| 祁连山北坡中段降水稳定同位素特征及水汽来源分析 |
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| 引用本文： | 张百娟,李宗省,王昱,李永格,吕越敏,袁瑞丰,桂娟.祁连山北坡中段降水稳定同位素特征及水汽来源分析[J].环境科学,2019,40(12):5272-5285. |
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| 作者姓名： | 张百娟 李宗省 王昱 李永格 吕越敏 袁瑞丰 桂娟 |
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| 作者单位： | 兰州理工大学能源与动力工程学院,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,甘肃省水文水资源工程技术中心,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,甘肃省水文水资源工程技术中心,兰州730000;兰州理工大学能源与动力工程学院,兰州,730000 |
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| 基金项目： | 国家"万人计划"青年拔尖人才项目;中国科学院青年创新促进会优秀会员项目（2013274）;国家重点研发计划项目（2017YFC0404304）;中国科学院山地灾害与地表过程重点实验室开放基金项目;黄土与第四纪地质国家重点实验室开放基金项目（SKLLQG1814） |
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| 摘 要： | 依据祁连山北坡中段8个站点的降水样品,结合同期气象数据,从降水同位素特征、影响因素以及水汽来源等方面进行分析,结果表明:①研究区降水稳定同位素季节变化明显,表现为夏半年富集,冬半年贫化的特征;在空间尺度上δ18O值随海拔的升高而减小,年降水δ18O的海拔效应为-0. 19‰/100 m;②各站点的局地大气降水线的斜率和截距表现为随海拔的增加而增加的趋势,表明2 000 m以上的高海拔山区受到更强烈的局地再循环水汽的影响;③研究区降水中稳定同位素温度效应显著,δ18O的温度效应为0. 64‰,且仅在夏季存在微弱的降水量效应;④研究区云下蒸发作用显著.在5、6、7和8月,研究区降水δ18O的平均雨滴蒸发率分别为23%、11%、12%和16%,云下蒸发富集率46%、27%、38%和32%;⑤在夏季连续降雨条件下,研究区降水的水汽来源主要为西风水汽,同时受到局地蒸发水汽的影响.本研究结果有助于进一步了解内陆河水文循环过程,为进一步开展干旱区同位素水文研究奠定基础.
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| 关 键 词： | 祁连山北坡 大气降水 稳定同位素 水汽来源 影响因素 |
| 收稿时间： | 2019/5/28 0:00:00 |
| 修稿时间： | 2019/7/8 0:00:00 |
Characteristics of Stable Isotopes and Analysis of Water Vapor Sources of Precipitation at the Northern Slope of the Qilian Mountains |
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| Institution: | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730000, China;Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730000, China,Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China,Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China and Key Laboratory of Ecohydrology of In-land River Basin/Gansu Hydrology and Water Resources Engineering Research Center, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | |
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| Keywords: | Northern slope of Qilian Mountains precipitation stable isotopes vapour sources of precipitation influence factors |
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