三江平原毛果苔草湿地物理过程——能量环境的基本特征

从整个生长季(1999-04-30～09-30)来分析,到达毛果苔草湿地生态系统的太阳辐射能总量约为2673.06MJ/m2.太阳总辐射在一天内不同时间段累积呈现出单峰型曲线(抛物线型);分光辐射总量呈明显的单峰曲线(抛物线型),在分光辐射的几个分量中,光合有效辐射的分配比总是最大,其次是红外辐射,最小的是紫外辐射.净辐射主要与下垫面的季节性植被季相有关,生长初期与生长末期较大,而生长旺盛期较小. 

The Physical Process of Carex Lasiocarpa Wetland in Sanjiang Plain: The Basic Characteristic of Energy Environment

In the view of the whole growth season(from April 30,1999 to September 30,1999),the whole sunshine radiant energy reaching \%Carex lasiocarpa\% wetland ecosystem is about 2 673 06 MJ/m 2 .The accumulation of the whole sunshine radiant energy presents singlet type(parabola type)in different time in a day;the overall spectroradiation also presents obvious singlet type(parabola type) in different time in a day;and in parts of the spectroradiation,the distribution coefficient of photosynthesis availability radiation(PAR) is always biggest,with net infrared radiation(NIR) in the next place and ultraviolet radiation(UR) the smallest.The net radiation is correlative to the vegetation seasonal phase in this zone,which is bigger in the initial stage and the last stage and smaller in the flush stage.