高寒矮嵩草草甸地面热源强度及与生物量关系的初步研究

Primary Study on Surface Heating Field and Biomass in Alpine Kobresia Meadow in the Qinghai-Tibetan Plateau

在青藏高原海北高寒矮嵩草草甸地区,依据2002年涡度相关法观测的能量平衡各分量资料和6-10月植物地上、地下生物量测定值,分析了高寒矮嵩草草甸近地表热量平衡、地面热源强度的变化特征,讨论了地面热源强度与植物生物量季节变化过程中的相互关系。结果表明:在青藏高原海北高寒矮嵩草草甸地区,年内地面均为热源,热源强度季节变化明显,地面热源强度年平均为88.5 W/m2;地上生物量季节变化与热源强度具有显著的正相关关系,而地下生物量季节变化与热源强度关系不明显。

Based on the data measured by the eddy covariance method in 2002, we analyzed the seasonal variations of the surface heating field, energy balance, aboveground biomass and belowground biomass of the kobresia alpine meadow in the Northern Qinghai-Tibetan Plateau. The results showed that the surface of the alpine meadow ecosystem was heat resources. There was evidently seasonal variation in heating field, whose annual mean value was with 88.5Wm^ -2 in 2002. Both aboveground biomass and belowground biomass had seasonal variations as well as. There was positive correlation between aboveground biomass and heating field, while there was not significant relationship between belowground biomass and heating field.