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大气科学  2006 

数值模式不同分辨率和地形对东亚降水模拟影响的试验

DOI: 10.3878/j.issn.1006-9895.2006.02.01

Keywords: 东亚降水,区域气候模式,分辨率,地形

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Abstract:

为探讨东亚地区降水数值模拟中水平分辨率和地形的作用,使用RegCM2区域气候模式,采用不同的模式分辨率和地形,对东亚降水进行对比模拟试验.结果表明,东亚地区降水的模拟效果取决于模式的水平分辨率,模式分辨率越高,模拟的效果越好.使用实际地形的模拟效果好于使用平滑地形的.但同时,使用较高分辨率的平滑地形的模拟,效果好于使用次高分辨率的实际地形的模拟.这表明在东亚地区降水模拟中,分辨率与地形相比,起着至少同样重要的作用.结果指出,对东亚地区降水的模拟而言,使用60km及以上分辨率可能是必需的.

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