1997年中国夏季旱涝和北半球平流层平均环流分析

Analysis of Summer Drought/flood in China and 50 hPa Mean Circulation over the Northern Hemisphere in 1997

  • 摘要: 通过分析对应我国夏季三类降水型的北半球50 hPa平均环流场特征,表明1997年我国夏季降水异常的50 hPa环流特征,主要是从冬到夏大范围高度场偏高,极地涡旋冬季弱春季强,太平洋高压冬春异常加强。

     

    Abstract: Through analyzing the features of 50 hPa mean circulations over the Northern Hemisphere for three summer rainfall patterns in China, it is shown that the features of 50 hPa circulation for summer precipitation anomaly over China in 1997 are mainly expressed as the higher geopotential height of large area from winter to summer, and weaker polar vortex in winter and stronger in spring, and strengthening for the Pacific high anomaly in winter and spring.

     

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