摘要
利用环青海湖地区8个气象站1961~2019年,日最低气温观测资料,借助线性倾向估计法、GIS空间分析法、M-K突变检验法等,分析该区生长季霜冻变化特征,探讨其对农牧业生产的影响。结果表明:近59a环青海湖地区作物生长季霜冻日数以-4.2d/10a的气候倾向率显著减少;1997年前后出现减少突变,突变前后相差14.2d;空间变化上,东南减少较慢,西北减少较快,减少最快的地区位于天峻县南部,达到-8.8d/10a;霜冻出现频率呈西北高、东南低的分布规律,重霜冻发生频率为4.2%,中霜冻及轻霜冻发生频率分别为6.0%、12.3%,而霜冻发生频率减少幅度为轻霜冻>重霜冻>中霜冻。总体上,霜冻日数逐年减少,生长季气候条件向有利于农作物和牧草生长的方向发展,对农牧业生产影响较为有利。
Using the minimum temperature observation data of 8 weather stations around Qinghai Lake on a days1961~2019,With the help of linear tendency estimation,GIS spatial analysis,M-K mutation test,Analysis of the characteristics of frost in growing season,To explore its impact on agricultural and animal husbandry production.The results showed that the climatic inclinations of crop growth season frost date of near 59 a ring Qinghai Lake area decreased significantly by-4.2 d/10 a;There were reduced mutations around 1997,14.2 d;before and after mutation Space changes,Slower reduction in the southeast,The North-west is declining faster,The fastest-decreasing area is in the southern part of Tianjun County,-8.8 d/10 a;achieved The frequency of frost is high in northwest and low in southeast,The frequency of heavy frost is 4.2%,The frequency of middle frost and light frost was 6.0%,12.3%,Frost frequency is reduced by light frost>Heavy Frost>Medium frost.Overall,The number of frost days is decreasing year by year,The climatic conditions of growing season develop in a direction conducive to the growth of crops and forage,The impact on agricultural and animal husbandry production is more favorable.
作者
何生录
梅朵
HE Sheng-lu(Qinghai Geermu Province Meteorological Bureau,Geermu Qinghai 816099,China)
出处
《青海草业》
2020年第4期34-37,50,共5页
Qinghai Prataculture
关键词
生长季
霜冻
特征
影响
环青海湖地区
Growing season
Frost
Characteristics
Influence
Area around Qinghai Lake
