[1]华维,董一平,范广洲,等.青藏高原年日照时数变化的时空特征[J].山地学报,2010,(01):21.
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青藏高原年日照时数变化的时空特征()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2010年01期
页码:
21
栏目:
山地学报
出版日期:
2010-01-15

文章信息/Info

作者:
华维;董一平;范广洲;
成都信息工程学院高原大气与环境四川省重点实验室;
关键词:
青藏高原; 年日照时数; 时空特征; 旋转主成分分析; 小波分析
文献标志码:
A
摘要:
利用青藏高原地区68个测站1973～2007年近35a的日照时数资料,采用主成分分析、旋转主成分分析、小波分析等方法对年日照时数变化的时空特征进行了分析。结果表明:1.青藏高原年日照时数呈现东南部较少,逐渐向西北地区增加的特征,近35a青藏高原西部、西藏西南部和青海西南部年日照时数呈增加趋势,其余地区以减少趋势为主。第一载荷向量场反映了全区日照时数较一致的偏多或偏少;第二三载荷向量场分别反映了高原日照时数南北相反变化以及中部与西部、北部相反变化的差异。2.青藏高原年日照时数空间异常区可分为7个,即高原东南区、高原北部区、高原中部区、藏东区、青海北部区、藏西南区和高原西部区。高原北部和中东部年日...

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更新日期/Last Update: 2010-01-15