【摘要】 基于本地化改进的GLOBEIS模型,运用遥感图像解译的土地利用类型数据以及实际观测的小时气象数据,对天津市2013年植被排放VOCs进行了估算和时空分布特征分析。结果表明,天津市2013年植被排放VOCs总量为7 678.35t C,其中,异戊二烯的排放量为693.43t,占9.0%;单萜烯的排放量为2 877.80t,占37.5%;其他VOCs的排放量为4 107.12t,占53.5%。在时间分布上,植被VOCs的排放具有明显的日变化和月变化特征:中午高,夜间低;8月份最高,1月份最低。在空间分布上,其空间分布特征与土地利用类型密切相关,植被VOCs排放主要集中在林区较为密集的区域,在蓟县北部排放量较大,在滨海新区和市内6区排放量较小。最后,对植被VOCs排放估算过程中的不确定性来源进行了分析。更多还原

【Abstract】 The GLOBEIS model was utilized to analyze biogenic VOCs(BVOCs) emission in Tianjin and its temporal and spatial distribution in 2013,based on meteorological data and the remote-sensing image of land use. The results showed that the annual total emission amount of biogenic VOCs in Tianjin was about 7 678. 35t(C) in which isoprene accounted for 693. 43t(9. 0%),monoterpenes accounted for 2 877. 80t(37. 5%) and other VOCs accounted for 4 107. 12t(53. 5%). The biogenic VOCs emission had strong day and month characteristics with maximum emissions in mid-day and the August,while the minimum occurred at night and in the January. The spatial distribution of BVOCs emission mainly depends on land use,mostly located in dense forest area. High emissions were usually found in north region of Ji County,while low emissions were usually found in Binhai New Area and urban. The uncertainty sources of estimatimating BVOCs emissions in Tianjin were also discussed in the final part.更多还原