The microphysics of ice accretion on wires:Observations and simulations  

作　　者：NIU ShengJie ZHOU Yue JIA Ran YANG Jun LUE JingJing KE YiMing YANG ZhiBiao 

机构地区：[1]Key Laboratory of Meteorological Disaster of Ministry of Education, School of Atmospheric Physics Nanjing University of lnformation Science ＆ Technology, Nanjing 210044, China [2]Hubei Meteorological Bureau, Wuhan 430073, China

出　　处：《Science China Earth Sciences》2012年第3期428-437,共10页中国科学（地球科学英文版）

基　　金：supported by National Key Technology R&D Program of China (Grant No. 2008BAC48B01);National Natural Science Foundation of China (Grant No. 40775012);the Jiangsu Province Qinglan Project for Cloud Fog Precipitation and the Aerosol Research Group;a project funded by the Priority Acadenic Program Development of Jiangsu Higher Education Institutions

摘　　要：The weather system, meteorological conditions, and microphysics of cloud, fog, and rain droplets are studied during the formation, growth, maintenance, and shedding periods of ice accretion on wires in Enshi, Hubei Province in China using 2008/2009 and 2009/2010 winter observations. The comprehensive observations include data of visibility, microphysics of fog and rain droplets, and ice thickness, as well as data from an automated weather station and other routinely recorded meteorological data. The results show that icing occurred during the passage of a cold front, with a high-pressure system and a cold temperature trough at 850 hPa, and a southeasterly at 500 hPa that provided abundant moisture. Ice formation usually started in the evening or early morning, and ice shed around noon the following day when the temperature was -1℃ to 0℃. The averaged liquid water content of the fog droplet was distinctly greater during the growth period than during the other three periods, and there was precipitation during the growth period in each case of ice accretion. The growth rate of the ice thickness was clearly correlated with the liquid water content, with a correlation coefficient of 0.62. Simulations using empirical equations were carried out, and the simulated ice thickness agreed with observations fairly well.The weather system, meteorological conditions, and microphysics of cloud, fog, and rain droplets are studied during the formation, growth, maintenance, and shedding periods of ice accretion on wires in Enshi, Hubei Province in China using 2008/2009 and 2009/2010 winter observations. The comprehensive observations include data of visibility, microphysics of fog and rain droplets, and ice thickness, as well as data from an automated weather station and other routinely recorded meteorological data. The results show that icing occurred during the passage of a cold front, with a high-pressure system and a cold temperature trough at 850 hPa, and a southeasterly at 500 hPa that provided abundant moisture. Ice formation usually started in the evening or early morning, and ice shed around noon the following day when the temperature was-1°C to 0°C. The averaged liquid water content of the fog droplet was distinctly greater during the growth period than during the other three periods, and there was precipitation during the growth period in each case of ice accretion. The growth rate of the ice thickness was clearly correlated with the liquid water content, with a correlation coefficient of 0.62. Simulations using empirical equations were carried out, and the simulated ice thickness agreed with observations fairly well.

关 键 词：ice accretion on wires growth of ice accretion meteorological condition MICROPHYSICS simulation of ice thickness 

分 类 号：P315.7[天文地球—地震学] TM726.3[天文地球—固体地球物理学]