近60年黄南州南部牧区雪灾特征研究  

A Study on the Characteristics of Snow Disasters in the Pastoral Areas of Southern Huangnan Prefecture in Recent 60 Years

作　　者：彭英超 陈晶 唐仲涛 PENG Ying-chao(Huangnan Meteorological Bureau of Qinghai Province,Tongren,Qinghai 811399)

机构地区：[1]青海省黄南州气象局,青海同仁811399 [2]青海省气象防灾减灾重点实验室,青海西宁81000 [3]青海省海北州气象局,青海西海810299

出　　处：《农业灾害研究》2021年第9期84-86,88,共4页Journal of Agricultural Catastrophology

摘　　要：利用1961-2020年共60年的雪灾实际灾情资料、地面观测气象要素资料等,采用气候统计方法和天气诊断分析等方法,研究分析60年黄南南部两县的雪灾时空分布特征、雪灾变化趋势、天气环流特征等。得到结论:(1)泽库与河南发生雪灾频次相差不大,而轻灾在雪灾发生中占比较大,占总雪灾次数的70%左右;(2)1961-2020年轻度、中度、重度3种等级雪灾发生次数都呈现减少趋势,其中轻灾递减趋势最明显;(3)前冬、后冬、春季降雪累积量都呈减少趋势,后冬减少趋势最不明显,春季通过0.05显著性检验水平;(4)黄南南部出现中雪量级以上的高空环流形势主要有4类,分别是两槽一脊型、西高东低型、纬向环流型和两脊一槽型,其中两槽一脊型为主要系统类型。In this paper, the spatial and temporal distribution characteristics of snow disasters, the variation trend of snow disasters and the characteristics of weather circulation in the two counties of southern Huangnan were analyzed by using the climate statistical method and weather diagnostic analysis method based on the data of actual snow disasters and meteorological elements observed on the ground during 1961-2020.The conclusions are as follows :(1) there is no significant difference in the frequency of snow disasters between zeku and henan,and light disasters account for 70% of the total number of snow disasters.(2) From 1961 to 2020, the number of snow disasters of young degree, moderate degree and severe degree all showed a decreasing trend, and the decreasing trend of light snow disasters was the most obvious.(3) The snowfall accumulation in pre-winter, post-winter and spring all showed a decreasing trend, and the decreasing trend was the least obvious in post-winter. Spring passed the significance test level of 0.05.(4) There are four types of upper air circulation over the southern Part of Huangnan, which are two trough and one ridge type, high west and low east type, zonal circulation type and two ridge and one trough type, among which two trough and one ridge type is the main system type.

关 键 词：黄南南部 雪灾 变化趋势 环流特征 

分 类 号：P429[天文地球—大气科学及气象学]