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2018WCRPspon col July2018 01 1

K Kohnert: Regional scale assessment of methane fluxes from Arctic permafrost landscapes


This presentation was held at the DUE Permafrost 2014 workshop, 12th of Febuary 2014, Frascati, Italy


Katrin Kohnert[1] (), Andrei Serafimovich[1], Stefan Metzger[2,3], Jörg Hartmann[4], Torsten Sachs[1]

[1]GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
[2]National Ecological Observatory Network, 1685 38th Street, Boulder, CO 80301, USA
[3]University of Colorado, 1560 30th Street, Boulder, CO 80303, USA
[4]Alfred Wegener Institut – Helmholtz Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany

Quantification of methane emissions from the Arctic permafrost on a regional scale is urgently needed in order to understand and predict the possible impacts on global warming. Methane release depends on a variety of land surface and meteorological states, which vary in space. Consequently, also methane release exhibits spatial variability, which cannot be captured with chamber or tower-based measurements alone. To overcome this spatial limitation and to cover various surfaces, we use airborne eddy-covariance measurements. In the summers of 2012 and 2013 low-level flights have been performed in Alaskan and Canadian permafrost regions to determine methane fluxes. A combination of mechanistic and data-driven analysis tools allows us to relate the measured methane fluxes to spatial-temporally resolved surface properties and basic meteorological information. The aim is to develop a predictive model that produces maps of methane emissions, based on the spatial variation of the land surface and meteorological states.


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