Plateau Meteorology

Plateau Meteorology >

2016 , Vol. 35 >Issue 5: 1327 - 1338

DOI: https://doi.org/10.7522/j.issn.1000-0534.2015.00082

Modeling Analysis of a Severe Autumn/Winter Drought in Eastern China by using Regional Atmospheric Modeling System (RAMS)

  • MENG Chunchun ,
  • MA Yaoming ,
  • MA Weiqiang ,
  • GOU Peng ,
  • BAI Yang
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  • Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;University of Chinese Academy of Sciences, Beijing 100049, China;Chinese Research Academy of Environmental Sciences, Beijing 100012, China

Received date: 2015-03-16

  Online published: 2016-10-28

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Abstract

To testify RAMS'performance on drought events, the simulation of 2008/2009 severe autumn/winter drought event over eastern China was conducted in this study. The RAMS outputs were compared with European Centre for Medium-Range Weather Forecasts (ERA-interim) Reanalysis data and Global Summary of Day (GSOD) observation data respectively. The ERA-interim reanalysis data showed that most parts of the north China were controlled by northwest wind which was accompanied by cold air, the warm and moist air from South Sea is so weak to meet with cold air from the northern region, therefore forming a circulation which is unfavorable for precipitation over Eastern China, and the downward motion and low relative humidity prevailed over the drought area which intensified the drought. RAMS has proven to be capable of reproducing the aforementioned general atmospheric circulation, and RAMS captured the distribution features of the rainfall and air temperature over China authentically. Meanwhile, compared with GSOD observations, RAMS showed good performance on the simulation of precipitation and air temperature time variations over the drought area, both the square of correlation coefficient between simulations and observations of precipitation and that of air temperature reached above 0.8. Although the performance of RAMS on this drought simulation is fairly accurate, the spatial resolution of RAMS simulation needs enhancement and large amount of drought simulations should be completed and contrasted to draw a conclusive evaluation of RAMS capability.

Key words： RAMS; Severe drought; Numerical simulation; Atmospheric circulat; Precipitation and ai

Cite this article

MENG Chunchun , MA Yaoming , MA Weiqiang , GOU Peng , BAI Yang . Modeling Analysis of a Severe Autumn/Winter Drought in Eastern China by using Regional Atmospheric Modeling System (RAMS)[J]. Plateau Meteorology, 2016 , 35(5) : 1327 -1338 . DOI: 10.7522/j.issn.1000-0534.2015.00082

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