Terrestrial carbon losses from mountaintop coal mining offset regional forest carbon sequestration in the 21st century

Studies that quantify the spatial and temporal variability of carbon sources and sinks provide process-level information for the prediction of future levels of atmospheric carbon dioxide as well as verification of current emission agreements. Assessments of carbon sources and sinks for North America that compare top-down atmospheric constraints with bottom-up inventories find particularly large carbon sinks in the southeastern US. However, this southeastern US sink may be impacted by extreme land-use disturbance events due to mountaintop coal mining (MCM). Here we apply ecosystem modeling and field experiment data to quantify the potential impact of future mountaintop coal mining on the carbon budget of the southern Appalachian forest region. For projections based on historical mining rates, grassland reclamation, and the continued regrowth of un-mined forests, we find that the southern Appalachian forests switch from a net carbon sink to a net carbon source by year 2025–33 with a 30%–35% loss in terrestrial carbon stocks relative to a scenario with no future mining by the year 2100. Alternatively, scenarios of forest sequestration due to the effect of CO _2 fertilization result in a 15%–24% loss in terrestrial carbon stocks by the year 2100 for mining scenarios relative to scenarios with no future mining. These results suggest that while power plant stack emissions are the dominant life-cycle stage in coal-fired electricity, accounting for mountaintop coal mining in bottom-up inventories may be a critical component of regional carbon budgets

Atmospheric carbon cycle · Carbon cycle · Carbon dioxide · Carbon sequestration · Carbon sink · Coal · Coal mining · Ecosystem · Geography · Sink (geography · Terrestrial ecosystem · Atmospheric and Environmental Gas Dynamics · Environmental Science · Fire effects on ecosystems · Peatlands and Wetlands Ecology · Ecology

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  Open Access•N Fabricant•The Radical Teacher•2015

  Incluir item

• Focus on extreme events and the carbon cycle

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  Incluir item

• Temperature sensitivity of soil carbon decomposition and feedbacks to climate change

  Open Access•Eric A Davidson, Ivan A Janssens•Nature•2006

  Incluir item

• Analysis of Factors Controlling Soil Organic Matter Levels in Great Plains Grasslands

  Open Access•W J Parton, D S Schimel et al.•Soil Science Society of America…•1987

  Incluir item

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  Pierre Friedlingstein, Peter M Cox et al.•Journal of Climate•2006

  Incluir item