2010~2019年张家口地区降雪天气分型

Classification of Snowfall Weather in Zhangjiakou from 2010 to 2019

摘要: 基于张家口市14个地面气象观测站2010~2019年气象观测资料、张家口市气象台存储天气个例资料、河北省气象台灾害性天气个例库暴雪资料，结合NCEP再分析资料，对近年张家口地区共79次降雪天气过程做个例分型，结果表明：1) 该地区降雪天气过程主要出现在当年11月至次年3月，11月最多为2.2次/年，12月最少只有0.9次/年；2) 该地降雪过程大致可分为四个类型：西风槽东移型、北涡南槽型、横槽型和回流型；3) 西风槽东移型出现次数最多，北涡南槽型次之，横槽型最少；4) 回流型降雪过程降雪量级明显要大于其它降雪类型。

Abstract: Based on the meteorological observation data of 14 surface meteorological stations in Zhangjiakou from 2010 to 2019, the weather case data stored in Zhangjiakou meteorological station, and the blizzard data stored in the disastrous weather case database of Hebei meteorological station, combined with NCEP reanalysis data, 79 snowfall weather processes in Zhangjiakou area in recent years were classified. The results show that: 1) the snowfall process mainly occurs from November of the current year to March of the next year, with the maximum of 2.2 snowfalls per year in November and the minimum of 0.9 snowfalls per year in December. 2) The snowfall process can be divided into four types: westerly trough eastward moving type, North vortex South trough type, transverse trough type and reflux type. 3) The westerly trough eastward type appears most frequently, fol-lowed by the North vortex South trough type and the transverse trough type. 4) The snowfall magnitude of return snowfall is obviously larger than that of other snowfall types.