27 Feb 2023
 | 27 Feb 2023
Status: this preprint is currently under review for the journal ESSD.

Improved catalog of NOx point source emissions (version 2)

Steffen Beirle, Christian Borger, Adrian Jost, and Thomas Wagner

Abstract. We present an updated (v2) catalog of NOx emissions from point sources as derived from TROPOMI measurements of NO2 (PAL product) combined with wind fields from ERA5. Compared to version 1 of the catalog, several improvements have been introduced to the algorithm. Most importantly, several corrections are applied, accounting for the effects of plume height on satellite sensitivity, 3D topographic effects, and the chemical loss of NOx, resulting in considerably higher and more accurate NOx emissions. In addition, error estimates are provided for each point source, taking into account the uncertainties of the individual retrieval steps.

The catalog v2 is based on a fully automated iterative detection algorithm of point sources worldwide. It lists 1139 locations that have been found to be significant NOx sources. The majority of these locations match to power plants listed in the global power plant database (GPPD). Other NOx point sources correspond to cement plants, metal smelters, industrial areas, or medium-sized cities.

The emissions listed in v2 of the catalog show good agreement (within 20 % on average) to emissions reported by German Environment Agency (Umweltbundesamt, UBA) as well as the United States Environmental Protection Agency (EPA). The data is publically available at (Beirle et al., 2023).

Steffen Beirle et al.

Status: open (until 24 Apr 2023)

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Steffen Beirle et al.

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Catalog of NO_x point source emissions (version 2) Steffen Beirle, Christian Borger, Adrian Jost, and Thomas Wagner

Steffen Beirle et al.


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Short summary
We present a catalog of nitrogen oxide emissions from point sources (like power plants or metal smelters) based on satellite observations of NO2 combined with meteorological wind fields.