OBSERVATIONAL ANALYSIS OF ASYMMETRIC DISTRIBUTION OF CONVECTION ASSOCIATED WITH TROPICAL CYCLONES “CHANCHU”AND “PRAPIROON” MAKING LANDFALL ALONG THE SOUTH CHINA COAST

YUAN Jin-nan; ZHOU Wen; HUANG Hui-jun; LIAO Fei

Abstract:

Observational data of mesoscale surface weather stations and weather radars of Guangdong province are employed to analyze the asymmetric distribution of convection prior to, during and after landfall for tropical cyclones of Chanchu and Prapiroon making landfall on the south China coast in 2006. The results showed that strong convection is located in the eastern and northern sectors of the landfalling Chanchu and Prapiroon, namely in the front and right portions of the TC tracks, for a period of time starting from 12 h prior to landfall to 6 h after it. Their convection also had distinct differences in the vertical direction. The analysis indicated that although the landfall of Chanchu and Prapiroon has the same asymmetric distribution of convection, the causes are not exactly the same. The asymmetric distribution of convection in the case of Chanchu is mainly correlated with the impacts of a strong environmental vertical wind shear, low-level horizontal wind shear, and low-level convergence and divergence. In the case of Prapiroon, however, the asymmetric distribution of convection is mainly associated with the impacts of low-level convergence and divergence.

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YUAN Jin-nan, ZHOU Wen, HUANG Hui-jun, et al. OBSERVATIONAL ANALYSIS OF ASYMMETRIC DISTRIBUTION OF CONVECTION ASSOCIATED WITH TROPICAL CYCLONES “CHANCHU”AND “PRAPIROON” MAKING LANDFALL ALONG THE SOUTH CHINA COAST [J]. Journal of Tropical Meteorology, 2010, 16(2): 171-180.

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OBSERVATIONAL ANALYSIS OF ASYMMETRIC DISTRIBUTION OF CONVECTION ASSOCIATED WITH TROPICAL CYCLONES “CHANCHU”AND “PRAPIROON” MAKING LANDFALL ALONG THE SOUTH CHINA COAST

National Basic Research Program of China (973 program) (2009CB421500), National Natural Science Foundation of China (90715031 40875026 and 40730948), Project of City University of Hong Kong (7001994), and Natural Science Foundation of Guangdong Province of China (8351030101000002)

Abstract: Observational data of mesoscale surface weather stations and weather radars of Guangdong province are employed to analyze the asymmetric distribution of convection prior to, during and after landfall for tropical cyclones of Chanchu and Prapiroon making landfall on the south China coast in 2006. The results showed that strong convection is located in the eastern and northern sectors of the landfalling Chanchu and Prapiroon, namely in the front and right portions of the TC tracks, for a period of time starting from 12 h prior to landfall to 6 h after it. Their convection also had distinct differences in the vertical direction. The analysis indicated that although the landfall of Chanchu and Prapiroon has the same asymmetric distribution of convection, the causes are not exactly the same. The asymmetric distribution of convection in the case of Chanchu is mainly correlated with the impacts of a strong environmental vertical wind shear, low-level horizontal wind shear, and low-level convergence and divergence. In the case of Prapiroon, however, the asymmetric distribution of convection is mainly associated with the impacts of low-level convergence and divergence.

