【摘要】 2002年12月雨淞与2003年1月6日飘雪过程其强度都是近20年少见的,通过对两次过程的环流形势、气象要素等进行对比分析,找出其影响系统及演变过程相同点:都要有较强的冷空气影响及伴有液态降水。不同点:飘雪要求由500hPa—地面均有<0℃的深厚冷层。雨凇预报着重700hPa的增温和850hPa的降温。更多还原

【Abstract】 The strength of glaze and snowing weather in Dec. 2002 and on Jan. 6, 2003 is rare in the recent 20 years’ history in the city. Similarities and differences in its influencing system and evolvement are concluded through comparison analysis of circumfluence situation and other meteorological elements in these two weather processes: strong cold air and liquid state precipitation are their similarities. While they differs in that snowing requires a<0℃ deep cold layer on 500hPaground and forecast of a glaze weather has its emphasis in 700hPa temperature rise and a 850hPa temperature drop.更多还原