Evolution and Frontogenesis of an Imbalanced Flow —the Influence of Vapor Distribution and Orographic Forcing

Wang Yunfeng; Wu Rongsheng; Pan Yinong

doi:10.1007/s00376-000-0008-7

Impact Factor: 3.9

Volume 17 Issue 2

Apr. 2000

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 2000 > 17(2): 256-274

Evolution and Frontogenesis of an Imbalanced Flow —the Influence of Vapor Distribution and Orographic Forcing

1.
Laboratory of Mesoscale Severe Weather, Nanjing University, Nanjing 210093,Laboratory of Mesoscale Severe Weather, Nanjing University, Nanjing 210093,Laboratory of Mesoscale Severe Weather, Nanjing University, Nanjing 210093

doi: 10.1007/s00376-000-0008-7

Abstract
References
Related papers
PDF

Abstract:
If the initial fields are not in geostrophic balance, the adjustment and evolution will occur in the stratified fluid, and the frontogenesis will occur under suitable conditions. The evolution is studied here with a nonhydrostatic fully compressible meso-scale model (Advanced Regional Prediction System, ARPS). Four cases are designed and compared: (i) control experiment; (ii) with different initial temperature gradient; (iii) with vapor distribution; (iv) with orographic forcing. The results show that: (1) there is an inertial oscillation in the evolution of the imbalanced flow with the frequency of the local Coriolis f, and with its amplitude de-creasing with time. The stationary balanced state can only be approached as it cannot be reached in the limit duration of time, The energy conversion ratio varies in the range of [0, 1 / 3]; (2) the stronger initial tempera-ture gradient can make the final energy conversion ratio higher, and vice versa; (3) suitable vapor distribu-tion is favorable for the frontogenesis. It will bring forward the time of the frontogenesis, strengthen the in-tensity of the cold front, and influence the final energy conversion ratio; (4) the orographic forcing has an ev-idently strengthening effect on the frontogenesis. The strengthening effect on the frontogenesis and the influ-ence on the final energy conversion ratio depend on the relative location of the mountain to the cold front.
- Evolution,
- Frontogenesis,
- Inertial oscillation,
- Vapor distribution and orographic forcing
References

