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- W4310909757 abstract "Abstract. Wetlands and freshwater bodies (mainly lakes) are the largest natural source of greenhouse gas CH4 to the atmosphere. Great efforts have been made to quantify these source emissions and their uncertainties. Previous research suggests that there might be significant uncertainties coming from “double accounting” emissions from freshwater bodies and wetlands. Here we quantify the methane emissions from both land and freshwater bodies in the pan-Arctic with two process-based biogeochemistry models by minimizing the double accounting at the landscape scale. Two non-overlapping dynamic areal change datasets are used to drive the models. We estimate that the total methane emissions from pan-Arctic are 35.81 Tg CH4 yr−1 during 2000–2015, of which wetlands and freshwater bodies are 21.38 CH4 Tg yr−1 and 14.45 Tg CH4 yr−1, respectively. The emissions are significantly affected by humidity and vapor pressure, followed by temperature and landscape areal changes. Emissions from wetlands are more sensitive to landscape areal changes than from freshwater bodies while the latter emissions are more influenced by temperature than precipitation. Our sensitivity analysis indicates the pan-Arctic CH4 emissions from freshwater bodies were highly influenced by temperature, but less by lake sediment carbon content from permafrost thaw." @default.
- W4310909757 created "2022-12-20" @default.
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- W4310909757 date "2022-12-09" @default.
- W4310909757 modified "2023-09-29" @default.
- W4310909757 title "Methane emissions from Arctic landscapes during 2000–2015: An analysis with land and lake biogeochemistry models" @default.
- W4310909757 doi "https://doi.org/10.5194/bg-2022-220" @default.
- W4310909757 hasPublicationYear "2022" @default.
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