1966-2015年乐亭县暴雪天气过程统计及环流特征  

Statistics and Circulation Characteristics of Heavy Snow in Laoting County from 1966 to 2015

作　　者：郭义涛 楚甜 GUO Yitao(Hebei Xiong’an New Area Meteorological Bureau,Xiong’an,Hebei 071799)

机构地区：[1]河北雄安新区气象局,河北雄安071799

出　　处：《农业灾害研究》2022年第6期80-82,共3页Journal of Agricultural Catastrophology

摘　　要：利用1966—2015年乐亭地区地面气象观测资料和NCEP/NCAR 2.5°×2.5°资料,筛选出近50年乐亭地区暴雪天气过程,统计相关特征,并对产生暴雪天气的天气形势进行分类。通过筛选,共有10次符合条件的暴雪天气过程,平均出现频次为0.2次/年。乐亭地区暴雪天气过程表现为一种低概率事件,无明显变化趋势。对这次暴雪天气过程500 hPa位势高度场和850 hPa风场进行分析后,将产生暴雪天气过程的天气形势分为2类,分别为低槽+切变线型和低槽+低涡型。Based on the surface observation data of Laoting county area from 1966 to 2015 and NCEP/NCAR 2.5°×2.5°data,every process of heavy snow in leting area in recent 50 years was screened,and the weather situation of heavy snow was classified.Through screening,there are 10 qualified heavy snow processes,with an average frequency of 0.2 times/year.The heavy snow process in Laoting area is a low probability event with no clear trend.After analyzing the 500 hPa potential height field and 850 hPa wind field of every heavy snow process,the weather situation producing the heavy snow process is divided into two types:low-pressure trough+shear line type and low-pressure trough+low vortex type.

关 键 词：暴雪 统计 环流形势 

分 类 号：P426.63[天文地球—大气科学及气象学]