Abstract. Since the launch of TROPOMI on the Sentinel-5 Precursor (S5P) satellite, NO2 observations have become available with a resolution of 3.5× 5 km, which makes monitoring NOx emissions possible at the scale of city districts and industrial facilities. For Europe, emissions are reported on an annual basis for country totals and large industrial facilities and made publicly available via the European Environment Agency (EEA). Satellite observations can provide independent and more timely information on NOx emissions. A new version of the inversion algorithm DECSO (Daily Emissions Constrained by Satellite Observations) has been developed for deriving emissions for Europe on a daily basis, averaged to monthly mean maps. The estimated precision of these monthly emissions is about 25 % for individual grid cells. These satellite-derived emissions from DECSO have been compared to the officially reported European emissions and spatial–temporal disaggregated emission inventories. The country total DECSO NOx emissions are close to the reported emissions and the emissions compiled by the Copernicus Atmosphere Monitoring Service (CAMS). Comparison of the spatially distributed NOx emissions of DECSO and CAMS showed that the satellite-derived emissions are often higher in cities, while they are similar for large power plants and slightly lower in rural areas.

中文翻译：

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监测欧洲人为太空氮氧化物排放


摘要。自Sentinel-5 Precursor（S5P）卫星发射TROPOMI以来，NO2观测分辨率已达到3.5×5km，这使得在城市区域和工业设施规模上监测NOx排放成为可能。对于欧洲，每年报告国家总量和大型工业设施的排放量，并通过欧洲环境署 (EEA) 公开发布。卫星观测可以提供独立且更及时的氮氧化物排放信息。已开发出新版本的反演算法 DECSO（受卫星观测约束的每日排放量），用于导出欧洲每天的排放量，并平均至月平均图。对于各个网格单元，这些每月排放量的估计精度约为 25%。 DECSO 的这些卫星排放量已与官方报告的欧洲排放量和时空分类排放清单进行了比较。该国 DECSO 氮氧化物排放总量接近报告的排放量和哥白尼大气监测服务 (CAMS) 编制的排放量。比较DECSO和CAMS的NOx排放空间分布表明，城市中卫星产生的排放往往较高，而大型电厂的排放量相似，农村地区略低。