Trends in emissions of atmospheric constituents at the global scale: evaluation and improvements using regional inventories

Different emissions inventories have been developed in recent years, which provide emissions of gaseous and particulate atmospheric species for the past decades at both global and regional scales. As part of the Copernicus Atmosphere Monitoring Service, we have developed the CAMS-GLOB-ANT inventory (version 6.2), which provides monthly emissions of 36 chemical compounds at a spatial resolution of 0.1x0.1 degree. The evaluation of the emissions has revealed issues in some regions, particularly for the emissions of nitrogen oxides and sulfur dioxide. To evaluate the dataset in more detail, we have gathered data provided by several inventories for the 2000-2024 period developed for the global as well as for the regional scale. The changes in the emissions provided by these global and regional inventories have been intercompared, and we will discuss the comparisons of the emissions of carbon monoxide, nitrogen oxides, sulfur dioxide and black and organic carbon. We have used different sets of regional emissions for Europe, the USA and China to improve the CAMS-GLOB-ANT dataset. The methodology to build the CAMS mosaic of emissions (CAMS-GLOB-ANT-M1) will be discussed, and comparisons between the improved and the original CAMS global emissions will be presented.