GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2018.04.014
Simulation of an extreme heavy rainfall event over Chennai, India using WRF: Sensitivity to grid resolution and boundary layer physics
Srinivas, C., V1; Yesubabu, V2; Prasad, D. Had3; Prasad, K. B. R. R. Hari1; Greeshma, M. M.1; Baskaran, R.1; Venkatraman, B.1
2018-09-15
发表期刊ATMOSPHERIC RESEARCH
ISSN0169-8095
EISSN1873-2895
出版年2018
卷号210页码:66-82
文章类型Article
语种英语
国家India; Saudi Arabia
英文摘要

In this study, the heavy precipitation event on 01 December 2015 over Chennai located on the southeast coast of India was simulated using the Weather Research and Forecast (WRF) model. A series of simulations were conducted using explicit convection and varying the planetary boundary layer (PBL) parameterization schemes. The model results were compared with available surface, satellite and Doppler Weather Radar observations. Simulations indicate strong, sustained moist convection associated with development of a mesoscale upper air cyclonic circulation, during the passage of a synoptic scale low-pressure trough caused heavy rainfall over Chennai and its surroundings. Results suggest that veering of wind with height associated with strong wind shear in the layer 800-400 hPa together with dry air advection facilitated development of instability and initiation of convection. The 1-km domain using explicit convection improved the prediction of rainfall intensity of about 450 mm and its distribution. The PBL physics strongly influenced the rainfall prediction by changing the location of upper air circulation, energy transport, moisture convergence and intensity of convection in the schemes YSU, MYJ and MYNN. All the simulations underestimated the first spell of the heavy rainfall. While YSU and MYJ schemes grossly underestimated the rainfall and dislocated the area of maximum rainfall, the higher order MYNN scheme simulated the rainfall pattern in better agreement with observations. The MYNN showed lesser mixing and simulated more humid boundary layer, higher convective available potential energy (CAPE) and stronger winds at mid-troposphere than did the other schemes. The MYNN also realistically simulated the location of upper air cyclonic flow and various dynamic and thermodynamic features. Consequently it simulated stronger moisture convergence and higher precipitation.


英文关键词Heavy precipitation Low-pressure trough PBL physics Grid resolution WRF
领域地球科学
收录类别SCI-E
WOS记录号WOS:000434903200006
WOS关键词MESOSCALE CONVECTIVE SYSTEMS ; 26 JULY 2005 ; PART I ; MODEL ; PRECIPITATION ; EXPLICIT ; IMPACTS ; MUMBAI ; FLOOD ; FORECASTS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
被引频次:73[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/15255
专题地球科学
作者单位1.Indira Gandhi Ctr Atom Res, Hombi Bhabha Natl Inst, HSEG, Radiol Safety Div, Kalpakkam 603102, Tamil Nadu, India;
2.Govt India, Dept Space, Natl Atmospher Res Lab, Gadanki 517112, Andhra Prades, India;
3.King Abudullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 239556900, Saudi Arabia
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Srinivas, C., V,Yesubabu, V,Prasad, D. Had,et al. Simulation of an extreme heavy rainfall event over Chennai, India using WRF: Sensitivity to grid resolution and boundary layer physics[J]. ATMOSPHERIC RESEARCH,2018,210:66-82.
APA Srinivas, C., V.,Yesubabu, V.,Prasad, D. Had.,Prasad, K. B. R. R. Hari.,Greeshma, M. M..,...&Venkatraman, B..(2018).Simulation of an extreme heavy rainfall event over Chennai, India using WRF: Sensitivity to grid resolution and boundary layer physics.ATMOSPHERIC RESEARCH,210,66-82.
MLA Srinivas, C., V,et al."Simulation of an extreme heavy rainfall event over Chennai, India using WRF: Sensitivity to grid resolution and boundary layer physics".ATMOSPHERIC RESEARCH 210(2018):66-82.
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