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| Blue Carbon | |
|---|---|
| Name | Blue Carbon |
| Caption | Coastal wetland vegetation and sediments sequestering carbon |
| Type | Environmental concept |
| Region | Global coastal and marine zones |
Blue Carbon is the carbon captured and stored in coastal and marine ecosystems, primarily in vegetated habitats and sediments. It links coastal ecology, climate mitigation, and socioeconomic policy through processes that store organic carbon over long timescales. Research and management integrate work from fields represented by institutions such as Intergovernmental Panel on Climate Change, United Nations Environment Programme, World Bank, National Aeronautics and Space Administration, and Smithsonian Institution.
Blue Carbon refers to carbon sequestered by coastal vegetated ecosystems and associated sediments along shorelines and continental shelves. The term emerged in scientific and policy discussions involving actors like International Union for Conservation of Nature, Convention on Biological Diversity, Ramsar Convention, United Nations Framework Convention on Climate Change, and Montreal Protocol stakeholders. It encompasses processes studied by researchers affiliated with Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, The Nature Conservancy, National Oceanic and Atmospheric Administration, and universities such as University of Cambridge, University of Oxford, Stanford University, University of California, Santa Cruz, and James Cook University.
Carbon enters coastal systems via photosynthesis performed by vegetation and phytoplankton studied at sites like Monterey Bay National Marine Sanctuary and Great Barrier Reef. Organic matter is transported, stabilized, and buried in sediments through biogeochemical pathways researched by groups at Max Planck Institute for Marine Microbiology, Lamont–Doherty Earth Observatory, Royal Netherlands Institute for Sea Research, and Helmholtz Centre for Ocean Research Kiel. Processes include plant carbon fixation, root deposition, microbial decomposition, and mineral association investigated in literature from journals associated with Nature, Science, Proceedings of the National Academy of Sciences, Geophysical Research Letters, and Global Change Biology.
Mangrove forests along coasts such as Amazon Delta, Mekong Delta, Ganges Delta, and Everglades National Park store large carbon pools within biomass and mud. Seagrass meadows in regions like Mediterranean Sea, Caribbean Sea, and South China Sea bury organic carbon in rhizomes and sediments. Salt marshes in places including Chesapeake Bay, Wadden Sea, Gulf of Mexico, and Yellow Sea accumulate peat and refractory organic matter. Key conservation and research organizations include Conservation International, BirdLife International, International Maritime Organization, and regional agencies such as Department of the Environment, Food and Rural Affairs and Australian Department of Agriculture, Water and the Environment.
Measurement techniques combine remote sensing from platforms like Landsat, Sentinel-2, ICESat-2, and Copernicus Programme with field sampling protocols developed by Intergovernmental Panel on Climate Change experts, United States Geological Survey, and academic consortia at Duke University, Yale University, University of Miami, and University of British Columbia. Carbon accounting frameworks are shaped by guidance from Green Climate Fund, World Resources Institute, ISO technical committees, and national reporting under Paris Agreement commitments. Methodologies employ sediment coring, radiocarbon dating linked to Radiocarbon Laboratory networks, biomass allometry derived from studies at institutions like Royal Botanic Gardens, Kew and Smithsonian Tropical Research Institute.
Blue carbon ecosystems face threats from land conversion, coastal development, aquaculture expansion, and extreme events recorded in history by Hurricane Katrina, Cyclone Pam, and Indian Ocean tsunami. Drivers include altered hydrology due to projects by entities such as World Bank-funded infrastructure and regional initiatives like Belt and Road Initiative. Losses release stored carbon producing feedbacks relevant to scenarios used by Intergovernmental Panel on Climate Change and modeled by groups at National Center for Atmospheric Research and Met Office Hadley Centre. Invasive species studies from International Commission for the Conservation of Atlantic Tunas and pollution analyses from United Nations Environment Programme illustrate compound stressors that accelerate carbon loss.
Restoration techniques include reforestation and managed realignment applied in projects run by The Nature Conservancy, Wetlands International, Blue Ventures, and government programs such as California Coastal Conservancy initiatives. Community-based approaches feature partners like World Wildlife Fund, Conservation International, indigenous organizations including representatives from United Nations Permanent Forum on Indigenous Issues, and local authorities in regions such as Philippines, Indonesia, Bangladesh, and Mozambique. Adaptive management uses monitoring tools from Global Ocean Observing System, standards from Society for Ecological Restoration, and finance mechanisms developed by Green Climate Fund and multilateral development banks.
Valuation of blue carbon informs national strategies under Paris Agreement nationally determined contributions and credits compatible with protocols considered by Verra, Gold Standard, American Carbon Registry, and compliance schemes like European Union Emissions Trading System. Economic analyses draw on models from World Bank, International Monetary Fund, Organisation for Economic Co-operation and Development, and research centers at Harvard University, London School of Economics, and Massachusetts Institute of Technology. Policy instruments involve legislatures and agencies including European Commission, United States Congress, Ministry of Environment (Brazil), and regional bodies like Association of Southeast Asian Nations coordinating conservation finance, blue bonds, and payment for ecosystem services.
Category:Climate change mitigation Category:Coastal ecosystems Category:Environmental policy