Dong Xiao-Fang, Deng Huang-Yue, Zhang Luan, Zhu Zhi-Peng, Wang Lin, Zheng Xiang-Min, Zhou Li-Min
Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographical Sciences, East China Normal University, Shanghai 200241, China.
Huan Jing Ke Xue. 2017 May 8;38(5):1817-1827. doi: 10.13227/j.hjkx.201609152.
A total of 70 precipitation samples were collected from August 2014 to August 2015 in Shanghai and the oxygen and hydrogen isotope of precipitation were analyzed. The relationship between the δO and deuterium excess of precipitation and ENSO events was addressed. The results showed that δD and δO of precipitation in Shanghai were higher in winter and spring than in summer and fall. The slope of meteoric water line with these data was a little smaller than the global meteoric water line. The main reason could be the unbalanced secondary evaporation in the process of precipitation. The correlation between the δO in precipitation and temperature and precipitation varied in different time scales. On a seasonal scale, this work revealed that there was no significant temperature effect in winter, but significant precipitation effect was found in the annual scales, which was obviously affected by the atmospheric circulation. δO values and deuterium excess in precipitation recorded the La Niña and El Niño conversion process. During the La Niña event, the δO and values were more negative than those in the El Niño event.
2014年8月至2015年8月期间，在上海共采集了70个降水样本，并对降水的氧同位素和氢同位素进行了分析。探讨了降水的δO和氘盈余与ENSO事件之间的关系。结果表明，上海降水的δD和δO在冬季和春季高于夏季和秋季。这些数据得到的大气降水线斜率略小于全球大气降水线。主要原因可能是降水过程中二次蒸发不均衡。降水δO与温度和降水之间的相关性在不同时间尺度上有所不同。在季节尺度上，这项研究表明冬季没有明显的温度效应，但在年尺度上发现了明显的降水效应，这明显受到大气环流的影响。降水中的δO值和氘盈余记录了拉尼娜和厄尔尼诺的转换过程。在拉尼娜事件期间，δO和值比厄尔尼诺事件期间更负。
