DOI: 10.1002/joc.5852
Scopus记录号: 2-s2.0-85053483348
论文题名: Large-scale indices for assessing typhoon activity around Taiwan
作者: Tu J.-Y. ; Chen J.-M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 2 起始页码: 921
结束页码: 933
语种: 英语
英文关键词: index
; sea surface temperature
; typhoon
; western Pacific subtropical high
Scopus关键词: Atmospheric temperature
; Hurricanes
; Storms
; Submarine geophysics
; Surface properties
; Surface waters
; Tropics
; index
; Philippine seas
; Sea surface temperature (SST)
; South China sea
; Tropical Western Pacific
; Typhoon activity
; Western North Pacific
; Western Pacific
; Oceanography
; atmospheric wave
; autumn
; index method
; peripheral region
; sea surface temperature
; summer
; typhoon
; Bay of Bengal
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (Tropical)
; Pacific Ocean (West)
; Philippine Sea
; South China Sea
; Taiwan
英文摘要: This study quantifies large-scale indices associated with variations in the western Pacific subtropical high (WPSH) and tropical sea surface temperature (SST) to assess typhoon activity around Taiwan. A WPSH index is constructed for both summer and early autumn as the meridional difference of areal means between the northern (120°–130°E, 25°–30°N) and southern (120°–130°E, 20°–25°N) regions (north minus south) of the 500 hPa height. These are regions north and south of Taiwan. In the high index years, typhoons forming in the tropical western North Pacific tend to be steered by easterly/southeasterly flows at the southwestern boundary of a northwards-shifted WPSH to move northwestwards towards Taiwan, leading to increased typhoon activity around Taiwan. In the low index years, a southwards-shifted, eastwards-retreated WPSH steers typhoons along its western periphery to move northwards away from Taiwan. The northwards shift of the WPSH and consequent enhanced typhoon activity around Taiwan associate with a meridional wave train induced by a zonal SST gradient in summer, but link with a Matsuno-Gill-type response induced by tropical SSTs in early autumn. As so, the summer SST index is defined as a zonal gradient of areal-mean SSTs between the tropical western Pacific (150°–175°E, 10°–20°N) and the Bay of Bengal–South China Sea–Philippine Sea region (80°–130°E, 5°–20°N) (former minus latter). In early autumn, the SST index is averaged from the tropical western Pacific over 130°–165°E, 5°S–5°N. All WPSH and SST indices in summer and early autumn are significantly correlated (at the 99% level) with the number of typhoons affecting Taiwan. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116574
Appears in Collections: 全球变化的国际研究计划
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作者单位: Department of Geography, National Changhua University of Education, Changhua, Taiwan; Department of Maritime Information and Technology, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan
Recommended Citation:
Tu J.-Y.,Chen J.-M.. Large-scale indices for assessing typhoon activity around Taiwan[J]. International Journal of Climatology,2019-01-01,39(2)