A CIRCULATION SIGNAL OF ABNORMAL SNOW COVER OVER THE TIBETAN PLATEAU AND ITS RELATION TO SUMMER RAINFALL IN CHINA

Cai Xuezhan; Wu Bin

Vol.16, NO.1, 2005

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Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(1): 89-95

Cai Xuezhan, Wu Bin. A circulation signal of abnormal snow cover over the Tibetan Plateau and its relation to summer rainfall in China. J Appl Meteor Sci, 2005, 16(1): 89-95.

Citation:

Cai Xuezhan, Wu Bin. A circulation signal of abnormal snow cover over the Tibetan Plateau and its relation to summer rainfall in China. J Appl Meteor Sci, 2005, 16(1): 89-95.

Cai Xuezhan, Wu Bin. A circulation signal of abnormal snow cover over the Tibetan Plateau and its relation to summer rainfall in China. J Appl Meteor Sci, 2005, 16(1): 89-95.

Citation:

Cai Xuezhan, Wu Bin. A circulation signal of abnormal snow cover over the Tibetan Plateau and its relation to summer rainfall in China. J Appl Meteor Sci, 2005, 16(1): 89-95.

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A CIRCULATION SIGNAL OF ABNORMAL SNOW COVER OVER THE TIBETAN PLATEAU AND ITS RELATION TO SUMMER RAINFALL IN CHINA

Cai Xuezhan,
Wu Bin

Fujian Meteorological Observatory, Fuzhou 350001

Received Date: 2003-01-13
Rev Recd Date: 2004-04-09
Publish Date: 2005-02-28

Abstract

Abstract

Based on the integrated analysis for 1955—1993 snow cover data on the Tibetan Plateau and the NCEP/NCAR reanalyzed Northern Hemisphere 500 hPa geopotential height data, comparison and correlation analysis were performed. It reveals that there is a atmospheric teleconnection pattern during snowcover anomaly over the Plateau in winter, so abnormal snowcover teleconnection pattern intensity index (I_asp) is given. Results further reveal the possible association with East Asia-Pacific summer teleconnection patter and its impact on the rainy season rainbelt distribution in China, especially on rainfall over the middle and lower reaches of Yangtze River Valley. The result provides a physical base for the application of Iasp in show-term climate prediction.
- Snow cover;
- Atmosphere teleconnection;
- Rainbelt

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References(22)

Figures and Tables

图 1 (a) 典型多雪年与典型少雪年冬季500 hPa高度差值场 (单位:dagpm)(b) 冬季高原积雪综合指数与同期500 hPa高度相关分布 (相关系数扩大100倍)

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图 2 I_asp强度指数与冬季高原积雪综合指数年际变化

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图 3 (a) 典型多雪年与少雪年夏季500 hPa高度差值场 (单位:dagpm)(b)I_asp与夏季500 hPa高度相关分布 (相关系数扩大100倍)

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图 4 I_asp与我国7月降水相关分布 (相关系数扩大100倍)

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