College of Environmental Sciences & Engineering, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing, China.
Environ Pollut. 2013 Nov;182:157-68. doi: 10.1016/j.envpol.2013.06.042. Epub 2013 Jul 31.
Aiming to reduce the large uncertainties of biogenic volatile organic compounds (BVOCs) emissions estimation, the emission inventory of BVOCs in China at a high spatial and temporal resolution of 36 km × 36 km and 1 h was established using MEGANv2.1 with MM5 providing high-resolution meteorological data, based on the most detailed and latest vegetation investigations. BVOC emissions from 82 plant functional types in China were computed firstly. More local species-specific emission rates were developed combining statistical analysis and category classification, and the leaf biomass was estimated based on vegetation volume and production with biomass-apportion models. The total annual BVOC emissions in 2003 were 42.5 Tg, including isoprene 23.4 Tg, monoterpene 5.6 Tg, sesquiterpene 1.0 Tg, and other VOCs (OVOCs) 12.5 Tg. Subtropical and tropical evergreen and deciduous broadleaf shrubs, Quercus, and bamboo contributed more than 45% to the total BVOC emissions. The highest biogenic emissions were found over northeastern, southeastern, and southwestern China. Strong seasonal pattern was observed with the highest BVOC emissions in July and the lowest in January and December, with daily emission peaked at approximately 13:00 or 14:00 local time.
为了降低生源挥发性有机化合物（BVOCs）排放估算中的较大不确定性，本研究利用 MM5 提供的高分辨率气象数据，基于最详细和最新的植被调查，采用 MEGANv2.1 建立了中国高时空分辨率（36km×36km 和 1h）的 BVOC 排放清单。首先计算了中国 82 种植物功能类型的 BVOC 排放。通过统计分析和类别分类，结合开发了更多本地化的特定物种排放率，利用基于植被体积和产量的生物量分配模型估算了叶片生物量。2003 年中国的总年 BVOC 排放量为 425 万吨，其中异戊二烯 234 万吨，单萜 56 万吨，倍半萜 10 万吨，其他 VOCs（OVOCs）125 万吨。亚热带和热带常绿和落叶阔叶灌木、栎属和竹子对总 BVOC 排放的贡献超过 45%。东北、东南和西南中国的生物排放量最高。BVOC 排放具有明显的季节性变化，7 月排放量最高，1 月和 12 月最低，日排放量峰值出现在当地时间 13:00 或 14:00 左右。
