中文摘要：

利用星载激光雷达资料等多种卫星遥感数据,结合大气再分析资料等,对2008年12月4—6日发生在山东半岛北部的一次海效应暴雪云团降雪过程进行了分析。结果表明：（1）暴雪云团发生在东北冷涡西南部对流层中低层强西北冷平流、地面气压场气旋式弯曲的天气背景下。（2）受冷平流作用,对流层中下层降温明显,导致渤海低层大气不稳定度增加,海面风场辐合产生上升运动,并将大量的水汽和热量输送至低层大气,这有利于浅对流的加强,并进一步促进降雪云团的形成。（3）降雪云团虽然为浅对流云,但云系冷中心较强;云团发展旺盛时期的云内平均降雪率为0.41mm/h,且降雪率的大值区表现为强弱相间的条状分布。（4）云团的射出长波辐射通量不仅与云团温度有关,还与云内冰水含量有关,冰水含量越高,射出长波辐射通量越低;在研究云对辐射的影响时,没有降水（雪）的云系和有降水（雪）的云系应该分别考虑,降水（雪）弱的云系和降水（雪）强的云系也应该分别考虑。

英文摘要：

In this study,amount of satellitic remote sensing data and atmosphere reanalysis data were used to study a snowfall by Bohai sea-effect snowfall cloud which occurred in Shandong Peninsula from 4to6,Dec,2008.The study achievement shows that the snow cloud was taking place in the strong northwestly cold flow in the middle-low troposphere southwest the northeast cold vortex,and cyclonic bending on the surface pressure-field.Due to the cold airflow,the temperature in the middle-low troposphere decreased obviously,it resulted in the increasing atmosphere instability in low troposphere over the Bohai Sea,then the sea surface wind would converge to produce upcurrent,ascending motion transported much moisture and heat into the low atmosphere,eventually,it would reinforce the shallow convection,furthermore,it cloud promote the formation of snowfall cloud.Although snowstorm cloud was shallow convective cloud,its cold center was quite strong,during the exuberant period,the average value of snowfall rate was 0.41mm/h,and the heavy snow rate was distributed as alternating strip.The upwelling long wave fluxes on the cloud top was not only related to the temperature,but also related to the ice water content of the cloud,the higher the ice water content of the cloud was,the lower the upwelling long wave fluxes were.When we research the clouds effect on the radiation,we should consider the rainfall（snowfall）strength of the cloud.