Tradeoff of CO2 and CH4 emissions from global peatlands under water-table drawdown

نویسندگان

چکیده

Water-table drawdown across peatlands increases carbon dioxide (CO2) and reduces methane (CH4) emissions. The net climatic effect remains unclear. Based on global observations from 130 sites, we found a positive (warming) climate of water-table drawdown. Using machine-learning-based upscaling approach, predict that peatland driven by drying human activities will increase CO2 emissions 1.13 (95% interval: 0.88–1.50) Gt yr?1 reduce CH4 0.26 (0.14–0.52) GtCO2-eq yr?1, resulting in greenhouse gas 0.86 (0.36–1.36) the end twenty-first century under RCP8.5 scenario. This drops to 0.73 (0.2–1.2) RCP2.6. Our results point an urgent need preserve pristine rehabilitate drained decelerate feedback among drawdown, increased warming. impact is unclear as decrease due drying. study shows decreasing depth peatlands, despite reducing

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ژورنال

عنوان ژورنال: Nature Climate Change

سال: 2021

ISSN: ['1758-6798', '1758-678X']

DOI: https://doi.org/10.1038/s41558-021-01059-w