CAJ | 학술논문

利用风廓线资料、探空资料、NCEP1o×1o逐6小时再分析资料和常规观测资料，对2011年11月29~30日影响华北南部的一次低槽冷锋类暴雪天气过程进行了诊断分析，结果表明：(1)东北风急流为干冷性质，850hPa以下冷空气强迫抬升、地形抬升是暴雪的主要触发机制；(2)850hPa-700hPa逆温层的出现和850hPa以下偏东风的增强对降雪的发生、发展有很好的指示意义；在垂直结构上出现了自下而上的湿-干-湿的比湿层结结构；(3)唐山风廓线仪测风计算的温度平流变化及监测到东北风急流的出现对于华北南部暴雪有重要联系，冷平流大值中心的出现对暴雪区发生时段有很好的对应关系。
이용풍곽선자료、탐공자료、NCEP1o×1o축6소시재분석자료화상규관측자료，대2011년11월29~30일영향화북남부적일차저조랭봉류폭설천기과정진행료진단분석，결과표명：(1)동북풍급류위간랭성질，850hPa이하랭공기강박태승、지형태승시폭설적주요촉발궤제；(2)850hPa-700hPa역온층적출현화850hPa이하편동풍적증강대강설적발생、발전유흔호적지시의의；재수직결구상출현료자하이상적습-간-습적비습층결결구；(3)당산풍곽선의측풍계산적온도평류변화급감측도동북풍급류적출현대우화북남부폭설유중요련계，랭평류대치중심적출현대폭설구발생시단유흔호적대응관계。
Based on the wind profile data, sounding data, NCEP1oí1o analysis data, and the conventional observations, the snowstorm process caused by the low trough-cold front system in southern part of North China on 29~30 November 2011 was diagnostically analyzed. The results showed that:(1)850hPa northeasterly wind jet is relatively dry; the forced ascending motion by the cold air and the terrain uplifting is the major trigger mechanism.(2)Inversion layer and the intensified northeasterly are more conductive to the description of the occurrence and development of the snowstorm;Regarding the vertical structure of specific humidity, there was dry and wet change existing from below to above;(3)Temperature advections derived from the wind profile data and the northeasterly wind jet correlated to the time of snowstorm's occurrence, which can be used as an indicator in forecasting snowstorm weather.