Characteristics of typhoon frequency in the western North Pacific and it relation to the air-sea fluxes

ZHENG Haoyang; WU Liang; WEN Zhiping; WANG Tongmei

doi:10.3969/j.issn.0253-4193.2013.03.006

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ZHENG Haoyang, WU Liang, WEN Zhiping, WANG Tongmei. Characteristics of typhoon frequency in the western North Pacific and it relation to the air-sea fluxes[J]. Haiyang Xuebao, 2013, 35(3): 47-55. doi: 10.3969/j.issn.0253-4193.2013.03.006

Citation:

ZHENG Haoyang, WU Liang, WEN Zhiping, WANG Tongmei. Characteristics of typhoon frequency in the western North Pacific and it relation to the air-sea fluxes[J]. Haiyang Xuebao, 2013, 35(3): 47-55. doi: 10.3969/j.issn.0253-4193.2013.03.006

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Characteristics of typhoon frequency in the western North Pacific and it relation to the air-sea fluxes

doi: 10.3969/j.issn.0253-4193.2013.03.006

1.
Center for Monsoon and Environment Research/Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China;Zhuhai Meteorological Bureau, Zhuhai 519000, China
2.
Center for Monsoon and Environment Research/Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China;Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100190, China
3.
Center for Monsoon and Environment Research/Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China

Received Date: 2011-08-25
Rev Recd Date: 2013-01-15

Abstract

Abstract

Relying on the investigation and study, it is verified that the most abnormal places of western North Pacific typhoon frequency is the east part of 150°E in low latitude region. Whats more, having been testified, typhoon frequency is closely related to the 850 hPa atmospheric circulation, latent heat flux and short-wave radiation flux. It is found that when western Pacific subtropical high becomes weaker (stronger) and moves eastward (westward), the westerly in the low latitude region will be strengthened (weakened). Along with the monsoon troughs east movement to 160°E (west movement to 140°E), more (less) latent heat flux will be transmitted from the ocean to the air. A strong (weak) vapor source can be found in the southern of monsoon trough, which is brought by the prevailing (un-prevailing) westerly and then convergences the vapor of the south subtropical high that is embedded in the easterly vapor stream. Meanwhile, the converging upward warm wet vapor cloud clusters absorb plenty (lack) of short-wave radiation flux so (not) as to form a deep-thick high temperature and high humidity unstable structure. Finally, the accumulation of the typhoon energy, together with the strong (weak) lower convergence, and the increase (decrease) of the upper divergence, is beneficial (unbeneficial) to the typhoon generation in the east part of 150°E in the low latitude region.
- western North Pacific (WNP),
- typhoon frequency,
- air-sea fluxes,
- atmospheric circulation

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References(17)

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