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冰川冻土  2012 

青海高原不同生态功能区气候突变时间的比较分析

, PP. 1388-1393

Keywords: 青海高原,气温,降水,气候突变,比较

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Abstract:

根据地理位置和地貌特征将青海省划分为东部农业区、环青海湖区、三江源区和柴达木盆地4个生态功能区,利用这4个生态功能区1961—2010年的月平均气温和降水量资料,对年和四季的平均气温及总降水量进行了突变检测.结果表明4个生态功能区年平均气温和四季气温都呈显著的上升趋势,其中冬季气温上升最明显,其次为秋季,春季和夏季相对较小.气温突变时间检测表明,年平均气温为柴达木盆地的突变时间最早,其次为东部农业区和环湖区,三江源区突变时间最晚.不同生态功能区四季气温突变时间不尽相同.年降水量除柴达木盆地上升趋势明显外,其余三个地区变化趋势都不明显;四季降水量变化趋势除冬季降水量变化明显(除东部农业区)外,其余三季变化趋势基本不明显.降水量突变信号较气温突变信号弱,只有个别地区的个别季节降水量发生了突变.

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