| 2006～2008年重庆大气降水δD和δ18O特征初步分析 |
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| 引用本文： | 李廷勇,李红春,沈川洲,杨朝秀,李俊云,衣成城,袁道先,王建力,谢世友.2006～2008年重庆大气降水δD和δ18O特征初步分析[J].水科学进展,2010,21(6):757-764. |
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| 作者姓名： | 李廷勇 李红春 沈川洲 杨朝秀 李俊云 衣成城 袁道先 王建力 谢世友 |
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| 作者单位： | 1.西南大学地理科学学院, 重庆, 400715; |
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| 基金项目： | 国土资源部岩溶动力学重点实验室开放基金，国家自然科学基金，黄土与第四纪地质国家重点实验室开放基金，西南大学基本科研业务费专项资金重点资助项目，"十一五"国家科技支撑计划资助项目 |
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| 摘 要： | 大气降水稳定同位素组成受到温度、蒸发、水汽源地等多种因素的复杂影响,在不同时间和不同地区具有很大差异.通过分析2006~2008年间重庆雨水样品的δD和δ18O,初步建立了当地的大气降水线方程.当地的大气降水稳定同位素组成在不同季节变化明显:夏季降水中的稳定同位素值普遍偏轻,而冬季降水中稳定同位素值普遍偏重.水汽来源是控制当地大气降水稳定同位素组成的最重要原因,而蒸发作用等是控制短期次降水事件中雨水稳定同位素组成的重要影响因素.
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| 关 键 词： | 重庆 夏季风 大气降水 δD δ18O 水汽源地 |
| 收稿时间： | 2010-01-02 |
Study on the δD and δ18 O characteristics of meteoric precipitation during 2006-2008 in Chongqing, China |
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| LI Ting-yong,LI Hong-chun,SHEN Chuan-zhou,YANG Chao-xiu,LI Jun-yun,YI Cheng-cheng,YUAN Dao-xian,WANG Jian-li,XIE Shi-you.Study on the δD and δ18 O characteristics of meteoric precipitation during 2006-2008 in Chongqing, China[J].Advances in Water Science,2010,21(6):757-764. |
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| Authors: | LI Ting-yong LI Hong-chun SHEN Chuan-zhou YANG Chao-xiu LI Jun-yun YI Cheng-cheng YUAN Dao-xian WANG Jian-li XIE Shi-you |
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| Abstract: | The stable isotopic compositions of precipitation exhibit great diversities in different areas and seasons due to in fluences of multiple factors,such as temperature,evaporation,rainfall amount,moisture source and others.The Local Meteoric Water Line(LMWL) is established for Chongqing,China using precipitation samples collected between April 2006 and September 2008,as the result of a 29-month field campaign on the campus of Southwest University.Both D and 18O values in rainwater exhibit sign ificant seasonal variations,having higher values in winters and lower one in summers.The result also indicates that the moisture source is the primary factor for determining the isotopic compositions in local precipitation in this monsoonal region.In addtion,the evaporation is another important factor in controlling the isotopic compositions of rainwater during short-term rain events. |
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| Keywords: | Chongqing summer monsoon meteoric precipitation D 18O moisture source |
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