Guillaume Lamarche-Gagnon, Joost van Genuchten, Marie Bulínová, Laura Brosius, Arthur Fouillé

Field Report iC3-25-01 - Methane emissions from glacial-fed lakes, Kangerlussuaq, southwest Greenland

Introduction

Field report ic3-25-01 - methane emissions from glacial-fed lakes, kangerlussuaq, southwest greenland . Field report on methane emissions from glacial-fed lakes in Kangerlussuaq, Greenland. Explores carbon cycling, lake development, and ecological transitions in polar, deglaciated environments.

Abstract

In April 2025, our small land-based expedition investigated methane emissions from a series of proglacial lakes near the Greenland Ice Sheet sector of Kangerlussuaq (southwest Greenland). Activities consisted in the collection of shallow sediment cores, water and gas samples from 12 glacial-fed (GF) and non-glacial fed (NGF) lakes for downstream biogeochemical and microbial analyses. The work was part of a collaboration between the iC3 centre (UiT – The Arctic University of Norway), the Cryoeco group at Charles University in Prague, and the University of Alaska Fairbanks. Overall, samples and data collected aim to address uncertainties regarding methane emissions in (pro)glacial environments, inform on carbon cycling in subglacial and glacially influenced freshwater systems, as well as on lake development and ecological transition following deglaciation in polar regions

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