近50年中国天山日照时数变化及其影响因素

干旱区研究 ›› 2011, Vol. 28 ›› Issue (3): 485-491.

近50年中国天山日照时数变化及其影响因素

辛宏¹, 张明军^1,2, 李瑞雪¹, 高文华¹

1. 西北师范大学地理与环境科学学院, 甘肃兰州 730070;
2. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000

收稿日期:2010-04-20 修回日期:2010-07-01 出版日期:2011-06-25 发布日期:2011-09-06
作者简介:辛宏(1985-),女,河北沧州人,在读硕士研究生,主要从事全球环境变化方面的研究工作
基金资助:
教育部新世纪优秀人才支持计划(NCET-10-0019);国家自然科学基金项目 (40701035, 40631001, 40571033);陇原青年创新人才扶持计划;西北师范大学知识与科技创新工程创新团队项目(NWNU-KJCXGC-03-66);科研骨干培育项目(NWNU-KJCXGC-03-78)

Analysis on the Change of Sunshine Duration and Its Affecting Factors in the Tianshan Mountains in Recent 50 Years

XIN Hong¹, ZHANG Ming-jun^1,2, LI Rui-xue¹, GAO Wen-hua¹

1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China;
2. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2010-04-20 Revised:2010-07-01 Published:2011-06-25 Online:2011-09-06

摘要/Abstract

摘要： 采用气候倾向率方法,对天山24个站1960-2009年逐月日照时数进行统计分析,并在ArcGIS环境下通过IDW插值法分析日照时数变化的空间分异。结果表明:近50年天山山区年日照时数表现为极显著的减少趋势,气候倾向率为-32.9 h/10 a,其中春季略有增加,冬季减少最为明显,夏、秋季均为缓慢的减少趋势。20世纪60年代天山年日照时数为正距平,仅春季日照偏少;70年代均为正距平,以秋季最为明显;80年代春、冬季日照充足,夏、秋季日照偏少,年日照时数为负距平;20世纪90年代和21世纪初年日照时数均为负距平,尤其以90年代的冬季最为明显;2000-2009年秋、冬季日照偏少,春、夏季日照偏多,日照时数有所增加。20世纪60年代年日照时数出现了异常偏多年份,90年代发生了异常偏少年份。年日照时数的变化与降水量和云量的多少有关。

关键词: 日照时数, 异常年份, 降水量, 云量, 气候倾向率, 天山山区

Abstract: In this paper, the annual and seasonal trend variation of sunshine duration in the Tianshan Mountains in China is analyzed using linear trend analysis based on the data of monthly sunshine duration, mean cloudage and precipitation from 24 meteorological stations in the mountains from 1960 to 2009. By using the method of IDW under ArcGIS, the spatial distribution of sunshine duration is analyzed so as to research the regional difference. The results show that the average annual sunshine duration in the Tianshan Mountains was significantly decreased in recent 50 years with a decreasing rate of 32.9 h/10 a. The change of seasonal sunshine duration was different, and the sunshine duration was decreased with a rate of-19.4 h/10 a in winter but increased with a rate of 0.7 h/10 a in spring. In addition, the sunshine duration in the 1960s was long in summer, autumn and winter, but short in spring. The positive anomaly of sunshine duration occurred in all seasons in the 1970s, especially in autumn. The sunshine duration was long in spring and winter but short in summer and autumn, and a negative anomaly of annual sunshine duration occurred in the 1980s. During the period from the 1990s to the beginning of the 21st century, the annual sunshine duration was short, especially in winter of the 1990s. Since the 21st, the sunshine duration was short in autumn and winter, but it was slightly increased in spring and summer. Moreover, more anomalous years of annual sunshine duration occurred in the 1960s, whereas less ones occurred in the 1990s. The results reveal that the change of sunshine duration is related to precipitation and cloudage.

Key words: sunshine duration, anomalous year, precipitation, cloudage, linear tread, Tianshan Mountains

中图分类号:

P468

辛宏, 张明军, 李瑞雪, 高文华. 近50年中国天山日照时数变化及其影响因素[J]. 干旱区研究, 2011, 28(3): 485-491.

XIN Hong, ZHANG Ming-jun, LI Rui-xue, GAO Wen-hua. Analysis on the Change of Sunshine Duration and Its Affecting Factors in the Tianshan Mountains in Recent 50 Years[J]. , 2011, 28(3): 485-491.

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