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UP: Fachverband Umweltphysik

UP 6: Poster Session

UP 6.4: Poster

Freitag, 3. September 2021, 16:30–18:30, P

Challenges and progress in the analysis of satellite-based measurements of methane in the Arctic — •Jonas Hachmeister, Matthias Buschmann, Justus Notholt, John P. Burrows, Oliver Schneising, and Michael Buchwitz — Universität Bremen, Deutschland

With the launch of the Sentinel-5 Precursor mission, carrying the TROPOMI instrument, an unprecedented high spatio-temporal resolution of the column-averaged mole fraction of various gases was made possible, e.g. methane (XCH4). Especially in the northern high-latitude regions, where few ground stations and in-situ measurements are available, this data promises new ways of understanding the methane distribution and variation on large scales. In addition to the operational Copernicus S5P XCH4 data product developed by SRON, the scientific WFMD algorithm data product was generated at the Institute of Environmental Physics at the University of Bremen. Comparisons of both products show significant differences, which are not yet well understood and their evaluation proves difficult due to the limited opportunities of validation because ground-based measurements, e.g. from TCCON and NDACC, are sparse in the Arctic. In this poster contribution we show comparisons with measurements from ground-based stations and different satellite XCH4 data products.