An improved gridded polycyclic aromatic hydrocarbon (PAH) emission inventory for the lower reaches of the Yangtze River Delta (YRD) region from 2001 to 2015 was developed using satellite data. Despite rapid increases in energy consumption, the annual total emissions of the 16 PAHs showed overall decreasing trends, from a maximum of 5445 t in 2001 to a minimum of 2619 t in 2015, with the largest decline (84.6%) observed in the residential sector. Different spatial allocation methods used in gridded PAH emission inventories have substantial influences on the distributions of PAHs; therefore, we improved the accuracy of the spatial allocation of industrial and open biomass burning PAH emissions using various satellite data. The gridded secondary and tertiary industrial GDP (GDP₂₃) calculated using corrected nighttime light data was the best spatial proxy for the spatial allocation of industrial PAH emissions in the YRD region. We generated a gridded burned area for 2001–2015 by coupling the MCD64A1 and MCD14ML fire products, which was used to allocate PAH emissions from open biomass burning. Finally, we found that changes in the spatial distribution of PAH emissions were mainly driven by energy consumption and degree of technological advancement in different regions during 2001–2015.

利用卫星数据，对2001年至2015年长三角下游地区的改进的网格化多环芳烃（PAH）排放清单进行了开发。尽管能耗快速增加，但16个PAH的年度总排放量呈总体下降趋势，从2001年的5445吨最大减少到2015年的2619吨最小，其中住宅领域的最大减少量（84.6％） 。网格化PAH排放清单中使用的不同空间分配方法对PAHs的分布有很大影响。因此，我们使用各种卫星数据提高了工业和露天生物质燃烧PAH排放的空间分配精度。网格化的第二产业和第三产业GDP（GDP ₂₃使用校正后的夜间光数据计算的）是长三角地区工业PAH排放空间分配的最佳空间替代。我们通过耦合MCD64A1和MCD14ML火灾产品生成了2001-2015年的网格化燃烧区域，该燃烧产品用于分配露天生物量燃烧过程中的PAH排放量。最后，我们发现2001-2015年间，不同地区的PAH排放空间分布的变化主要由能源消耗和技术进步程度驱动。