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地理科学  2014 

1960~2005年西北地区低云量的时空变化及成因分析

, PP. 635-640

Keywords: 低云量,西北地区,交叉小波分析

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Abstract:

基于西北地区177个站点1960~2005年逐日的低云量观测资料,运用地统计学、交叉小波分析和多元回归分析,分析了近46a来西北地区低云量的时空变化特征及影响因素。结果表明近46a来西北地区低云量呈较显著上升趋势,1997年之后上升显著。低云量空间呈自东南向西北递减的趋势。低云量与降水、相对湿度等呈显著的正相关,与昼夜温差、日照时数等呈显著的负相关。低云量存在2~4a、准6a、准11a的周期变化,与宇宙射线在1982~1993年存在5~8a的共振周期,与NOI指数存在2~4a、准5a、准11a的共振周期,和太阳黑子的共振周期为9~11a。

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