NUMERICAL SIMULATION STUDY OF THE EFFECTS OF TERRAIN AROUND TAIWAN ON TYPHOON DOT(1990)

Yang Jinghua; Dong Keqin

Abstract:

With the use of analyzed TCM-90 data,Typhoon Dot(1990)and complex evolutions are successfullyreproduced in numerical sboulation as it travels over the island of Taiwan. The simulation includes theformation of secondary highs in both circulation and geopotential fields, trajectory jumps during mergence with main centers, anomalous northward movement of a low center west of Taiwan, evolutionalprocess of a low-level jet over the Taiwan Straits and significant deviations of circulation center fromgeopotentia1 center between upper and lower levels. By examining ev0lutions of 3-h interval simulatedresults, detailed processes of changes in structure and track before and after Dot's passage of Taiwanis given, whose evolutional images are otherwise impossible with conventionai observations at intervalsof 6 h. A number of control experboents are conducted in the end of the work for understanding causesand mechanisms behind various properties.

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Yang Jinghua, Dong Keqin. NUMERICAL SIMULATION STUDY OF THE EFFECTS OF TERRAIN AROUND TAIWAN ON TYPHOON DOT(1990) [J]. Journal of Tropical Meteorology, 1997, 3(2): 128-138.

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NUMERICAL SIMULATION STUDY OF THE EFFECTS OF TERRAIN AROUND TAIWAN ON TYPHOON DOT(1990)

Guangzhou Inditute of Tropical and Oceanic Meteorology, Guangzhou, 510080

Chinese Academy of Meleorology ical Sciences, Beijing, 100081

Received Date: 1995-11-30

Rev Recd Date: 1997-04-08

Abstract: With the use of analyzed TCM-90 data,Typhoon Dot(1990)and complex evolutions are successfullyreproduced in numerical sboulation as it travels over the island of Taiwan. The simulation includes theformation of secondary highs in both circulation and geopotential fields, trajectory jumps during mergence with main centers, anomalous northward movement of a low center west of Taiwan, evolutionalprocess of a low-level jet over the Taiwan Straits and significant deviations of circulation center fromgeopotentia1 center between upper and lower levels. By examining ev0lutions of 3-h interval simulatedresults, detailed processes of changes in structure and track before and after Dot's passage of Taiwanis given, whose evolutional images are otherwise impossible with conventionai observations at intervalsof 6 h. A number of control experboents are conducted in the end of the work for understanding causesand mechanisms behind various properties.

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Reference (10)

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NUMERICAL SIMULATION STUDY OF THE EFFECTS OF TERRAIN AROUND TAIWAN ON TYPHOON DOT(1990)

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