干旱区生态环境知识资源中心(Arid): 1959年至2008年石羊河流域日照时数时空变化特征

Arid

	1959年至2008年石羊河流域日照时数时空变化特征
其他题名	Changes of Sunshine Duration over the Shiyang River Basin during the Last 50 Years
	康淑媛 1; 张勃 2; 郭玉刚 2; 郭玲霞 2; 王兴梅 2
来源期刊	资源科学
ISSN	1007-7588
出版年	2011
卷号	33 期号:3 页码:483-488
中文摘要	利用石羊河流域气象站点1959年-2008年的逐日、逐月、逐年的日照时数观测资料, 应用非参数统计检验Mann-kendall法分析研究区日照时数的变化趋势, 复值Morlet小波法分析研究区日照时数的周期变化, 并在A rcGIS环境下分析了研究区日照时数的空间分异. 结果表明: ①近50a来流域年日照时数呈现不明显的增加趋势, 变化趋势(beta)值为1.78; 四季日照时数均为增加趋势, 其中以春季增加为主; ②日照时数变化存在25a的主振荡周期和5~8a左右13a左右的次振荡周期; ③日照的空间分布特点是北部城区日照时间长, 南部山区日照时间短, 中部走廊平原的日照等值线大概和纬线平行; ④暗岛效应在一定程度上影响了城区日照时数的变化, 气溶胶、降水量、排放物等的变化以及地形因素的影响都会在一定程度上导致流域日照时数发生变化
英文摘要	Sunshine duration is one of the most important climatic factors affecting economy and terrestrial ecosystems. Increasing evidence have indicated that temporal and spatial variations in sunshine duration have been taking place at global, regional, and local scales over the past few centuries. A further understanding of the mechanisms responsible for variability in sunshine duration at different spatio-temporal scales is highly desired. The authors analyzed the temporal and spatial characteristics of changes in sunshine duration during the period 1959-2008 across the Shiyang River basin. A variety of approaches(e.g., Morlet wavelet analysis and non-parametric statistical methods)were used to reveal the spatial structural patterns and the variability characteristics in sunshine duration at different timescales and trends in sunshine duration and its spatial distribution. Time series of monthly and annual sunshine duration records from 5 weather stations during the period 1959-2008 were used to perform the analysis. Results show that the annual average sunshine duration generally increased at an average rate of 8.16h/10a over the recent 50 years, but this tendency was not significant at thealpha=0.1 significant level(beta=1.78).In addition, the tendency was different from most other areas in China. The sunshine duration also exhibited an increasing tendency at seasonal scales. The sunshine duration in the Shiyang River basin fluctuated with a cycle of 25 years and a subordinate cycle of 5-8 years and 13 years, exhibiting inter-decadal oscillations. As far as the spatial distribution is concerned, the long duration of sunshine occurred in northern mountains but the sunshine duration over the southern mountains was generally short. The Wu shaoling station showed the minimum observation of sunshine duration, while the Minqin station recorded the maximum observation of sunshine. Dark island effects in part affected changes in sunshine duration of cities. It was found that the dark island effect contributed 49%to the changes in the sunshine duration of this region. Aerosol, precipitation, and topographic variations could be ascribed to jointly result in the changes in sunshine duration. Additionally, the temporal-spatial patterns of sunshine duration across desert areas showed an especially strong influence on climate processes. These processes control the spatial structures of the desert vegetation community and evolution of the plants
中文关键词	石羊河流域 ; 日照时数 ; 趋势分析 ; 周期 ; 空间分布
英文关键词	Shiyang River basin Sunshine duration Trend analysis Cycles Spatial distribution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENERGY FUELS
WOS研究方向	Energy & Fuels
CSCD记录号	CSCD:4162524
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227645
作者单位	1.西北师范大学地理与环境学院, 中国科学院沙漠与沙漠化重点实验室, 兰州, 甘肃 730070, 中国; 2.西北师范大学地理与环境学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	康淑媛,张勃,郭玉刚,等. 1959年至2008年石羊河流域日照时数时空变化特征[J]. 西北师范大学,2011,33(3):483-488.
APA	康淑媛,张勃,郭玉刚,郭玲霞,&王兴梅.(2011).1959年至2008年石羊河流域日照时数时空变化特征.资源科学,33(3),483-488.
MLA	康淑媛,et al."1959年至2008年石羊河流域日照时数时空变化特征".资源科学 33.3(2011):483-488.