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Proceedings Paper

Features of the short-term position variation of the west Pacific subtropical high during the torrential rain in Yangtze-Huaihe river valley and its possible cause
Author(s): Zhaoyong Guan; Bo Yu; Lijuan Wang; Jielin He; Gang Zeng
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Paper Abstract

By using the NCEP/NCAR daily reanalysis data, CMAP precipitation data , daily precipitation data of 740 stations in China and some remote sensing data, features of the short-term position variation of the west Pacific subtropical high(WPSH) during the torrential rain in Yangtze-Huaihe river valley and its possible cause are analyzed. Results show that the short-term position variation of WPSH is closely associated with the diabatic heating. During the torrential rain period, the apparent heating source and apparent moisture sink are exceptionally strong over Yangtze-Huaihe river valley( on the northwest side of WPSH )and the Bay of Bengal (to the west of WPSH). Based on the complete form of vertical vorticity tendency equation, it is found that the heating field over Yangtze-Huaihe river valley during the torrential rain period, which is in favor of the increase of cyclonic vorticity on the north side of WPSH, is unfavorable to the WPSH moving northward. And the heat source over the Bay of Bengal ,which is in favor of the increase of anti-cyclonic vorticity on the west of WPSH, may induce the westward extension of WPSH.

Paper Details

Date Published: 12 August 2009
PDF: 9 pages
Proc. SPIE 7456, Atmospheric and Environmental Remote Sensing Data Processing and Utilization V: Readiness for GEOSS III, 745611 (12 August 2009); doi: 10.1117/12.825464
Show Author Affiliations
Zhaoyong Guan, Nanjing Univ. of Information Science & Technology (China)
Bo Yu, Nanjing Univ. of Information Science & Technology (China)
Lijuan Wang, Nanjing Univ. of Information Science & Technology (China)
Jielin He, Nanjing Univ. of Information Science & Technology (China)
Gang Zeng, Nanjing Univ. of Information Science & Technology (China)


Published in SPIE Proceedings Vol. 7456:
Atmospheric and Environmental Remote Sensing Data Processing and Utilization V: Readiness for GEOSS III
Mitchell D. Goldberg; Hal J. Bloom, Editor(s)

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