海北高寒草甸生态系统定位站辐射气候特征

以2000-03到2001-02的辐射观测资料,分析了海北高寒草甸生态系统定位站地区辐射及各分光辐射的变化特征,将为高寒草甸生态系统的物质循环、能量流动、草地生产力形成机制等问题的研究提供科学依据。结果表明:海北站区Eg、Er、UV、PAR、NIR和En具有明显的日、年变化,年内其总量分别达6 278.867 M J/m2、1 515.139 M J/m2、311.242 M J/m2、2 576.777 M J/m2、3 397.404 M J/m2和2 542.950 M J/m2,其中在植物生长期的5~9月分别为3 181.215 M J/m2、698.021 M J/m2、165.955 M J/m2、1 133.965 M J/m2、1 673.871 M J/m2和1 668.805M J/m2。年内Er、UV、PAR、NIR和En占Eg的比例分别为0.242、0.048、0.410、0.540和0.410,在植物生长期分别为0.219、0.052、0.413、0.528和0.527。对Eg和PAR提出了下列形式的模拟求算式:Eg=Eg0(0.0897 0.9768S/S0)和PAR=-3.804 4 0.417 7Eg,模拟效果较好,可利用有关常规气象观测资料进行估算。

The Climate Characteristics of Radiation of Haibei Alpine Meadow Ecosystem Research Station

The radiation and its changing pattern of Haibei Station were analyzed by the observational data from March,2000 to February,2001,which will provide the scientific proofs for the research of material cycle,energy flow,forming mechanism of grassland productivity,and so on.The results showed as below.Eg,Er,UV,PAR,NIR and Enreached to 6 278.867 MJ/m~(2);1 515.139 MJ/m~(2);311.242 MJ/m~(2);2 576.777 MJ/m~(2);3 397.404 MJ/m~(2)and 2 542.950 MJ/m~(2),respectively,in a year,with the obvious daily and annual change.In the plant growing season from May to September,Eg,Er,UV,PAR,NIR and Enreached to 3 181.215 MJ/m~(2);698.021 MJ/m~(2);(165.955) MJ/m~(2);1 133.965 MJ/m~(2);1 673.871 MJ/m~(2) and 1 668.805 MJ/m~(2),respectively.The proportions of Er,UV,PAR,NIR in Egwere 0.242;0.048;0.410;0.540 and 0.410,respectively,in a year while those were(0.219),(0.052),0.413,0.528 and 0.527,respectively,in plant growing season.The simulated equations on Egand PAR were as below:Eg=Eg_(0)(0.0897 0.9768S/S_(0)),PAR=-3.8044 0.4177Eg.They had a good simulating significance and we can estimated them by general data of meteorological observation.