Typhoon Processes Making Landfall in China from 2000 to 2007

Wang Yan; Zheng Dong; Zhang Yijun

Vol.22, NO.3, 2011

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2011 > 22(3): 321-328

Wang Yan, Zheng Dong, Zhang Yijun. Typhoon processes making landfall in China from 2000 to 2007. J Appl Meteor Sci, 2011, 22(3): 321-328.

Citation:

Wang Yan, Zheng Dong, Zhang Yijun. Typhoon processes making landfall in China from 2000 to 2007. J Appl Meteor Sci, 2011, 22(3): 321-328.

Wang Yan, Zheng Dong, Zhang Yijun. Typhoon processes making landfall in China from 2000 to 2007. J Appl Meteor Sci, 2011, 22(3): 321-328.

Citation:

Wang Yan, Zheng Dong, Zhang Yijun. Typhoon processes making landfall in China from 2000 to 2007. J Appl Meteor Sci, 2011, 22(3): 321-328.

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Typhoon Processes Making Landfall in China from 2000 to 2007

Wang Yan^{1,2
,
,},
Zheng Dong¹,
Zhang Yijun¹

1.
Laboratory of Lightning Physics and Protection Engineering, Chinese Academy of Meteorological Sciences, Beijing 100081
2.
Wuhan Central Meteorological Observatory, Wuhan 430074

Received Date: 2009-11-03
Rev Recd Date: 2011-03-07
Publish Date: 2011-06-30

Abstract

Abstract

Based on the data of LIS, PR and TMI of TRMM satellite, the characteristics of lightning activities and precipitation in 41 typhoon processes making landfall in China from 2000 to 2007 are analyzed. The lightning activities in typhoons are found to be relatively weak compared with other convective weather systems. The lightning activity in outer rain band is the strongest and that in inner rain band is the weakest. Corresponding to these three regions, the average lightning frequencies are 16.05, 5.04 fl·min^-1 and 2.72 fl·min^-1 and the average lightning densities are 0.023, 0.029 fl·km^-2·min^-1 and 0.005 fl·km^-2·min^-1, respectively. The lightning activity in eyewall converged more than those in other two regions. Two peak values are found along the radial direction of typhoon. The main peak located in the outer rain band, 375 km away from the center of typhoon. The second peak is near to the common boundary of eyewall and inner rain band with the distance to the center of typhoon being 55 km. It is also found that the area of convective precipitation is far smaller than that of stratiform precipitation. However, the convective precipitation amount is basically equivalent to the stratiform precipitation. The average convective precipitation intensities in eyewall, inner rain band and outer rain band are 7.7, 26.3 mm·h^-1 and 42.6 mm·h^-1, respectively. The corresponding values of stratiform precipitation intensities are 5.2, 8.3 mm·h^-1 and 11.2 mm·h^-1, respectively. The average heights of precipitation echo of convective cloud and stratiform cloud are 8 km and 7 km respectively in eyewall and inner rainband and 11 km and 9 km respectively in outer rain band. The lower the polarization corrected temperature of 85.5 GHz (TPC85.5) is, the higher occurrence probability of lightning there are. The lowest T_PC85.5 is found in outer rain band. The differences of the reflectivity at 6 km level and T_PC85.5 are obvious between the regions with lightning activity and the regions without lightning activity. In eyewall, the average T_PC85.5 is smaller than 210 K. They are smaller than 220 K and 200 K in inner rain band and outer rain band, respectively. The reflectivity values at 6 km level in the regions with lightning activity are universally larger than 20 dBZ and those in the regions without lightning activity are universally smaller than 30 dBZ.
- typhoon;
- TRMM satellite;
- lightning;
- precipitation

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References(26)

Figures and Tables

图 1 闪电活动随台风径向分布 (a) 闪电频次, (b) 闪电密度

Fig. 1 Lightning distribution along the radial direction of typhoons

(a) lightning frequency, (b) lightning density

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Fig. 2 Precipitation intensity's accumulate frequency in eyewall, inner rainband and outer rainband of typhoon processes

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Fig. 3 The probability of the occurrence of lightning vs T_PC85.5 in three areas of typhoon proccesses

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Fig. 4 Distribution of average 6 km radar reflectivity and T_PC85.5 at lightning's locality in three areas of typhoon processes

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Table 1 Precipitation characteristics in three areas (eyewall, inner rainband, outer rainband) of typhoon processes observed by PR

区域	总点数	层云降水面积比例/%	对流云降水面积比例/%	平均层云降水强度/ (mm·h^-1)	平均对流云降水强度 /(mm·h^-1)	层云降水量比例/%	对流云降水量比例/%	层云降水平均回波高度/km	对流云降水平均回波高度/km
眼壁	11128	60.3	19.3	5.2	7.7	53.3	46.7	7.1	8.4
内雨带	8940	65.0	13.9	8.3	26.3	51.8	48.2	6.7	8.5
外雨带	296835	54.1	26.4	11.2	42.6	48.6	51.4	8.8	10.9

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