Restoring tides to reduce methane emissions in impounded wetlands: A new and potent Blue Carbon climate change intervention

摘要: Coastal wetlands are sites of rapid carbon (C) sequestration and contain large soil C stocks. Thus, there is increasing interest in those ecosystems as for anthropogenic greenhouse gas emission offset projects (sometimes referred to “Blue Carbon”), through preservation existing stocks or creation new increase future sequestration. Here we show that the globally-widespread occurrence diked, impounded, drained tidally-restricted salt marshes, substantial methane (CH4) CO2 reductions can be achieved restoration disconnected saline tidal flows. Modeled climatic forcing indicates reduce emissions has a much greater impact per unit area than wetland conservation enhance Given GHG tidally-restricted, degraded caused by human activity, they emissions, reducing them will have an effect on climate equivalent reduced equal quantity fossil fuel GHG. landuse-based change intervention, CH4 entirely distinct concept from biological storage forest biomass soil, not suffer non-permanence risk stored returned atmosphere.