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1 lip 2024 · We use a reduced complexity carbon cycle model and a permafrost feedback module to explore the possibility that accelerating reductions in methane emissions could help avoid long-term warming by limiting permafrost melt.
20 sie 2018 · Lakes that form from this thawing permafrost can speed up the release of methane — a potent greenhouse gas — from Arctic soil. As the climate warms, carbon frozen in the soil makes its way into the atmosphere.
1 maj 2023 · Higher atmospheric methane concentrations and lower δ 13 CO 2 in permafrost regions suggest accelerated methane emission. The anthropogenic carbon dioxide emission accelerated thawing of permafrost and methane emission. The positive feedback may break the glacial-interglacial cycle.
2 gru 2021 · Accelerating permafrost thaw threatens significant increases in pan-Arctic CH 4 emissions, amplifying the permafrost carbon feedback. We used airborne imaging spectroscopy with meter-scale spatial resolution and broad coverage to identify a previously undiscovered CH 4 emission hotspot adjacent to a thermokarst lake in interior Alaska.
3 cze 2024 · Rising Arctic temperatures pose a threat to the large carbon stores trapped in Arctic permafrost. To assess methane emissions in high-Arctic regions, we analyzed atmospheric data from Alaska and Siberia using two methods: (a) a wind sector approach to calculate emission changes based on concentration enhancements using wind direction, and (b ...
15 sie 2018 · Permafrost carbon feedback (PCF) modeling has focused on gradual thaw of near-surface permafrost leading to enhanced carbon dioxide and methane emissions that accelerate global climate warming....
22 lis 2019 · Warming conditions promote microbial conversion of permafrost carbon into the greenhouse gases carbon dioxide and methane that are released to the atmosphere in an accelerating feedback to climate warming.
