Diurnal variation of typhoon precipitation in Northwest Pacific

RUAN Zhen-xin

Journal of Marine Sciences ›› 2015, Vol. 33 ›› Issue (4) : 37-42.

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Journal of Marine Sciences ›› 2015, Vol. 33 ›› Issue (4) : 37-42. DOI: 10.3969/j.issn.1001-909X.2015.04.004

Diurnal variation of typhoon precipitation in Northwest Pacific

  • RUAN Zhen-xin1,2
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Abstract

Using 15 year's TRMM-measured precipitation data, the diurnal variations of non-typhoon and typhoon precipitation in Northwest Pacific were studied. The diurnal signal of non-typhoon precipitation reaches its maximum at 06∶00, with a smaller maximum occurring around 15∶00. The typhoon precipitation within 500 km radius from the typhoon center shows a clear diurnal signal, and reaches its maximum around 03∶00~09∶00, and both of its mean and diurnal variation are larger than those of non-typhoon precipitation. Meanwhile, both the numbers of typhoon intensification and rapid intensification during 03∶00~08∶00 are bigger than other periods. From the satellite images of typhoon ‘HaiShen’, the area of extreme convection cloud is much larger in 06∶00 than in 18∶00, which is consistent with the diurnal variation pattern of precipitation.

Key words

typhoon / precipitation / diurnal variation

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RUAN Zhen-xin. Diurnal variation of typhoon precipitation in Northwest Pacific[J]. Journal of Marine Sciences. 2015, 33(4): 37-42 https://doi.org/10.3969/j.issn.1001-909X.2015.04.004

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