華北暴雪的云微物理參數(shù)化方案的比較模擬

doi:10.3969/2012jms.00**

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華北暴雪的云微物理參數(shù)化方案的比較模擬
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                        10.3969/2012jms.00**
                    
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中圖分類號:P435.1
基金項目:國家自然科學項目?

Numerical simulation about a heavy snowfall event in north China: the sensitivity of cloud microphysical parameterization schemes

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摘要:

用MM5模式模擬2004年12月20-23日發(fā)生在華北地區(qū)的一次暴雪天氣的發(fā)生發(fā)展及其演變過程.在四個嵌套網(wǎng)格區(qū)域內分別采用Goddard方案(試驗G)和Reisner 2方案(試驗R)的兩個純顯式冰相云微物理參數(shù)化方案進行試驗.模擬結果表明:試驗G和試驗R均可以較好的模擬暴雪過程中的環(huán)流形勢演變、降雪分布和強度,并且兩個試驗的結果差別不大,但是云中的微物理過程有很大的不同.試驗G的主要云微物理過程包括云水的凝結增長、云冰的凝華增長、云冰初始化、云冰被雪碰并、云水被雪碰并、雪的凝華增長、云冰的Bergeron過程等;而試驗R的主要云微物理過程包括云冰的凝華增長、云冰轉化成雪、雪的凝華增長和霰的凝華增長等.

Abstract:

In this paper, MM5 including several explicit resolvable-scale microphysical parameterizations was used to simulate a heavy snowstorm event that occurred in North China during 20-22 December 2004. Two experiments using the Goddard scheme (experiment G) and Reinser scheme (experiment R) in four nested domains were conducted in order to test the sensitivity of different microphysical parameterization schemes to the simulations of snowfall. The primary results are as the follows: evolvement of circulation and snowfall in this snowstorm are simulated well in both experiment G and experiment R, and the results are similar in both of them. However, the characters of cloud microphysics are different from each other. Cloud ice mixing ratio in experiment G is more than that in experiment R. The dominant cloud microphysical processes in experiment G are condensation growth of cloud water, depositional growth of cloud ice, initiation (nucleation) of cloud ice, accretion of cloud ice by snow, accretion of cloud water by snow, depositional growth of snow, transfer of cloud ice to snow through Bergeron process and so on. 〖JP2〗The dominant cloud microphysical processes in experiment R are depositional growth of cloud ice, conversion of cloud ice to form snow, depositional growth of snow and depositional growth of graupel.

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林文實,孟金平,蒙偉光,樊琦,李江南.華北暴雪的云微物理參數(shù)化方案的比較模擬.氣象科學,2009,(2):150-156 Lin Wenshi, Meng Jinping, Meng Weiguang, Fan Qi, Li Jiangnan. Numerical simulation about a heavy snowfall event in north China: the sensitivity of cloud microphysical parameterization schemes. Journal of the Meteorological Sciences,2009,(2):150-156

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收稿日期:2007-05-10
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