西北地区冰雹时空分布特征  

Temporal and Spatial Distribution Characteristics of Hail in Northwest China

作　　者：赵红岩[1] 宁惠芳 徐金芳 董安祥[3] 李青燕 

机构地区：[1]兰州中心气象台,甘肃兰州730020 [2]甘肃省气象信息中心,甘肃兰州730020 [3]中国气象局兰州干旱气象研究所,甘肃兰州730020

出　　处：《干旱气象》2005年第4期37-40,共4页Journal of Arid Meteorology

基　　金：科技部2002年社会公益研究项目"西北地区人工防雹技术"(2002DIB10046)资助

摘　　要：应用1991～2000年西北地区基本站资料,统计分析了西北地区降雹的时空分布特征.结果表明:西北地区降雹主要的高频区在青藏高原中部、祁连山和天山山脉西段,并呈带状分布,多雹中心一般位于东西走向山脉的南坡,南北走向山脉的东坡.西北地区降雹旬、侯分布不均匀,产生双-多峰特征,从多雹区各代表站的旬或候际演变看,高原北部降冰雹来的比其南部早且持续时间长,但降雹日数明显少于其南部.天山山脉、祁连山降雹盛发期处于波动状态而高原中部降雹盛发期比较集中.Based on the climatic data of ten years （ 1991 - 2000）, the spatial -temporal distribution characteristics of hail in Northwest China are analyzed. The result show that the hail distribution is in belt patterns and the main hail zone is in the middle part of Tibetan plateau, Qilian mountain and the west part of Tianshan mountain, the more frequent centre is in the south side along the east - west mountains and the east side along the north - south mountains, the date occurring hails in the north part of Tibetan Plateau is earlier than that in the south part of the plateau and the hail duration is long, but the hail days are fewer than that in the south part of the plateau from the curves of decadal and pentad evolution of hail days.

关 键 词：西北地区 冰雹 时空分布 

分 类 号：P456.3[天文地球—大气科学及气象学]