青藏高原东北侧初夏干湿年500hPa环流场特征分析

俞亚勋;谢金南;王宝灵

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高原气象 ›› 2000, Vol. 19 ›› Issue (1) : 43-51.
论文

青藏高原东北侧初夏干湿年500hPa环流场特征分析

  • 俞亚勋;谢金南;王宝灵
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AN ANALYSIS OF THE 500 HPA CIRCULATION PATTERNS FOR DROUGHT AND RAINY YEARS OF EARLY SUMMER IN THE NORTHEASTERN PART OF QINGHAI-XIZANG PLATEAU

  • YU Ya-xun;XIE Jin-nan;WANG Bao-ling
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摘要

使用NCEP/NCAR 1958~1997年40年再分析全球月平均网格点资料以及青藏高原东北侧地区同期17个站降水量观测资料,选取了初夏最干旱的3个年份(1962,1995,1997年)和最湿润的3个年份(1967,1984,1985年),分析计算了初夏典型干湿年东亚范围内500 hPa平均位势高度场、风矢场、涡度场和散度场,指出青藏高原东北侧初夏干旱和多雨与中高纬环流特征有关,表现在物理量场上有显著差异。

Abstract

The NCEP/NCAR global monthly reanalysis data and the observed precipitation data at 17 stations in the northeastern part of Qinghai-Xizang Plateau about 40 years(1958~1997) are used in this paper.Based on the selected three severe drought years(1962,1995,1997) and three rainy years(1967,1984,1985) in early summer,the 500 hPa potential height fields,u,v vector fields,vorticity fields and the divergence fields over East Asia in early summer are analyzed respectively.The results show that the drought and rainy years in the northeastern part of Qinghai-Xizang Plateau in early summer are related to the circulation patterns at the middle and high latitudes,the differences of physical factors are obviously distinct.

关键词

青藏高原东北侧 / 初夏 / 典型干湿年 / 环流特征

Key words

Northeastern part of / Early summer / Drought and rainy ye / Circulation patterns

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俞亚勋;谢金南;王宝灵. 青藏高原东北侧初夏干湿年500hPa环流场特征分析. 高原气象. 2000, 19(1): 43-51
俞亚勋;谢金南;王宝灵. AN ANALYSIS OF THE 500 HPA CIRCULATION PATTERNS FOR DROUGHT AND RAINY YEARS OF EARLY SUMMER IN THE NORTHEASTERN PART OF QINGHAI-XIZANG PLATEAU. Plateau Meteorology. 2000, 19(1): 43-51

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基金

九·五"国家重中之重项目"我国短期气候预测系统的研究"96-908-05-03和甘肃省气象局98-04科研项目资助
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