利用现场连续监测的方法获取或采用专业气象部门资料以及林业资源二类清查数据的植被资料,运用GlOBEIS模型,对北京地区2011年度植物源挥发性有机物(BVOCs)排放总量进行了估算,同时,也对所研究树种异戊二烯、单萜烯排放量进行了估算.结果表明,BVOCs的排放量分布情况与北京地区植被的分布情况有一定的相关性,并且VOCs的排放情况具有明显的季节依赖性.研究树种类型分为常绿乔木、落叶乔木、灌木、草本花卉,BVOCs排放量最大的依次为油松、苹果树、大叶黄杨和竹.其中,异戊二烯排放量最高为法桐,排放年通量可达313.92 μg· (g·h)-1;单萜烯排放量最高为苹果树,排放年通量可达726.68 μg·(g·h)-1.估算过程中的误差主要来自于植物标准排放因子的获取、叶生物量的计算,气象参数的变化也会给排放清单带来较大的不确定性.
Using the data obtained from continuous monitoring sites or professional meteorological department and Forest Resource Inventory,the total emission of botanical volatile organic compounds (BVOCs) in Beijing in 2011 were estimated by using GlOBEIS model.Emissions of isoprene,monoterpene were estimated at the same time.The results showed there was a certain correlation between distribution of BVOCs emissions and vegetation of the Beijing region,BVOCs emissions had obvious seasonal dependence.Tree species types were divided into evergreen trees,deciduous trees,shrubs,and herbaceous flowers.The amount of BVOCs emissions was in the order of Pinus tabuliformis Carrière＞Malus pumila Mill＞Buxus megistophylla Levi＞Bamboo.The highest normalized isoprene emission rate of 313.92 μg·(g· h)-1 was observed for Platanus orientalis Linn.,and the highest normalized monoterpene emission rate of 726.68 μg· (g·h)-1 was observed for Malus pumila Mill.Calculation errors mainly resulted from plant standard emission factors,leaf biomass calculations as well as changes in meteorological parameters.
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