CAJ | 학술논문

2009年11月10日08：00—11日14：00，宁夏全区迎来了立冬后第一场雪，降雪量2．0～33．7mm，其中，吴忠以北普降暴雪，永宁站降雪量（33．7mm）最大，12h和24h降雪量为全区30a之最。本文利用常规气象资料、宁夏本地化中尺度数值预报（MM5）模式产品，对本次降暴雪的天气环流背景、影响系统及中小尺度系统等进行分析。结果表明：这次中北部暴雪具有明显的中小尺度系统特征。主要影响系统有700hPa兰州的低涡、偏南气流、地面中β尺度、河套锢囚锋和地面回流，为此次暴雪提供了有利的水汽和动力条件。
2009년11월10일08：00—11일14：00，저하전구영래료입동후제일장설，강설량2．0～33．7mm，기중，오충이북보강폭설，영저참강설량（33．7mm）최대，12h화24h강설량위전구30a지최。본문이용상규기상자료、저하본지화중척도수치예보（MM5）모식산품，대본차강폭설적천기배류배경、영향계통급중소척도계통등진행분석。결과표명：저차중북부폭설구유명현적중소척도계통특정。주요영향계통유700hPa란주적저와、편남기류、지면중β척도、하투고수봉화지면회류，위차차폭설제공료유리적수기화동력조건。
The first snow in the winter of 2009 occurred over Ningxiafrom 08:00 on 0th lto 14:00 on 11th November in 2009 and the precipitation was from 2.0 mm to 33.7 mm. The observed biggest snowfall (33.7 mm) in Wuzhong and its north was at Yongning Station, the accumulated precipitation for 12h and 24h was the biggest in the past 30 years. In this paper, the circulation background, influencing systems and meso-scale systems were analyzed by using conventional meteorological data and the outputting products of local meso-scale numerical prediction model MM5 in Ningxia. The results showed that the obvious meso-scale systems caused the snowstorm event, the main influencing systems were Lanzhou vortex at 700 hPa, ground Meso-β-scale systems, Hetao occluded front, south airflow at 700 hPa and the south airflow at the back of ground high pressure provided beneficial vapor and dynamic conditions for the maintaining of snowfall.