中文摘要：

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.

英文摘要：

The sensible and latent fluxes from 1st July,2010 to 30th June,2011 in permafrost region of the Mahan Mountain were calculated by using meteorological-gradient approach.At the same time,the characteristics of the surface energy balance were analyzed in combination with net radiation.It is found that: The net radiation in this region has significant annual variation,a little more than that in Xidatan and less than that in Tanggula of the Tibetan Plateau;the net radiation in permafrost region of Mahan Mountain mainly converts into sensible heat in winter and spring,and converts into latent heat in summer and autumn,similar to the characteristics of annual variation of sensible heat flux and latent heat flux in the permafrost regions of the Tibetan Plateau;the annual average latent heat flux is a little more than the sensible heat flux in permafrost region of Mahan Mountain,because of the protective effect of marsh landscape and adequate moisture condition in this region.In addition,the existence of underground ice protects the permafrost effectively in the region.