祁连山地区日照时数气候变化特征
Climate Change Characteristics of Sunshine Hours in Qilian Mountains Area
李全平 1高君元 1朱宝文2
作者信息
- 1. 青海省海晏县气象局,青海海晏812200
- 2. 青海省西宁市气象台,青海西宁810003
- 折叠
摘要
利用祁连山中部腹地门源、祁连、托勒、野牛沟4站1961-2013年逐月日照时数,采用线性倾向估计、滑动平均、Mann-Kendall检验等方法,分析近53年祁连山地区日照时数变化特征及影响因子.结果表明,53年来祁连山地区年日照时数呈减少趋势,减少幅度为14.35 h/10 a,最高值与最低值的差值为316.8 h.20世纪70年代末—90年代初期为日照时数偏多的年份,21世纪以来年日照时数偏少.5月份年内日照时间最长,2月份年内日照时间最短.光照时间的长短受海拔、纬度及太阳高度角的影响最大.连阴雨天气对日照时数影响最为明显.
Abstract
By using monthly sunshine hours of Menyuan,Qilian,Tuole,Yeniugou in central hinterland of Qianlian Mountains area during 1961 -2013,adopting methods of linear tendency estimation,moving average,Mann-Kendall test,the variation features of sunshine hours and influential factors were analyzed.The sunshine hours of 53 years in Qilian Mountains area showed a decreasing trend with an amplitude of 14.35 h/10 a,the difference between the highest and lowest value was 316.8 h.From the end of 1970s to the early 1990s,sunshine hours in Qilian Mountains area was more than that of 21st Century.May was the longest month in sunshine hours during the year while Feb.was the shortest.The duration of illumination is influenced significantly by altitude,latitude and solar altitude.The effect of continuous rainy weather on sunshine hours is the most obvious.
关键词
日照时数/变化特征/祁连山地区Key words
Sunshine hours/Variation features/Qilian Mountains area引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据