Accounting for surface reflectance spectral features in TROPOMI methane retrievals

Lorente, Alba; Borsdorff, Tobias; Martinez-Velarte, Mari C.; Landgraf, Jochen

doi:https://doi.org/10.5194/amt-16-1597-2023

Articles | Volume 16, issue 6

https://doi.org/10.5194/amt-16-1597-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-16-1597-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 6

Research article

|

28 Mar 2023

Research article |

| 28 Mar 2023

Accounting for surface reflectance spectral features in TROPOMI methane retrievals

Alba Lorente, Tobias Borsdorff, Mari C. Martinez-Velarte, and Jochen Landgraf

Data sets

SRON S5P - RemoTeC scientific TROPOMI XCH4 dataset v19_446 Alba Lorente, Tobias Borsdorff, Mari C. Martinez Velarte, and Jochen Landgraf https://doi.org/10.5281/zenodo.7766558

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Short summary

In the TROPOMI methane data, there are few false methane anomalies that can be misinterpreted as enhancements caused by strong emission sources. These artefacts are caused by features of the underlying surfaces that are not well characterized in the retrieval algorithm. Here we improve the representation of the surface reflectance dependency with wavelength in the forward model, removing the artificial localized CH₄ enhancements found in several locations like Siberia, Australia and Algeria.