[1]	Fang Juan, Wu Rongsheng, 1998: Frontogenesis, Evolution and the Time Scale of Front Formation, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 233-246. doi: 10.1007/s00376-998-0042-4
[2]	Li Chongyin, Li Guilong, 1997: Evolution of Intraseasonal Oscillation over the Tropical Western Pacific / South China Sea and Its Effect to the Summer Precipitation in Southern China, ADVANCES IN ATMOSPHERIC SCIENCES, 14, 246-254. doi: 10.1007/s00376-997-0023-z
[3]	YANG Shuai, GAO Shouting, LU Chungu, 2014: A Generalized Frontogenesis Function and Its Application, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 1065-1078. doi: 10.1007/s00376-014-3228-y
[4]	ZHOU Lingli, DU Huiliang, ZHAI Guoqing, WANG Donghai, 2013: Numerical Simulation of the Sudden Rainstorm Associated with the Remnants of Typhoon Meranti (2010), ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1353-1372. doi: 10.1007/s00376-012-2127-3
[5]	Wu Rongsheng, Fang Juan, 2001: Mechanism of Balanced Flow and Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 323-334. doi: 10.1007/BF02919313
[6]	Majid M. Farahani, Wu Rongsheng, 1998: A Numerical Study of Geostrophic Adjustment and Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 179-192. doi: 10.1007/s00376-998-0038-0
[7]	PENG Jiayi, FANG Juan, WU Rongsheng, 2004: Interaction of Mesoscale Convection and Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 814-823. doi: 10.1007/BF02916377
[8]	Fang Juan, Wu Rongsheng, 2001: Topographic Effect on Geostrophic Adjustment and Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 524-538. doi: 10.1007/s00376-001-0042-0
[9]	Yang Hongwei, Wang Bin, Ji Zhongzhen, 2002: Application of the Artificial Compression Method to the Simulation of Two-Dimensional Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 863-869. doi: 10.1007/s00376-002-0051-7
[10]	YANG Shuai, GAO Shouting, Chungu LU, 2015: Investigation of the Mei-yu Front Using a New Deformation Frontogenesis Function, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 635-647. doi: 10.1007/s00376-014-4147-7
[11]	Rudi XIA, Yali LUO, Da-Lin ZHANG, Mingxin LI, Xinghua BAO, Jisong SUN, 2021: On the Diurnal Cycle of Heavy Rainfall over the Sichuan Basin during 10–18 August 2020, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 2183-2200. doi: 10.1007/s00376-021-1118-7
[12]	Xu Yinlong, Qian Fenlan, Chen Zhi, Li Shiming, Zhou Mingyu, 2002: Observational Analyses of Baroclinic Boundary Layer Characteristics during One Frontal Winter Snowstorm, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 153-168. doi: 10.1007/s00376-002-0041-9
[13]	Jia Yiqin, Zhao Sixiong, 1994: A Diagnostic Study of Explosive Development of Extratropical Cyclone over East Asia and West Pacific Ocean, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 251-270. doi: 10.1007/BF02658144
[14]	Zipeng YUAN, Xiaoyong ZHUGE, Yuan WANG, 2020: The Forced Secondary Circulation of the Mei-yu Front, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 766-780. doi: 10.1007/s00376-020-9177-8
[15]	Tan Zhemin, Wu Rongsheng, 1994: Helicity Dynamics of Atmospheric Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 175-188. doi: 10.1007/BF02666544
[16]	Lingkun RAN, Changsheng CHEN, 2016: Diagnosis of the Forcing of Inertial-gravity Waves in a Severe Convection System, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 1271-1284. doi: 10.1007/s00376-016-5292-y
[17]	He PAN, Guixing CHEN, 2019: Diurnal Variations of Precipitation over North China Regulated by the Mountain-plains Solenoid and Boundary-layer Inertial Oscillation, ADVANCES IN ATMOSPHERIC SCIENCES, , 863-884. doi: 10.1007/s00376-019-8238-3
[18]	Zhao Ming, 1991: The Effect of Topography on Quasi-Geostrophic Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 8, 23-40. doi: 10.1007/BF02657362
[19]	He Jianzhong, 1993: Linear Momentum Approximation and Frontogenesis Caused by Baroclinic Ekman Momentum Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 103-112. doi: 10.1007/BF02656958
[20]	Wang Chunming, Wu Rongsheng, Wang Yuan, 2002: Interaction of Diabatic Frontogenesis and Moisture Processes in Cold-Frontal Rain-Band, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 544-561. doi: 10.1007/s00376-002-0085-x

PDF

Get Citation+

Export:

Article Metrics

Article Views: 1176 Times

PDF downloads: 977 Times

Cited by: Times

Proportional views

Manuscript History

Manuscript received: 10 April 2000

Manuscript revised: 10 April 2000

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Evolution and Frontogenesis of an Imbalanced Flow —the Influence of Vapor Distribution and Orographic Forcing

1. Laboratory of Mesoscale Severe Weather, Nanjing University, Nanjing 210093,Laboratory of Mesoscale Severe Weather, Nanjing University, Nanjing 210093,Laboratory of Mesoscale Severe Weather, Nanjing University, Nanjing 210093

Manuscript received: 2000-04-10
Manuscript revised: 2000-04-10

Abstract: If the initial fields are not in geostrophic balance, the adjustment and evolution will occur in the stratified fluid, and the frontogenesis will occur under suitable conditions. The evolution is studied here with a nonhydrostatic fully compressible meso-scale model (Advanced Regional Prediction System, ARPS). Four cases are designed and compared: (i) control experiment; (ii) with different initial temperature gradient; (iii) with vapor distribution; (iv) with orographic forcing. The results show that: (1) there is an inertial oscillation in the evolution of the imbalanced flow with the frequency of the local Coriolis f, and with its amplitude de-creasing with time. The stationary balanced state can only be approached as it cannot be reached in the limit duration of time, The energy conversion ratio varies in the range of [0, 1 / 3]; (2) the stronger initial tempera-ture gradient can make the final energy conversion ratio higher, and vice versa; (3) suitable vapor distribu-tion is favorable for the frontogenesis. It will bring forward the time of the frontogenesis, strengthen the in-tensity of the cold front, and influence the final energy conversion ratio; (4) the orographic forcing has an ev-idently strengthening effect on the frontogenesis. The strengthening effect on the frontogenesis and the influ-ence on the final energy conversion ratio depend on the relative location of the mountain to the cold front.

Keywords: