Using the China Meteorological Administration National Climate Center 160 stations monthly precipitation 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 Niño Index (Niño3.4 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 EI Niño 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 Niño 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 Niño in winter often more favorable for the summer precipitation in Jiuquan region in the same year. (3) The 2015/2016 EI Niño event had an impact on the water vapor conditions and the upward movement of Jiuquan area in the summer of 2016, more water vapor conditions and stronger ascending motion eventually led to the significantly higher rainfall.
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