Arctic wetlands are known emitters of the strong greenhouse gas methane (CH4). Well-drained soils on the other hand remove methane from the atmosphere. In the Arctic and boreal biomes, well drained upland soils with a high potential for atmospheric methane consumption cover more than 80% of the land area. Despite the large upland coverage and their potential importance for methane uptake, the underlying mechanisms, environmental controls and even the magnitude of Arctic soil methane uptake are poorly understood.
Automated chamber measurement set-up at Trail Valley Creek, Western Canadian Arctic. Credit: Carolina Voigt.
A recent study led by researchers from the University of Eastern Finland and the University of Montreal finds that Arctic The high-resolution measurements of methane uptake revealed previously unknown diel and seasonal dynamics in methane uptake: while methane uptake in early and peak summer was largest during the afternoons, coinciding with maximum soil temperature, methane uptake during late summer peaked during the night.
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