～10月连续采集的73个降水同位素数据,结合相关气象资料,分析了降水中δD、δ~(18)O及氘盈余(d-excess)变化特征,讨论了δ~(18)O与气温、降水量的关系,利用HYSPLIT模型追踪流域降水的水汽来源并估算不同水汽来源对降水量的贡献比例.结果表明:研究区降水中δ~(18)O和δD变化范围分别为-26.5‰～1.9‰和-195.2‰～34.0‰,且δ~(18)O和δD值随时间变化波动较大,与不同来源水汽输送有直接的关系;区域降水线的斜率和截距均大于全球大气降水线,与青藏高原北侧地区的降水线相近;不同降水类型中的δ~(18)O和δD的关系差异显著,主要与水汽来源和形成降水时的气象条件有关;由于受局地蒸发水汽及水汽输送过程影响,流域大气降水d-excess值整体上相对偏大;研究区的降水同位素存在显著的降水量效应,但不存在温度效应,表明降水量对大气降水中稳定同位素含量的控制作用更强;水汽来源轨迹表明,研究区大气降水水汽来源主要有西南季风携带的海洋性水汽、局地蒸发水汽及西风输送水汽,对降水量的贡献比例分别为43%、36%和21%.该研究结果有助于进一步了解长江源头区冬克玛底流域的大气环流特征及水循环过程.
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| 关 键 词： | 青藏高原 长江源区 大气降水 稳定同位素 水汽来源 |
| 收稿时间： | 2018/11/19 0:00:00 |
| 修稿时间： | 2019/1/6 0:00:00 |
Characteristics of Stable Isotopes in Precipitation and Moisture Sources in the Headwaters of the Yangtze River |
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| WANG Shao-yong,WANG Qiao-li,WU Jin-kui,HE Xiao-bo,DING Yong-jian,WANG Li-hui and HU Zhao-fu.Characteristics of Stable Isotopes in Precipitation and Moisture Sources in the Headwaters of the Yangtze River[J].Chinese Journal of Environmental Science,2019,40(6):2615-2623. |
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| Authors: | WANG Shao-yong WANG Qiao-li WU Jin-kui HE Xiao-bo DING Yong-jian WANG Li-hui and HU Zhao-fu |
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| Institution: | State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100049, China,Hydrological Bureau of Yangtze River Water Resources Commission, Wuhan 430010 China,State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100049, China,State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100049, China and State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | |
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| Keywords: | Qinghai-Tibet Plateau headwaters of the Yangtze River precipitation stable isotopes moisture sources |
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