Isotopic spatial variations and isotopic effects of two heavy summer precipitation events across Beijing

Isotopic spatial variations and isotopic effects of two heavy summer precipitation events across Beijing
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北京两次夏季强降水事件的同位素空间变化及同位素效应

DOI:
10.1007/s10967-017-5182-5
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发表时间:
2017-02
影响因子:
1.6
通讯作者:
Yang Zhongshan
Yang Zhongshan
中科院分区:
化学4区
文献类型:
--
作者:
Li Jie;Pang Zhonghe;Wang Jingyu;Kong Yanlong;Bai Guoying;Zhao Hongyi;Yang Zhongshan

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对2014年7月29日和9月1日北京降水同位素监测网11个测站的两次强降水样品进行了稳定同位素分析,探讨了同位素效应。降水δ18O与温度和海拔高度的相关性不显著,7月29日降水经Rayleigh蒸馏模型校正后,δ 18O与纬度的相关性显著。这说明这两个气旋都是由南方水汽源形成的,水汽收支和HYSPLIT模式也证实了这一点。
Stable isotopes of precipitation samples collected during two heavy rainfall events on July 29 and September 1, 2014 at 11 stations from Beijing Network of Isotopes in Precipitation, are analyzed to discuss eventful isotopic effects. No significant correlations between precipitationδ18O and temperature/elevation are found. After correction with the Rayleigh distillation model for the rainfall on July 29, a significant correlation between isotopes and latitude was obtained for both rainfall events. This implies both rainfalls are formed by southern moisture sources, which were also confirmed by water vapor budget and HYSPLIT model.
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