1961〜2020年曲麻莱县日照时数变化特征  

VARIATION CHARACTERISTICS OF SUNSHINE DURATION IN QUMALAI AREA DURING 1961-2020

作　　者：包海义 韩方昕 BAO Hai-yi(Yushu City Bureau of Meteorology,Jiegu Qinghai 815000,China)

机构地区：[1]玉树市气象局,青海结古815000

出　　处：《青海草业》2021年第4期55-59,共5页Qinghai Prataculture

摘　　要：利用曲麻莱县气象局1961~2020年60 a的月日照时数资料,运用线性倾向估计和MTT方法对该地区日照时数的变化特征进行了分析研究,结果表明:曲麻莱县的年日照时数最多值为3000.8 h,最少值为2147.7 h,年最多值与年最少值相差853.1 h。曲麻莱县的年曰照时数明显减少,气候倾向率为-22.785 h/10a,60 a中共减少了136.71 h;四季的曰照时数除了冬季呈增加趋势之外,其余季节均有所减少,秋季的减少幅度最小,夏季的减少幅度最大,其气候倾向率分别为-6.044、-11.121 h/10a。近60 a来各月曰照时数减少最多的月份是6月,其次是5月;增加最多的月份是2月,其次是1月。Using the monthly observation sunshine duration data from 1961 to 2020 at Qumalai meteorological station,the characteristics of sunshine duration and its spatial distribution were analyzed by the methods of linear tendency estimation and MTT test.The results show that the highest annual sunshine duration in QuMaLai was 3000.8 hours,the lowest was 2147.7 hours,853.1 hours separated the highest and the lowest sunshine duration.The annual sunshine duration has a significant decreasing tendency with 22.7845 hours per decade,almost decreased 136.7 hours in total in 60 years.The seasonal sunshine duration has a decreases except for in winter which has a little increasing tendency,the decreasing range in summer was minimum and has the maximum in spring with the decreasing tendency of 6.044 hours per decade and 11.121 hours per decade.In the past 60 years,the monthly sunshine duration reduced the most occurs in June firstly,then in May and increased the most occurs in February firstly,then in January.

关 键 词：日照 变化特征 线性倾向估计 突变检验 

分 类 号：S433[农业科学—农业昆虫与害虫防治]