NUMERICAL EXPERIMENT ON THE EFFECT OF URBANIZATION UPON SUMMER LAND-SEA BREEZES IN THE COASTLAND OF GUANGXI

WEN Wei-jun; SHEN Tong-li; DING Zhi-ying; SONG Jie-hui

Abstract:

The 2003–C2006 observations were utilized to analyze the surface characteristics of summer land-sea breezes along the coastland of Guangxi and the Weather Research and Forecast model was applied to simulate the breeze structure on August 1–C2, 2006. Results show that 1) the intensity and distributions of the breezes reproduced from improved urban underlying surface were close to observations. In the daytime the coastwise urban band was a convergent belt of sea breeze, corresponding to the centers of torrential rains; in the nighttime hours the surface of the Gulf of Tonkin (the Vietnamese name) or the Northern Bay (the Chinese name) acted as a convergent zone of land breezes, likely to produce convective cloud cluster; 2) the experiment on urbanization showed the heat island effect enhancing (weakening) the sea (land) breeze development. Furthermore, the heat island effect mitigated the atmospheric cooling via radiation over the cities in the night, weakening sinking motion correspondingly, thereby suppressing the dominant factor responsible for the steady development of temperature inversion. As a result, the inversion vigor was reduced greatly, but nevertheless no strong effect of the decreased subsidence was found upon the inversion height.

Get Citation+

WEN Wei-jun, SHEN Tong-li, DING Zhi-ying, et al. NUMERICAL EXPERIMENT ON THE EFFECT OF URBANIZATION UPON SUMMER LAND-SEA BREEZES IN THE COASTLAND OF GUANGXI [J]. Journal of Tropical Meteorology, 2010, 16(3): 263-270.

Export:

Article Metrics

NUMERICAL EXPERIMENT ON THE EFFECT OF URBANIZATION UPON SUMMER LAND-SEA BREEZES IN THE COASTLAND OF GUANGXI

Key Laboratory for Meteorological Disasters by Nanjing University of Information Science & Technology and Jiangsu Provincial Government

Abstract: The 2003–C2006 observations were utilized to analyze the surface characteristics of summer land-sea breezes along the coastland of Guangxi and the Weather Research and Forecast model was applied to simulate the breeze structure on August 1–C2, 2006. Results show that 1) the intensity and distributions of the breezes reproduced from improved urban underlying surface were close to observations. In the daytime the coastwise urban band was a convergent belt of sea breeze, corresponding to the centers of torrential rains; in the nighttime hours the surface of the Gulf of Tonkin (the Vietnamese name) or the Northern Bay (the Chinese name) acted as a convergent zone of land breezes, likely to produce convective cloud cluster; 2) the experiment on urbanization showed the heat island effect enhancing (weakening) the sea (land) breeze development. Furthermore, the heat island effect mitigated the atmospheric cooling via radiation over the cities in the night, weakening sinking motion correspondingly, thereby suppressing the dominant factor responsible for the steady development of temperature inversion. As a result, the inversion vigor was reduced greatly, but nevertheless no strong effect of the decreased subsidence was found upon the inversion height.

HTML

Reference (14)

[1]	ZHANG Lei-ming, MIAO Man-qian, HONG Zhong-xiang,et al. Numerical simulation of the sea-land breeze circulationin the nighttime due to city expansion [J]. Chin. J. Atmos. Sci.,1993, 18(3): 366-372.
[2]	MIAO Man-qian, TANG You-hua. Interactions between seaand land breeze and heat island circulation during the summerover the delta region of the Yangtze River and urbanizationeffect on climate [J]. Plateau Meteor., 1998, 17(3): 280-289.
[3]	TONG Hua, CHEN Zhong-liang, SANG Jian-guo. A studyof the urban boundary layer model and its application in theHong Kong area [J]. Chin. J. Atmos. Sci., 2004, 28(6):957-978.
[4]	EDMILSON D F, CHRISTOPHER M R,WILLIAM R C, et al. Interactions of an urban heat island andsea-breeze circulations during winter over the metropolitanarea of Sao Paulo, Brazil [J]. Bound.-Layer Meteor., 2007,122(1): 43-65.
[5]	CAI Rong-shuo, YAN Bang-liang, HUANG Rong-hui. Anumerical model and its simulation of the land and sea breezeover the Taiwan Strait [J]. Chin. J. Atmos. Sci., 2003, 27(1):86-96.
[6]	ZHANG Ming, ZHANG Li-feng, YAN Zhao-hui, et al. Acalculation method on the sea breeze circulation [J]. Chin. J.Atmos. Sci., 1999, 23(6): 693-702.
[7]	LIN W S, WANG A Y, WU C H, et al. A case modeling ofsea-land breeze in Macao and its neighborhood [J]. Adv.Atmos. Sci., 2001, 18(6): 1 231-1 240.
[8]	WU Dui, CHEN Wei-chao, YOU Ji-ping. A study onnear-surface flow field and land-sea breezes structure ofHaikou area [J]. J. Trop. Meteor., 1995, 11(4): 306-314.
[9]	ZHOU Bo-sheng, WANG Yong-xin, YU Jian-guo, et al.Observationa results and analyses of the sea-land breeze overYangjiang coastal region in Guangdong [J]. J. Trop. Meteor.,2002, 18(2): 188-192.
[10]	LI Hua-hong, SHEN Tong-li, WANG Man, et al.Applications of adjoint assimilation system in correctingmodel terrain [J]. J. Nanjing Inst. Meteor., 2005, 28(3):330-336.
[11]	DU Qin, SHEN Tong-Li. Study of modification to modelerror by using the adjoint-model assimilation system [J]. J.Trop. Meteor., 2007, 23(2): 182-188.
[12]	LIN Zhen-min, YAO Cai, ZHENG Hong-xiang, et al.Climatic characteristics of categorized precipitation in June ~August in Guangxi [J]. Meteor. Res. & Appl., 2007, 28(2):36-41.
[13]	KE Shi-zhao, HUANG Jian. A Numerical simulation ofland and sea breezes in South China [J]. J. Trop. Meteor.,1993, 9(2): 169-176.
[14]	SONG Run-tian, JIN Yong-li. Analysis of control factorsof temperature inversion of advection fog wind field andcharacteristics of temperature field [J]. J. Trop. Meteor., 2001,17(4): 443-451.

NUMERICAL EXPERIMENT ON THE EFFECT OF URBANIZATION UPON SUMMER LAND-SEA BREEZES IN THE COASTLAND OF GUANGXI

Abstract:

References

Get Citation+

Share Article

Article Metrics

Proportional views

Manuscript History

Online:

通讯作者: 陈斌, bchen63@163.com