一次颮線過程的云微物理參數(shù)化方案數(shù)值試驗(yàn)及其成因分析

doi:10.3969/2016jms.0027

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一次颮線過程的云微物理參數(shù)化方案數(shù)值試驗(yàn)及其成因分析
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                        10.3969/2016jms.0027
                    
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基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目（41230421，41275099）；國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃（973計(jì)劃）項(xiàng)目（2013CB430101）

Simulation experiments of cloud microphysical parameterization schemes on a squall line and its genesis analysis

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利用WRF模式6種適合高分辨率且包含多種固態(tài)水成物粒子的云微物理參數(shù)化方案，分別對(duì)2012年5月16日江蘇北部一次颮線過程進(jìn)行數(shù)值試驗(yàn)，結(jié)果表明：LIN方案模擬的颮線回波反射率、強(qiáng)降水TS評(píng)分、結(jié)構(gòu)和強(qiáng)度等均要優(yōu)于其余5種微物理參數(shù)化方案。分析不同參數(shù)化試驗(yàn)結(jié)果中不同水成物粒子占比隨時(shí)間的變化特征，并針對(duì)LIN方案采取敏感性試驗(yàn)和水成物轉(zhuǎn)化微物理過程分析指出，在此次颮線過程中的各水成物粒子中，霰/雹粒子占比最大，是降水過程中最重要的粒子；地面降水直接來源是雨水，雨水主要來源于中層霰/雹粒子的融化，小部分來源于云水的自動(dòng)轉(zhuǎn)化；中層霰/雹粒子最主要來源是通過雨霰轉(zhuǎn)化過程中的雨水撞凍冰雹微物理過程，其次是霰撞凍云水的微物理過程，而冰相物質(zhì)雪晶和云冰的碰并、撞凍和自動(dòng)轉(zhuǎn)化過程微乎其微。

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Six cloud microphysical parameterization schemes of WRF model with high resolution and multiple moisture variables are conducted to numerically simulate a squall line in the northern Jiangsu on May 16, 2012. Results show that the echo reflectance, TS scores about heavy rain, structures and strength of the mimetic squall line simulated by LIN scheme are obviously superior to the other five cloud microphysical schemes. Moreover, the variation trend characteristics of moisture variables over time in different cloud microphysical parameterization schemes were analyzed and several sensitivity experiments in allusion to LIN scheme were carried out to clarify the microphysical transform process among different moisture variables. Experimental results show that the mixing ratio of graupel or hail is the maximum in all moisture variables and is the most important part of this squall line. Rainwater, originated mainly from the melting process of graupel and hail at the middle level and partly from cloud water, is the direct source of surface rain. The primary moisture variables, namely graupels or hails, are transformed from the conversion of raindrops to graupels or hail due to rain accretion. The accretion of drop water by graupels is the secondary contribution. As for the collection and accretion processes between cloud ice and snow as well as the autoconvertion, they are considered as negligible in the graupel and hail formation.

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許廣,費(fèi)建芳,黃小剛,姜勇強(qiáng),程小平.一次颮線過程的云微物理參數(shù)化方案數(shù)值試驗(yàn)及其成因分析.氣象科學(xué),2017,37(3):283-292 XU Guang, FEI Jianfang, HUANG Xiaogang, JIANG Yongqiang, CHENG Xiaoping. Simulation experiments of cloud microphysical parameterization schemes on a squall line and its genesis analysis. Journal of the Meteorological Sciences,2017,37(3):283-292

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收稿日期:2015-10-27
最后修改日期:2016-04-20
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在線發(fā)布日期: 2017-08-08
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抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说