冬季厄尔尼诺对酒泉2016年夏季降水的影响  

Influences of the Winter EI Nio Event on the Summer Precipitation in the Jiuquan Region of China in 2016

作　　者：段圣泽 张英华[2] 顾宇 DUAN Shengze;ZHANG Yinghua;GU Yu(Unit 95877 of People＇s Liberation Army of China, Jiuquan 735018, Gansu, China;Unit 94582 of People＇s Liberation Army of China, Queshan 463217, Henan, China;School of meteology andoceanography of PLA university of science and technology, Nanjing 211101, Jiangsu, China)

机构地区：[1]中国人民解放军95877部队,甘肃酒泉735018 [2]中国人民解放军94582部队,河南确山463217 [3]中国人民解放军理工大学气象海洋学院,江苏南京211101

出　　处：《高原气象》2018年第2期545-552,共8页Plateau Meteorology

基　　金：国家自然科学基金项目 (41161028)

摘　　要：利用中国气象局国家气候中心160个站点逐月降水资料和西太平洋副热带高压相关指数资料、中国气象局国家气象信息中心2 479个国家级地面站逐月降水资料、美国NCEP/NCAR资料、美国CPC Oceanic Ni1o Index及美国NOAA的ERSST V4海表温度资料,通过对本站降水量和大气环流形势的分析,对厄尔尼诺事件与酒泉地区2016年夏季降水之间的关系进行了相关研究。结果表明:(1)2016年是2015/2016年超强厄尔尼诺事件达到峰值之后的衰减年,受此事件的直接和间接影响,2016年夏季中国各地均出现了不同程度的旱涝灾害,总体来讲涝重于旱。地处中国西北内陆腹地的酒泉地区对此事件也表现出了较强的响应,2016年夏季降水较常年同期明显偏多。(2)酒泉夏季降水量与当年冬季Ni1o3.4指数呈正相关,冬季厄尔尼诺事件强度越强,更有利于当年夏季酒泉地区降水。(3)2015/2016年厄尔尼诺事件对2016年夏季酒泉地区上空的水汽条件及上升运动均有影响,更充足的水汽条件以及更强烈的上升运动最终导致了降水的明显偏多。Using the China Meteorological Administration National Climate Center 160 stations monthly precipi- tation data and the index of WPSH, the China Meteorological Administration National Meteorological Center 2 479 national ground stations monthly precipitation data , the NCEP/NCAR monthly average 500 hPa height field, 700 hPa humidity ratio, 700 hPa wind field, the CPC Oceanic Nifio Index （Nifio3.4 area monthly average sea surface temperature anomaly ）, the NOAA ERSST V4 average sea surface temperature data, through the analysis of the precipitation and atmospheric circulation situation of this site, the influences of the El Nifio event on the summer precipitation in Jiuquan region of China in 2016 were studied. The results show： （ 1 ）2016 is the attenuation year that after the super EI Nifio event reached its crest value. Influenced by its direct and indirect effects, in the summer of 2016, different levels of drought and waterlogging occurred in all parts of China. In general, waterlogging is more severe than drought. Located in the hinterland of northwest China, Jiuquan region had also a high response to it. Summer precipitation in Jiuquan region of China in 2016 was significantly more than the same period of other years. （2） The summer precipitation in Jiuquan region was positively correlated with the Nino3. 4 index in winter of that very year. The stronger EI Nifio in winter often more favorable for the summer precipitation in Jiuquan region in the same year. （3） The 2015/2016 E1 Nifio event had an impact on the water vapor conditions and the upward movement of Jiuquan area in the summer of 2016, more water vapor con- ditions and stronger ascending motion eventually led to the significantly higher rainfall.

关 键 词：厄尔尼诺 夏季降水 酒泉 正相关 

分 类 号：P448[天文地球—大气科学及气象学]