Plateau Meteorology

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2017 , Vol. 36 >Issue 2: 340 - 357

DOI: https://doi.org/10.7522/j.issn.1000-0534.2016.00041

Study of Boundary Layer Parameterization Schemes' Applicability of WRF Model over Complex Underlying Surfaces in Southeast Tibet

  • LI Fei ,
  • ZOU Han ,
  • ZHOU Libo ,
  • MA Shupo ,
  • LI Peng ,
  • ZHU Jinhuan ,
  • ZHANG Yu
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  • Department of Lower Atmosphere Observation Research, Institute of Atmospherics, Chinese Academy of Sciences, Beijing 100029, China;State Key Laboratory of Atmospheric boundary layer physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2015-11-30

  Online published: 2017-04-28

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Abstract

Southeast Tibet is the typical representative of complex underlying surfaces of the Qinghai-Tibetan Plateau, the boundary layer processes above this region are quite complex, which greatly challenge modeling and numerical weather forecasting. Accurate simulation and forecasting of local atmospheric processes depend on the choice of boundary layer parameterization scheme. In this study, the Weather Research and Forecasting model (WRF) was employed to simulate the convective and stable atmospheric boundary layer processes of Nyingchi district, Tibet. By comparing with the results from comprehensive campaign "Observation on the surface-to-air Exchange Processes in the Southeast Himalayas" (OSEP) carried out during the summer of 2013, the 5 boundary layer schemes ACM2, Boulac, MYJ, QNSE, and YSU from WRF model were evaluated for their applicability above complicated underlying surface in southeast Tibet. The results indicate that Boulac scheme and MYJ scheme perform the best on convective and stable boundary layer vapor mixing ratio simulation, respectively. ACM2 scheme is a more preferable parameterization scheme on potential temperature and wind filed vertical structure simulation over the complex underlying surface of southeast Tibet. Convective boundary layer height simulated by all schemes are lower than observations; While QNSE simulation shows the minimum deviation. Simulation ability of the same boundary layer parameterization scheme on convective boundary layer and stable boundary layer are different. Boundary layer wind field in this region is greatly weakened by orography. Near surface wind speed simulated are weaker than observation, MYJ and QNSE parameterization scheme shows the best result.

Key words： The Qinghai-Tibetan; Atmospheric boundary; WRF model; Boundary layer param

Cite this article

LI Fei , ZOU Han , ZHOU Libo , MA Shupo , LI Peng , ZHU Jinhuan , ZHANG Yu . Study of Boundary Layer Parameterization Schemes' Applicability of WRF Model over Complex Underlying Surfaces in Southeast Tibet[J]. Plateau Meteorology, 2017 , 36(2) : 340 -357 . DOI: 10.7522/j.issn.1000-0534.2016.00041

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