| 1959年至2008年石羊河流域日照时数时空变化特征 |
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| 引用本文： | 康淑媛,张勃,郭玉刚,郭玲霞,王兴梅.1959年至2008年石羊河流域日照时数时空变化特征[J].资源科学,2011,33(3):483-488. |
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| 作者姓名： | 康淑媛 张勃 郭玉刚 郭玲霞 王兴梅 |
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| 作者单位： | 1. 西北师范大学地理与环境学院,兰州,730070;中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,兰州,730000
2. 西北师范大学地理与环境学院,兰州,730070 |
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| 基金项目： | 公益性行业(气象)科研专项(编号：GYHY200806021-07)；中国科学院知识创新工程重要方向项目(编号：KZCX2-YW-Q10-4)；生态经济学省级重点学科(编号：5001-021)；西北师范大学学生学术科研基金资助(编号：10736-2007-1104)。 |
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| 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ArcGIS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(β)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。
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| 关 键 词： | 石羊河流域 日照时数 趋势分析 周期 空间分布 |
| 收稿时间： | 7/5/2010 12:00:00 AM |
Changes of Sunshine Duration over the Shiyang River Basin during the Last 50 Years |
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| KANG Shuyuan,ZHANG Bo,GUO Yugang,GUO Lingxia and WANG Xingmei.Changes of Sunshine Duration over the Shiyang River Basin during the Last 50 Years[J].Resources Science,2011,33(3):483-488. |
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| Authors: | KANG Shuyuan ZHANG Bo GUO Yugang GUO Lingxia and WANG Xingmei |
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| Institution: | Geographic and Environmental Sciences Department of Northwest Normal University, Lanzhou 730070, China; China Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;Geographic and Environmental Sciences Department of Northwest Normal University, Lanzhou 730070, China;Geographic and Environmental Sciences Department of Northwest Normal University, Lanzhou 730070, China;Geographic and Environmental Sciences Department of Northwest Normal University, Lanzhou 730070, China;Geographic and Environmental Sciences Department of Northwest Normal University, Lanzhou 730070, China |
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| Abstract: | 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 ... |
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| Keywords: | Shiyang River basin Sunshine duration Trend analysis Cycles Spatial distribution |
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