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首页> 外文期刊>Acta Meteorologica Sinica >IMPACTS OF FEBRUARY ANTARCTIC OSCILLATIONS ON SUMMER PRECIPITATION IN EASTERN CHINA
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IMPACTS OF FEBRUARY ANTARCTIC OSCILLATIONS ON SUMMER PRECIPITATION IN EASTERN CHINA

机译：2月南极涛动对中国东部夏季降水的影响

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摘要

Impacts of February Antarctic oscillations (AAO) on the subsequent summer precipitation in the eastern part of China are analyzed in this paper in the context of the NCEP/NCAR reanalysis data and the monthly precipitation data at 160 weather stations. Results show that on interannual time-scale, the correlation coefficient between February AAO index and July―August rainfall in North China is 0.53, which exceeds the confidence level of 99. 9%. When February AAO is strong, then the subsequent summer precipitation in North China is more-than-average, and meanwhile the summer precipitation in the Changjiang River Valley is less-than-average; and vice versa. Changes of AAO affect the subsequent intensity and position of the Northwest Pacific subtropical high, thus resulting in the south-north direction shift of the summer monsoon rain belt in China.
机译：本文利用NCEP / NCAR再分析数据和160个气象站的月度降水数据，分析了2月南极涛动（AAO）对中国东部随后夏季降水的影响。结果表明，在年际尺度上，华北地区2月AAO指数与7月—8月降雨之间的相关系数为0.53，超过了99. 9％的置信度。当2月AAO较强时，随后华北地区的夏季降水量将超过平均水平，而长江流域的夏季降水量将低于平均水平。反之亦然。 AAO的变化影响着西北太平洋副热带高压的强度和位置，进而导致中国夏季风雨带的南北向移动。

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