气象科学2017，Vol.37Issue(3)：283-292,10.DOI:10.3969/2016jms.0027
一次飑线过程的云微物理参数化方案数值试验及其成因分析
Simulation experiments of cloud microphysical parameterization schemes on a squall line and its genesis analysis
摘要
Abstract
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.关键词
飑线/云微物理/参数化/WRF/水成物粒子Key words
Squall line/Cloud microphysics/Parameterization/WRF/Moisture variables分类
天文与地球科学引用本文复制引用
许广,费建芳,黄小刚,姜勇强,程小平..一次飑线过程的云微物理参数化方案数值试验及其成因分析[J].气象科学,2017,37(3):283-292,10.基金项目
国家自然科学基金资助项目(41230421,41275099) （41230421,41275099）
国家重点基础研究发展计划(973 计划)项目(2013CB430101) （973 计划）
