干旱区生态环境知识资源中心(Arid): 1960年至2005年河西干旱区的日照时数变化时空特征分析以黑河中上游地区为例

Arid

	1960年至2005年河西干旱区的日照时数变化时空特征分析以黑河中上游地区为例
其他题名	Analysis of Temporal and Spatial Characteristics of Sunshine Duration Change in Hexi Arid Region: A Case Study of Heihe River Valley in the Middle Region of Hexi Corridor
	刘艳艳; 张勃; 张耀宗; 康淑媛
ISSN	1007-7588
出版年	2009
卷号	31 期号:9 页码:1581-1586
中文摘要	运用复值Morlet小波分析及非参数统计检验Mann-kendall法,并借助地统计软件ArcGIS(9.X)时黑河中上游1960年～2005年日照时数变化的时空特征进行了分析.结果表明:①近50年来年均日照时数呈现增加趋势,beta值为18.57;眷、夏、秋、冬四季日照时数均为上升趋势,beta值分别为7.13、7.72、3.18和6.96;②年、季节的日照时数变化在空间上存在差异,对于年均日照时数而言,酒泉、金塔、鼎新一线为日照时数升降的分界线,以北为主要的上升趋势区,升幅大于8.0h/年;以南则主要表现为下降趋势,降幅在(1.9～31.5)h/年;③日照时数年变化具有12年左右的主振荡周期和5年左右的次振荡周期,年代际特征明显.日照时数在1975年开始由显著增加趋势变为不明显的减少趋势;④年、夏冬两季日照时数的变化主要是大气中云量变化引起的,而春秋两季日照时数变化的原因还需进一步探讨.
英文摘要	This paper analyzes the temporal and spatial characteristics of sunshine duration change in recent 50 years in Heihe River Valley, which is located in the Middle of Hexi Corridor. Morlet wavelet analysis and non-parametric statistical methods, such as Mann-kendall and Geostatistic software ArcGIS (9.X) are employed. The results show that in the study area, the annual average sunshine duration increases at an average rate of 18.77h/a in recent 50 years, but this tendency is not significant. In addition, the tendency is different from most other areas in China. The increasing tendency occurs throughout the four seasons with rates of 7.13h/a, 7.72h/a, 3.18h/a and 6.96h/a from spring to winter. Annual and seasonal changing trends of sunshine duration in Heihe River Valley exhibited spatial variation. In term of annual mean sunshine duration, Jiuquan, Jinta and Dingxin were the boundary of sunshine duration change. There was an increasing tendency in the north of Hexi corridor, and the changing range of sunshine duration was above 8.0h/a, while sunshine duration in the south decreased by about 1.9~31.5h/a. Moreover, annual sunshine duration change in Heihe River Valley also exhibited temporal variation. Put ascensive central Jinta was regarded as the center for increase in sunshine duration, while Gaotai was described as the center for decrease. Jinta exhibited increasing tendency in 1960s, but from the beginning of 1970s to the middle of 1980s, sunshine duration in Jinta displayed a downtrend. After that, it demonstrated an increasing tendency again. In 1960s, there was a slight increasing tendency in Gaotai, but at the beginning of the 1970s, sunshine duration decrease noticeably. From the beginning of 1980s to the middle of 1990s, sunshine duration in Gaotai showed an obvious increasing tendency. After the middle of 1990s, sunshine duration in Gaotai kept decreasing. Sunshine duration change in Heihe River Valley fluctuated with a cycle of 12 years and a subordinate cycle of 5 years, and it exhibited inter-decadal oscillation. There was a sudden change in sunshine duration in 1975, after which the increasing trend turned to a decreasing tendency. The significant changes can mean that cloudage led to the variation in annual and seasonal change of sunshine duration in the study area. The causation of sunshine duration change in spring and autumn is not covered in this paper and needs further study.
中文关键词	干旱区 ; 日照时数 ; 时空特征 ; 趋势分析 ; 周期 ; 黑河中上游地区
英文关键词	Arid area Sunshine duration Trend analysis Cycles Heihe River Valley
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3708353
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/2XILL650/224645
作者单位	西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	刘艳艳,张勃,张耀宗,等. 1960年至2005年河西干旱区的日照时数变化时空特征分析以黑河中上游地区为例[J]. 西北师范大学,2009,31(9):1581-1586.
APA	刘艳艳,张勃,张耀宗,&康淑媛.(2009).1960年至2005年河西干旱区的日照时数变化时空特征分析以黑河中上游地区为例.,31(9),1581-1586.
MLA	刘艳艳,et al."1960年至2005年河西干旱区的日照时数变化时空特征分析以黑河中上游地区为例".31.9(2009):1581-1586.