主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报

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1951-2008年辽宁冰雹的时空分布特征

刘晓梅1; 李晶1;戴萍1;刘明2;魏楠1   

  1. 1.沈阳区域气候中心,辽宁 沈阳 110016;2.辽宁省信息与技术保障中心,辽宁 沈阳,110016
  • 收稿日期:2009-06-24 修回日期:2009-08-23 出版日期:2009-10-28 发布日期:2009-10-28

Temporal-spatial distribution of hail disaster from 1951 to 2008 in Liaoning province

LIU Xiao-mei1;LI Jing1;DAI Ping1;LIU Ming2;WEI Nan1   

  1. 1. Shenyang Regional Climate Center, Shenyang 110016, China; 2.Liaoning Provincial Information and Technology Support Center, Shenyang 110016, China
  • Received:2009-06-24 Revised:2009-08-23 Online:2009-10-28 Published:2009-10-28

摘要: 选取1951-2008年辽宁省56个站气象资料和中国气象灾害大典等资料,对冰雹时空分布进行了统计分析。结果表明:辽宁冰雹日数以山地为最多,丘陵次之,平原和沿海最少。移动路径基本与山脉、河流、海岸线等地形走向一致。冰雹具有明显的季节变化,主要出现在4-10月。5-6月为冰雹多发期,6月为最多,5月次之。近30a辽宁省年冰雹日数呈减少趋势。冰雹发生主要集中在中午至傍晚。辽西走廊、辽宁中部平原及辽东半岛南部大连地区为冰雹灾害重点防御区。产生冰雹的天气系统按高空形势分类主要有4种:冷涡、冷涡后部横槽、高空槽和槽后西北气流,对应地面形势多为低压冷锋。

关键词: 冰雹, 强度路径, 时空分布, 灾害, 综合指标, 辽宁

Abstract: Based on the data from 56 weather stations in Liaoning province from 1951 to 2008 and Chinese meteorological disaster dictionary, the temporal-spatial distribution of hail disaster was analyzed. The results indicate that the hail often happens in the mountains, followed by the hilly areas, then the plain and the coastal areas. The moving track of hail is identical to lay of the land such as mountains, river or coast line. The seasonal change of hail is obvious, and hail often occurs from April to October. Most hails happen in May and June, especially in June. The days of hail decease during the recent 30 years. Hail usually occurs from the noon to the evening. The key areas of hail prevention include Liaoxi corridor, the plain of midlle Liaoning and Dalian of southern Liaodong island. According to the high level situation classification, weather systems forming hail include cold vortex, cold vortex rear horizontal trough, high level trough and trough rear northwest air current, and the corresponding ground situation is low pressure cold front.

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