Solving Methane fluxes at northern latitudes using atmospheric and soil EO data - MethEO
Kimmo Rautiainen, Finnish Meteorological Institute, kimmo.rautiainen@fmi.fi
Tuula Aalto, Finnish Meteorological Institute, tuula.aalto@fmi.fi
Hannakaisa Lindqvist, Finnish Meteorological Institute, hannakaisa.lindqvist@fmi.fi (Presenter)
Aki Tsuruta, Finnish Meteorological Institute, aki.tsuruta@fmi.fi
Maria Tenkanen, Finnish Meteorological Institute, maria.tenkanen@fmi.fi
Ella Kivimäki, Finnish Meteorological Institute, ella.kivimaki@fmi.fi
Tomi Karppinen, Finnish Meteorological Institute, tomi.karppinen@fmi.fi
Anu-Maija Sundström, Finnish Meteorological Institute, anu-maija.sundstrom@fmi.fi
Rigel Kivi, Finnish Meteorological Institute, rigel.kivi@fmi.fi
Johanna Tamminen, Finnish Meteorological Institute, johanna.tamminen@fmi.fi
Christian Retscher, European Space Agency, ESRIN, christian.retscher@esa.int
Finnish Meteorological Institute (FMI) started in 2018 a study called “Solving METHane fluxes at northern latitudes using atmospheric and soil EO data (MethEO)”. The key element in MethEO is to combine methods for monitoring of methane emissions in the Northern Hemisphere by applying atmospheric and cryospheric data from Earth Observing (EO) satellites (TROPOMI, GOSAT, GOSAT-2, SMOS), ground-based retrievals, in-situ measurements, and global atmospheric methane inversion model estimates. The MethEO study has contributed to an improved understanding on the northern latitude methane emissions, particularly in quantifying the emissions during the soil freezing period and improving the consideration of the freezing period in inverse modelling. MethEO project contributes also directly to the NASA/ESA joint initiative on Arctic Methane and Permafrost Challenge.
In MethEO we study the connections of Northern High Latitude methane (CH4) sources to environmental drivers such as seasonal soil freezing and thawing (F/T), snow depth, precipitation and inundated area (wetland extent). The focus covers the autumn emissions and recently increasingly also winter and spring season methane emissions. New ground-based, atmospheric and satellite data are used for covering the winter gap in satellite instruments using SWIR. The latest XCH4 satellite products are evaluated, and selected products are assimilated in CarbonTracker Europe (CTE-CH4) for estimating both natural and anthropogenic methane emissions. One of the recently added objectives is to study the possibilities to detect hot spots, point sources and rapid changes in emissions using modelling and satellite data analysis methods. Finally, in relation to the use of satellite data, we will review and evaluate the methods introduced and results obtained considering the magnitude, seasonality, trends, origin and distribution of emissions at Northern high latitudes.
Poster: Poster_Rautiainen__145_25.pdf
Presentation Type: Poster
Session: 3.5a Flux estimates and atmospheric inversions from space-based GHG measurements
Session Date: Wednesday (6/16) 12:00 PM