东亚副热带急流经向位置对中国西北东部盛夏降水的影响

Abstract

Abstract:

Many studies have shown that the East Asian subtropical westerly jet is closely related to the summer precipitation in most parts of China, but there are relatively few related studies in Northwest China. In this papers, the daily precipitation data from 179 meteorological stations in China, compiled by the National Meteorological Information Center, and the monthly analysis of NCEP/NCAR data were used to analyze the change of precipitation in midsummer (from July to August) in the eastern part of Northwest China from 1979 to 2017. On the basis of the East Asian subtropical westerly jet meridional position index, the relationship between the change of eastward subtropical westerly jet meridional position and the midsummer precipitation in the eastern part of Northwest China was discussed. The purpose of the study was to further improve the level of predicting drought and flood disasters in Northwest China. The results showed that the midsummer precipitation in the northeastern part of Northwest China was higher in the abnormal years when the center of East Asian subtropical westerly jet was northward, and vice versa. These showed that the change of subtropical westerly jet meridional position affected the change of midsummer precipitation in the eastern part of Northwest China.

Key words: midsummer precipitation')">

midsummer precipitation, climate change, East Asian subtropical jet meridional position, in eastern part of Northwest China

JI Kai, WANG Shi-xin, ZUO Hong-chao, WANG Yi-pu, DING Rui-qiang. Effect of Meridional Position of East Asian Subtropical Jet on Midsummer Precipitation in Eastern Part of Northwest China[J].Arid Zone Research, 2020, 37(1): 10-17.

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/ / Recommend midsummer precipitation; climate change; East Asian subtropical jet meridional position; in eastern part of Northwest China
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References 20

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Effect of Meridional Position of East Asian Subtropical Jet on Midsummer Precipitation in Eastern Part of Northwest China

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