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[1]	TAO Shi-yan. Rainstorms in China [M]. Beijing: SciencePress, 1980: 225-225.
[2]	MILLER B L. A study of the filling of Hurricane Donna(1960) over land [J]. Mon. Wea. Rev., 1964, 92(9): 389-406.
[3]	CLINE I M. Tropical Cyclones [M]. New York: MacMillan,1926, 301pp.
[4]	KOTESWARAM P, GASPAR S. The surface structure oftropical cyclones in the Indian area [J]. Indian J. Meteor.Geophys., 1956, 7(4): 339-352.
[5]	TULEYA R E, KURIHARA Y. A numerical simulation ofthe landfall of tropical cyclones [J]. J. Atmos. Sci., 1978, 35(2):242-257.
[6]	JONES R W. A simulation of hurricane landfall with anumerical model featuring latent heating by the resolvablescales [J]. Mon. Wea. Rev., 1987, 115(10): 2279-2297.
[7]	DUNN G E, MILLER B I. Atlantic Hurricanes [M]. BatonRouge: Louisiana State University Press, 1960, 377pp.
[8]	PARRISH J R, BURPEE R W, MARKS J F D, et al. Rainpatterns observed by digitized radar during the landfall ofHurricane Frederic (1979) [J]. Mon. Wea. Rev., 1982, 110(12):1933-1944.
[9]	BLACKWELL K G. The evolution of Hurricane Danny(1997) at landfall: Doppler-observed eyewall replacement,vortex contraction/intensification, and low-level wind maxima[J]. Mon. Wea. Rev., 2000, 128(12): 4002-4016.
[10]	CHAN J C L, LIANG X D. Convective asymmetriesassociated with tropical cyclone landfall. Part ?: ?-planesimulations [J]. J. Atmos. Sci., 2003, 60(13): 1560-1567.
[11]	CHAN J C L, LIU K S, CHING E, et al. Asymmetricdistribution of convection associated with tropical cyclonesmaking landfall along the South China coast [J]. Mon. Wea.Rev., 2004, 132(10): 2410-2420.
[12]	LIU K S, CHAN J C L, CHENG W C, et al. Distributionof convection associated with tropical cyclones makinglandfall along the South China coast [J]. Meteor. Atmos. Phys.,2007, 97(1): 57-68.
[13]	POWELL M D. The transition of the Hurricane Fredericboundary-layer wind field from the open Gulf Mexico tolandfall [J]. Mon. Wea. Rev., 1982, 110(12): 1912-1932.
[14]	WONG M L M, CHAN J C L. Tropical cyclone motion inresponse to land surface friction [J]. J. Atmos. Sci., 2006,63(44): 1324-1337.
[15]	LIN Ai-lan, WAN Qi-lin, LIANG Jian-yin. Thedistribution of precipitation from tropical cyclones makinglandfall in South China [J]. J. Trop. Meteor. (in Chinese),2003, 19(suppl.): 65-74.
[16]	JI Chun-xiao, XUE Gen-yuan, ZHAO Fang, et al. Thenumerical simulation of orographic effect on the rain andstructure of typhoon Rananim during landfall [J]. Chin. J. Atm.Sci., 2007, 31(2): 431-442.
[17]	CAI Ze-yi, YU Ru-cong. A numerical simulation of anextraordinary storm rainfall caused by a landing typhoon withLASG mesoscale model [J]. Chin. J. Atm. Sci., 1997, 21(4):459-471.
[18]	NIU Xue-xin, DU Hui-liang, LIU Jian-yong. Thenumerical simulation of rainfall and precipitation mechanismassociated with typhoon Sinlaku (0216) [J]. Acta Meteor.Sinica, 2005, 63(1): 57-68.
[19]	YUAN Jin-nan, WAN Qi-lin. Numerical study on theeffect of island topography and convective condensationheating on landfall typhoon “Vongfong” [J]. J. Trop. Meteor.(in Chinese), 2003, 19(suppl.): 81-87.
[20]	HANLEY D E, MOLINARI J, KEYSER D. A compositestudy of the interactions between tropical cyclones andupper-tropospheric troughs [J]. Mon. Wea. Rev., 2001, 129(10):2570-2584.
[21]	BLACK M L, GAMACHE J F, MARKS F D, et al.Eastern Pacific Hurricane Jimena of 1991 and Olivia of 1994:The effect of vertical shear on structure and intensity [J]. Mon.Wea. Rev., 2002, 130(9): 2291-2312.
[22]	CORBOSIERO K L, MOLINARI J. The effects of verticalwind shear on the distribution of convection in tropicalcyclones [J]. Mon. Wea. Rev., 2002, 130(8): 2110-2123.
[23]	ROGERS R F, CHEN S S, TENERELLI J E, et al. Anumerical study of the impact of vertical shear on thedistribution of rainfall in Hurricane Bonnie (1998) [J]. Mon.Wea. Rev., 2003, 131(8): 1577-1599.
[24]	WONG M L M, CHAN J C L. Tropical cyclone intensityin vertical wind shear [J]. J. Atmos. Sci., 2004, 61(15):1859-1876.

OBSERVATIONAL ANALYSIS OF ASYMMETRIC DISTRIBUTION OF CONVECTION ASSOCIATED WITH TROPICAL CYCLONES “CHANCHU”AND “PRAPIROON” MAKING LANDFALL ALONG THE SOUTH CHINA COAST

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