西北太平洋台风降雨日变化

阮甄欣

doi:10.3969/j.issn.1001-909X.2015.04.004

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海洋学研究 ›› 2015, Vol. 33 ›› Issue (4) : 37-42. DOI: 10.3969/j.issn.1001-909X.2015.04.004

研究论文

西北太平洋台风降雨日变化

阮甄欣^1,2

作者信息 +

Diurnal variation of typhoon precipitation in Northwest Pacific

RUAN Zhen-xin^1,2

Author information +

文章历史 +

摘要

利用TRMM(Tropical Rainfall Measurement Mission)卫星15 a降雨数据,研究了西北太平洋非台风与台风降雨日变化。对于非台风降雨,其日变化信号最大值出现在上午06∶00,在下午15∶00时存在一较小的极大值。统计台风中心500 km内的平均降雨,发现其存在明显日变化信号,最大值出现在03∶00~09∶00之间,降雨量与日变化均大于非台风降雨;同时,台风增强及快速增强均在03∶00~08∶00之间发生次数较其他时间更多。从2002年台风“海神”的卫星云图上可以看出,云系内部强对流的面积在06∶00时明显大于18∶00时,这与降雨日变化的模态一致。

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.

导出引用

阮甄欣. 西北太平洋台风降雨日变化[J]. 海洋学研究. 2015, 33(4): 37-42 https://doi.org/10.3969/j.issn.1001-909X.2015.04.004

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

中图分类号： P732

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