非表示:
キーワード:
-
要旨:
In EGU General Assembly 2024, Vienna, Austria & Online, 14-19 April
We provide a global database of SO2 emissions from point sources generated from TROPOMI observations of SO2 (COBRA product) for the time range from May 2018 to July 2022. Our algorithm derives the advection of SO2 by combining TROPOMI SO2 column densities and ERA5 wind fields, i.e., taking the product of the vertical column density gradient and the horizontally projected wind speed. In addition, several corrections, e.g., for satellite sensitivity and topography, are applied. For each point source, error estimates are given, considering the uncertainties of the various retrieval steps.
A fully automated iterative detection algorithm of point sources from around the world forms the basis of our catalog. The catalog includes a list of 130 locations identified as substantial anthropogenic SO2 point sources. Most of these locations are close to power plants included in the Global Power Plant Database (GPPD) or match entries in previously compiled SO2 inventories.
The emissions in our catalog are in good agreement (Pearson correlation coefficient (r) of 0.82) with those recorded in existing SO2 datasets (Fioletov et al., 2023) but are higher by about 36%.
By comparing our SO2 catalog with matches in the global NOx catalog compiled by Beirle et al. (2023), information on the used fuel and applied filtering measures is provided. We observe an SO2 to NOx mass ratio ranging from 0.8 to 141.5 with a mean of about 10 for the selected point sources.
The SO2 catalog was created as part of the World Emission (2022) project, funded by ESA, which focuses on quantifying emissions of different species that can be detected by satellite instruments. The complete SO2 catalog will be made publicly available through the World Emission Portal at https://app.world-emission.com.
