一次夏季东北冷涡中积云发展过程的数值模拟  

A NUMERLCAL SIMULATION OF CUMULUS FEATURES ON NORTHEAST COLD VORTEX

作　　者：耿树江[1] 王建捷[2] 宫福久[1] 

机构地区：[1]辽宁省人工影响天气办公室,沈阳110016 [2]中国气象局国家气象中心,北京100081

出　　处：《气象科学》2006年第2期149-156,共8页Journal of the Meteorological Sciences

基　　金：辽宁省科技厅社会公益研究专项基金项目(编号:2001210001);"十五"国家科技公关重大计划项目(编号:2001BA610A-06-09)共同资助

摘　　要：运用中国科学院大气物理所设计开发的三维冰雹云模式,对2002年7月11日至15日期间,发生在中国东北地区的一次由冷涡天气诱发的积云对流变化过程进行三维数值模拟。模拟结果表明:(1)冷涡诱发的积云自然降水呈中小尺度复合体的特征;(2)积云起源于低层暖湿区域里,并由强上升气流抬升到高层,得到充分发展;(3)冷涡中积云同样存在液态水累积区,一般出现在最大上升气流上,其中液态水含量随着积云的发展而变化,冰雹即在此液态水累积区0℃以下的区域内生长;(4)在模拟区域内,模拟出了多个积云单体的并合现象,而后发展为积云团;(5)模拟出的积云形态与雷达回波基本吻合。Using a 3D hailstorm cloud model of Institute of Atmospheric Physics of Chinese Academy of Science, some features of cumulus-rainstorm evolvement brought by cold vortex occurring in the northeast zone of China from July 11 to 15,2002 are simulated. It shows that there is a feature of meso-small scale cumulus complex brought by cold vortex. Cumulus originates from a warmer zone of low layer and gains to grow due to strong updraft. There is an accumulation zone of super-cooled rainwater in the coldvortex cumulus. Amount of super-cooled rainwater is generally accumulated above the position of the maximum updraft and changes with time. Hail develops in this zone. In the simulating area, many of single cumulus is united and formed a cumulus ensemble. There is a similar shape between the simulated cumulus and radar echo.

关 键 词：夏季东北冷涡 冰雹云模式 积云演变 液态水累积区 

分 类 号：P456[天文地球—大气科学及气象学]