IMPACT OF THE HEATINC OVER SOUTH ASIA UPON THE SUBTROPICAL HIGH OVER WEST-PACIFIC

LI Shuang-lin; JI Li-ren

Abstract:

A case is reported, during which the Subtropical High over the Western Pacific(hereafter, SHWP in abbreviation)shifted northwestward and met-yu at Chaniiang River valley ended. Several numerical experiments on SHWP activity influenced by the heating over south Asia monsoon area are carried out, and the statistic significance of the results is checked. The results indicate that the enhancement of positive heating over South Asia will motivate a wave-like series of anomaly centers, which propagate northeastward from the maximum heating center.so that a strong positive potential height anomaly center will set up from North China to Japan at Day 3 result in the enhancement of SHWP. Comparison of the influence upon SHWP by the heating over south Asia monsoonarea with that over ITCZ area south to SHWP is also carried out. It is pointed out that the heating over South Asiamonsoon area tends to favor SHWP northward movement while the heating over ITCZ area tends to thvor SHWP westward stretching. As for the time to begin to influence on SHWP, the heating over south Asia monsoon areafavors the enhancement of SHWP atter Day 3 while that over ITCZ south to SHWP effects after Day 5.

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LI Shuang-lin, JI Li-ren. IMPACT OF THE HEATINC OVER SOUTH ASIA UPON THE SUBTROPICAL HIGH OVER WEST-PACIFIC [J]. Journal of Tropical Meteorology, 1999, 5(2): 141-152.

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IMPACT OF THE HEATINC OVER SOUTH ASIA UPON THE SUBTROPICAL HIGH OVER WEST-PACIFIC

LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 China Wuhan Central Weather Service, Wuhan 430074 China

LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 China

Received Date: 1998-06-29

Rev Recd Date: 1998-10-26

Abstract: A case is reported, during which the Subtropical High over the Western Pacific(hereafter, SHWP in abbreviation)shifted northwestward and met-yu at Chaniiang River valley ended. Several numerical experiments on SHWP activity influenced by the heating over south Asia monsoon area are carried out, and the statistic significance of the results is checked. The results indicate that the enhancement of positive heating over South Asia will motivate a wave-like series of anomaly centers, which propagate northeastward from the maximum heating center.so that a strong positive potential height anomaly center will set up from North China to Japan at Day 3 result in the enhancement of SHWP. Comparison of the influence upon SHWP by the heating over south Asia monsoonarea with that over ITCZ area south to SHWP is also carried out. It is pointed out that the heating over South Asiamonsoon area tends to favor SHWP northward movement while the heating over ITCZ area tends to thvor SHWP westward stretching. As for the time to begin to influence on SHWP, the heating over south Asia monsoon areafavors the enhancement of SHWP atter Day 3 while that over ITCZ south to SHWP effects after Day 5.

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Reference (16)

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IMPACT OF THE HEATINC OVER SOUTH ASIA UPON THE SUBTROPICAL HIGH OVER WEST-PACIFIC

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