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Frequency-domain electromagnetic induction for upscaling greenhouse gas fluxes in two hemiboreal drained peatland forests

Abstract : The greenhouse-gas (GHG) balance of CH 4 and N 2 O emissions and CO 2 respiration in peatlands plays a key role in climate change. A GHG balance is mostly calculated from point measurements. In this study we propose and test a geophysical method of low frequency domain electromagnetic method (FDEM) as a proxy for forest-floor CO 2 respiration and CH 4 emissions in two 50 × 100 m drained peatlands in Estonia: a Downy birch and a Scots pine stand from April to September 2015. The FDEM measurement campaign in September 2015 yielded a detailed map of topsoil electrical conductivity. We explain the predictive power of FDEM on GHG emissions through relationships with dry bulk density of soil. Although we over-or underestimated some fluxes owing to soil het-erogeneity, we composed reasonably credible GHG emission maps. The initial results seem promising and we recommend further application of FDEM methods.
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https://hal.inrae.fr/hal-02910131
Déposant : Rémi Clement <>
Soumis le : vendredi 31 juillet 2020 - 18:36:34
Dernière modification le : mardi 8 septembre 2020 - 12:26:02

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Rémi Clément, Jaan Pärn, Martin Maddison, Hocine Henine, Cédric Chaumont, et al.. Frequency-domain electromagnetic induction for upscaling greenhouse gas fluxes in two hemiboreal drained peatland forests. Journal of Applied Geophysics, Elsevier, 2020, 173, pp.1-10. ⟨10.1016/j.jappgeo.2020.103944⟩. ⟨hal-02910131⟩

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