Large emissions of CO2 and CH4 due to active-layer warming in Arctic tundra

Margaret S. Torn (), Rose Z. Abramoff, Lydia J. S. Vaughn, Oriana E. Chafe, J. Bryan Curtis and Biao Zhu
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Margaret S. Torn: Berkeley Lab
Rose Z. Abramoff: Berkeley Lab
Lydia J. S. Vaughn: Berkeley Lab
Oriana E. Chafe: Berkeley Lab
J. Bryan Curtis: Berkeley Lab
Biao Zhu: Berkeley Lab

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract Climate warming may accelerate decomposition of Arctic soil carbon, but few controlled experiments have manipulated the entire active layer. To determine surface-atmosphere fluxes of carbon dioxide and methane under anticipated end-of-century warming, here we used heating rods to warm (by 3.8 °C) to the depth of permafrost in polygonal tundra in Utqiaġvik (formerly Barrow), Alaska and measured fluxes over two growing seasons. We show that ecosystem respiration is ~30% higher in warmed plots than in control plots (0.99 μmol m−2 s−1 versus 0.67 μmol m−2 s−1, p

Date: 2025
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DOI: 10.1038/s41467-024-54990-9

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