Emissions is a crucial background datum of Air Pollution Control. In order to grasp the entire trend, the National Air Emission Data was originally scheduled to be updated every three years; the previous version [TEDS6.1] of the National Air Emissions, completed in year 2006, was based on the emissions data of 2003. The key task of the current year planning is to update a new base year emissions for the new version of TEDS. According to the original plan, the base year for the update version was 2006; however, thanks to the advancement of e-data evolution, most of the 2007 data are already available, which comply more realistically with the current status. After discussion, it was decided to take 2007 data as the base-year data for the update. The estimation of pollutants included TSP, PM10, PM2.5, SOx, NOx, THC/NMHC, CO and Pb. The updating task mainly involved estimation and distribution of Air Emission with a finer spatial resolution, including plants with coordinates, and area emissions and line emissions with 1-km grids distribution. The fugitive paved road dust and fugitive riverbed exposure emissions were updated by the supplementary data carried out in last year’s preliminary study, so as to elevate accuracy of these estimations. At the same time, referencing the updated 2007 emissions, a trend modification was carried out by tracing back to the early years and estimating the coming year’s forecast, so as to be used as references of future control planning applications. Regarding the inquiry applications of the Emission Data, Internet on-line query was adopted in the project, with systems respectively established based on Google Earth for inquiry of spatial distribution of plants and their emissions, and on GIS for inquiry of point sources emissions and of grid emission distribution of area sources and line sources, providing authorities with more convenient inquiry tools of the background emission data. In the application review of the Air Pollution Cost Control System of the AirControlNet (ACN, established by the US EPA), we tried to link the domestic emission data to relevant forms established in ACN system and calculate the control reduction cost of domestic emissions using unit costs per ton given in that system, so as to establish preliminary processing procedures for applying the AirControlNet within our country. Such costs(unit costs per ton by control mesures) shall be gradually replaced in the future with actual survey results carried out within our country. In the project, there were also several relevant routine tasks, including estimation of air degradation in the national green GDP, assisting review and statistical analysis of the 2008 city/county SIP assessment in air-quality improvement index, data updating of the relevant webpage, and a provision for technical and administrative assistance.

TEDS7.0, point source, area source, line source, biogenic source, emission spatial distribution, emission time series, air degradation, reduction control cost