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冰川冻土  2013 

兰州马衔山多年冻土区地表能量平衡特征分析

DOI: 10.7522/j.issn.1000-0240.2013.0038, PP. 320-326

Keywords: 能量平衡,净辐射,气象梯度法,多年冻土,马衔山

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Abstract:

利用兰州马衔山多年冻土区2010年7月1日到2011年6月30日的气象资料,采用气象梯度法计算了该地区的感热通量和潜热通量,结合净辐射分析了该地区的地表能量平衡特征.结果表明马衔山多年冻土区净辐射呈现明显的年变化特征,净辐射值较青藏高原西大滩地区略大,而较唐古拉地区小;净辐射冬春季主要转化为感热,而夏秋季主要转化为潜热,这一特点与青藏高原唐古拉和西大滩地区类似;潜热年平均值略大于感热年平均值,这与马衔山多年冻土区沼泽湿地的保护作用及充足的水分条件有关.此外,地下冰的存在有效地保护了该地区的多年冻土.

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