Sui Ming Zhen, Gao De Qiang, Xu Qing, He Dong Mei, Wang Lei, Wang Ting
Key Laboratory of Forest Ecology and Environment of the National Forestry and Grassland Administration, Reserch Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China.
Jiangsu Academy of Forestry, Nanjing 211153, China.
Ying Yong Sheng Tai Xue Bao. 2019 Jun;30(6):1823-1832. doi: 10.13287/j.1001-9332.201906.009.
It is necessary to examine the characteristics of hydrological cycle in Gaoyou area of Jiang-su Province in response to climate change and flood disasters. In this study, 121 atmospheric rain samples were collected and environmental factors were recorded from July 2015 to October 2017. We analyzed the hydrogen and oxygen stable isotopic composition of rain and identify moisture sources in this area. Results showed that the hydrogen and oxygen isotopic composition of rain had an seasonal variation, which was positive in the winter but negative in the summer. D-excess value was higher in winter than that in summer. On the annual scale, significantly negative relationships between δD (δO) and temperature and between δD (δO) and precipitation indicated the "anti-temperature effect" and "precipitation amount effect", respectively. On the seasonal scale, there was no obvious "temperature effect" but "precipitation amount effect" in autumn and winter. Results from the HYSPLIT model showed that the precipitation in this area came mainly from ocean evaporation that was influenced by the Chinese South Sea, Indian Ocean and Pacific Ocean. Precipi-tation in other seasons mainly came from the water vapor mixture from the Eurasian continent, Atlantic Ocean, Arctic Ocean, as well as local evaporation. The seasonal pattern of δD and δO values in precipitation was mainly influenced by monsoon activity and El Niño-Southern Oscillation (ENSO). In addition, the precipitation isotopes clearly indicated the shift in climates from El Niño to La Niña.
有必要研究江苏省高邮地区水文循环的特征，以应对气候变化和洪水灾害。在本研究中，于2015年7月至2017年10月收集了121个大气降雨样本并记录了环境因素。我们分析了降雨的氢氧稳定同位素组成，并确定了该地区的水汽来源。结果表明，降雨的氢氧同位素组成具有季节变化，冬季为正，夏季为负。冬季的氘过量值高于夏季。在年尺度上，δD（δO）与温度之间以及δD（δO）与降水量之间的显著负相关分别表明了“反温度效应”和“降水量效应”。在季节尺度上，秋冬季节没有明显的“温度效应”，但存在“降水量效应”。HYSPLIT模型的结果表明，该地区的降水主要来自受中国南海、印度洋和太平洋影响的海洋蒸发。其他季节的降水主要来自欧亚大陆、大西洋、北冰洋的水汽混合以及局部蒸发。降水中δD和δO值的季节模式主要受季风活动和厄尔尼诺-南方涛动（ENSO）的影响。此外，降水同位素清楚地表明了气候从厄尔尼诺向拉尼娜的转变。
