Estimating methane emissions in the Arctic nations using surface observations from 2008 to 2019
Sophie Wittig,Antoine Berchet,Isabelle Pison,Marielle Saunois,Joël Thanwerdas,Adrien Martinez,Jean-Daniel Paris,Toshinobu Machida,Motoki Sasakawa,Douglas E. J. Worthy,Xin Lan,Rona L. Thompson,Espen Sollum,and Mikhail Arshinov
Laboratoire des Sciences du Climat et de l'Environnement, CEA–CNRS–UVSQ, Gif-sur-Yvette, France
Here, an inverse modelling approach is applied to estimate CH4 sources and sinks in the Arctic from 2008 to 2019. We study the magnitude, seasonal patterns and trends from different sources during recent years. We also assess how the current observation network helps to constrain fluxes. We find that constraints are only significant for North America and, to a lesser extent, West Siberia, where the observation network is relatively dense. We find no clear trend over the period of inversion.
Here, an inverse modelling approach is applied to estimate CH4 sources and sinks in the Arctic...