Summary
This comparative analysis quantifies the climate mitigation potential of peatland restoration relative to soil carbon sequestration on agricultural mineral soils. Drained peatlands represent a substantial carbon and nitrogen stock; restoring them could avoid 1.91 Gt CO₂-eq annual emissions whilst requiring 3.4 times less additional nitrogen and substantially less land than achieving equivalent carbon sequestration on mineral soils. The findings suggest peatland rehabilitation merits stronger consideration in global climate change mitigation strategies.
UK applicability
The United Kingdom holds significant peatland resources, particularly in Scotland and upland regions, many of which are degraded or actively drained. These findings support the case for increased investment in UK peatland restoration as a cost-effective climate mitigation measure, with implications for moorland and wetland management policy.
Key measures
Cumulative carbon release (Gt C), nitrogen release (Gt N), greenhouse gas emissions (Gt CO₂-eq), nitrogen fertiliser requirements (% of global annual application), land area demand
Outcomes reported
The study compared the climate mitigation potential and environmental costs of peatland restoration versus soil carbon sequestration on agricultural land, quantifying cumulative carbon and nitrogen release from drained peatlands and nitrogen requirements for mineral soil carbon sequestration. It measured greenhouse gas emissions avoidable through peatland restoration and the relative nitrogen and land demands of each strategy.
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