A DYNAMICAL INTERPRETATION OF THE WIND FIELD IN TROPICAL CYCLONES WITH THE CONSIDERATION OF OROGRAPHIC FACTORS

HAO Shi-feng; PAN Jin-song; YUE Cai-jun; CUI Xiao-peng; YANG Shi-fang

Abstract:

Based on the barotropic primitive equation in the polar coordinate system and the appropriate assumption, we obtained the mathematical equation of orographic forcing on unit mass air parcel. With the consideration of the frictional stress of the sea and land, supposing that parcel velocity in tropical cyclones is in linear variation and that the distribution of surface pressure is circular, a set of equations are derived, which describe the impact of orographic slope error, the central pressure error and position error of tropical cyclones on the wind field in the tropical cyclone. Typhoon Wipha (2007) is selected to verify the above interpretation method. The results show that the orographic slope, the frictional coefficient, the intensity and position of the cyclone are the important factors which have great influence on the interpretation of wind information about tropical cyclones. The dynamic interpretation method gives very good results, especially for the coastal area. It is applicable to improving the forecasts of the wind field in tropical cyclones.

Get Citation+

HAO Shi-feng, PAN Jin-song, YUE Cai-jun, et al. A DYNAMICAL INTERPRETATION OF THE WIND FIELD IN TROPICAL CYCLONES WITH THE CONSIDERATION OF OROGRAPHIC FACTORS [J]. Journal of Tropical Meteorology, 2010, 16(2): 125-133.

Export:

Article Metrics

A DYNAMICAL INTERPRETATION OF THE WIND FIELD IN TROPICAL CYCLONES WITH THE CONSIDERATION OF OROGRAPHIC FACTORS

Zhejiang Meteorology Observatory

Abstract: Based on the barotropic primitive equation in the polar coordinate system and the appropriate assumption, we obtained the mathematical equation of orographic forcing on unit mass air parcel. With the consideration of the frictional stress of the sea and land, supposing that parcel velocity in tropical cyclones is in linear variation and that the distribution of surface pressure is circular, a set of equations are derived, which describe the impact of orographic slope error, the central pressure error and position error of tropical cyclones on the wind field in the tropical cyclone. Typhoon Wipha (2007) is selected to verify the above interpretation method. The results show that the orographic slope, the frictional coefficient, the intensity and position of the cyclone are the important factors which have great influence on the interpretation of wind information about tropical cyclones. The dynamic interpretation method gives very good results, especially for the coastal area. It is applicable to improving the forecasts of the wind field in tropical cyclones.

HTML

Reference (16)

[1]	CHEN Lian-shou, LUO Zhe-xian, LI Ying. Researchadvances on tropical cyclone landfall process [J]. Acta Meteor.Sinica(in Chinese), 2004, 62(5): 541-549.
[2]	CUI Xiao-peng, GAO Shou-ting, WU Guo-xiong.Up-sliding slantwise vorticity development and the completevorticity equation with mass forcing [J]. Adv. Atmos. Sci.,2003, 20(5): 825-836.
[3]	CUI Xiao-peng. Quantitative diagnostic analysis of surfacerainfall processes by surface rainfall equation [J]. Chin. J.Atmos. Sci.(in Chinese), 2009, 33(2): 375-387.
[4]	ZHANG Hai-xia, CUI Xiao-peng, KANG Feng-qin, et al.Observational analysis for a torrential rain caused by a landfalltyphoon [J]. Plateau Meteor. (in Chinese), 2007, 26(5):980-991.
[5]	ZHAO Yu, CUI Xiao-peng, WANG Jian-guo. A study on aheavy rainfall event triggered by inverted typhoon trough inShandong province [J]. Acta Meteor. Sinica (in Chinese), 2008,66(3): 423-436.
[6]	ZOU X L, XIAO Q N. Studies on the initialization andsimulation of a mature hurricane using a variational bogusdata assimilation scheme [J]. J. Atmos. Sci., 2000, 57(7):836-860.
[7]	PU Z, BRAUN S A. Evaluation of bogus vortex techniqueswith four dimensional variational data assimilation [J]. Mon.Wea. Rev., 2001, 129(8): 2023-2039.
[8]	LEI Xiao-tu, CHEN Lian-shou. An overview on theinteraction between tropical cyclone and mid-latitude weathersystems [J]. J. Trop. Meteor. (in Chinese), 2001, 17(4):452-461.
[9]	ZHANG Jian-lin, SUI Shi-feng. CHGS method fornumerical forecasting of typhoon wave [J]. Trop. Oceanol. (inChinese), 1989, 8(1): 58-66.
[10]	HU Bang-hui, TAN Yan-ke, ZHANG Xue-min.Distribution of wind speed of tropical cyclone over the sea [J].Chin. J. Atmos. Sci. (in Chinese), 1999, 23(3): 316-322.
[11]	HUANG Xiao-gang, FEI Jian-fang, ZHANG Gen-sheng,et al. Construction of wind speed in typhoon on ocean surface[J]. J. Trop. Meteor. (in Chinese). 2004, 20(2): 130-136.
[12]	HAO Shi-feng, CUI Xiao-peng, PAN Jin-song, et al. Adynamical interpretation of the wind field tropical cyclones [J].J. Trop. Meteor., 2009, 15(2): 210-216.
[13]	LIU Shi-kuo, LIU Shi-da. Inner and outer Structures oftropical cyclone. I: Barotropic modle [J]. J. Trop. Meteor. (inChinese) 1994, 10(3): 193-203.
[14]	LIU Shi-kuo, LIU Shi-da. Inner and outer Structures OfTropical Cyclone II Baroclinic Model [J] . J. Trop. Meteor.(in Chinese) 1994, 10(4): 290-299.
[15]	ZHU Qian-gen, LIN Jin-rui, SHOU Shao-wen, et al.Principles and Methods of Synoptic Meteorology [M] (inChinese). Beijing: China Meteorological Press, 1992: 320-324.
[16]	LV Mei-zhong, Peng Yong-qing. Tutorial of DynamicalMeteorology [M]. Beijing: China Meteorological Press, 1990:92.

A DYNAMICAL INTERPRETATION OF THE WIND FIELD IN TROPICAL CYCLONES WITH THE CONSIDERATION OF OROGRAPHIC FACTORS

Abstract:

References

Get Citation+

Share Article

Article Metrics

Proportional views

Manuscript History

Online:

通讯作者: 陈斌, bchen63@163.com