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Publikationstyp
Wissenschaftlicher Artikel
Erscheinungsjahr
2021
A pragmatic protocol for characterising errors in atmospheric inversions of methane emissions over Europe
A pragmatic protocol for characterising errors in atmospheric inversions of methane emissions over Europe
Autor:innen
Herausgeber
Quelle
Tellus / publ. by the International Meteorological Institute in Stockholm
73 (2021), Heft 1
73 (2021), Heft 1
Schlagwörter
Methan, Inversion, Europa
Zitation
SZÉNÁSI, Barbara, Antoine BERCHET, Grégoire BROQUET und Anja KIESOW, 2021. A pragmatic protocol for characterising errors in atmospheric inversions of methane emissions over Europe. Tellus / publ. by the International Meteorological Institute in Stockholm [online]. 2021. Bd. 73 (2021), Heft 1. DOI 10.60810/openumwelt-1969. Verfügbar unter: https://openumwelt.de/handle/123456789/3308
Zusammenfassung englisch
This study aims at estimating errors to be accounted for in atmospheric inversions of methane (CH4) emissions at the European scale. Four types of errors are estimated in the concentration space over the model domain and at selected measurement sites. Furthermore, errors in emission inventories are estimated at country and source sector scales. A technically ready method is used, which is implemented by running a set of simulations of hourly CH4 mixing ratios for 2015 using two area-limited transport models at three horizontal resolutions with multiple data sets of emissions and boundary and initial conditions as inputs. The obtained error estimates provide insights into how these errors could be treated in an inverse modelling system for inverting CH4 emissions over Europe. The main results show that sources of transport errors may better be controlled alongside the emissions, which differs from usual inversion practices. The average total concentration error is estimated at 29†ppb. The assessed error of total CH4 emissions is 22% and emission errors are heterogeneous at sector (23-49%) and country scales (16-124%), with largest errors occurring in the waste sector due to uncertainties in activity data and emission factors and in Finland due to uncertainties in natural wetland emissions. © 2021 The Author(s).