Plateau Meteorology

Plateau Meteorology >

2018 , Vol. 37 >Issue 6: 1535 - 1543

DOI: https://doi.org/10.7522/j.issn.1000-0534.2018.00054

Analysis of Effects of Lake and Upstream Orography on the Precipitation in Fall over Nam Co Area

  • XU Jie ,
  • MA Yaoming ,
  • SUN Fanglin ,
  • MA Weiqiang
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  • Key Laboratory of Land-surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Tibetan Environment Change and Land Surface Process. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China

Received date: 2018-03-09

  Online published: 2018-12-28

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Abstract

This paper analyzed the distribution of monthly averaged precipitation from 1992 to 2015 around Nam Co area by using CMFD (China meteorological forcing data) and the frequency of foehn from 1995 to 2015 by using wind and air temperature data from Nam Co station(Nam Co Station for Multisphere Observation and Research, Chinese Academy of Sciences). The results showed that the spatial lake-effect precipitation is most significant in fall, and foehn is the most frequent in December. And in October, the frequency of foehn is the most in fall. Then we simulated precipitation over Nam Co area in October using WRF. We found that under the background of air circulation, lake can affect the precipitation over Nam Co area more significantly than upstream orography. Comparing no lake experiment with control experiment, we can conclude that the exist of Nam Co lake can make surrounding area, especially downstream area, more precipitation and the effect distance can be 100 km. Upstream orography can enhance precipitation but the effect is little, and foehn has little effect on the precipitation in areas downstream of the lake.

Key words： Nam Co area; precipitation; foehn; upstream orography

Cite this article

XU Jie , MA Yaoming , SUN Fanglin , MA Weiqiang . Analysis of Effects of Lake and Upstream Orography on the Precipitation in Fall over Nam Co Area[J]. Plateau Meteorology, 2018 , 37(6) : 1535 -1543 . DOI: 10.7522/j.issn.1000-0534.2018.00054

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