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Global variation in the cost of increasing ecosystem carbon

Global variation in the cost of increasing ecosystem carbon

Slowing the reduction, or increasing the accumulation, of organic carbon stored in biomass and soils has been suggested as a potentially rapid and cost-effective method to reduce the rate of atmospheric carbon increase1. The costs of mitigating climate change by increasing ecosystem carbon relative to the baseline or business-as-usual scenario has been quantified in numerous studies, but results have been contradictory, as both methodological issues and substance differences cause variability2. Here we show, based on 77 standardized face-toface interviews of local experts with the best possible knowledge of local land-use economics and sociopolitical context in ten landscapes around the globe, that the estimated cost of increasing ecosystem carbon varied vastly and was perceived to be 16-27 times cheaper in two Indonesian landscapes dominated by peatlands compared with the average of the eight other landscapes. Hence, if reducing emissions from deforestation and forest degradation (REDD+) and other land-use mitigation efforts are to be distributed evenly across forested countries, for example, for the sake of international equity, their overall effectiveness would be dramatically lower than for a cost-minimizing distribution.

Authors: Larjavaara, M.; Kanninen, M.; Gordillo-Ruesta, H.A.; Koskinen, J.; Kukkonen, M.; Käyhkö, N.; Larson, A.M.; Wunder, S.

Topic: biomass, carbon, soil, climate change, mitigation, land use

Publication Year: 2018

ISSN: 1758-6798

Source: Nature Climate Change 8(1): 38-42

DOI: 10.1038/s41558-017-0015-7

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