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Coastal wetland management as a contribution to the US National Greenhouse Gas Inventory


The IPCC 2013 Wetlands Supplement provided new guidance for countries on inclusion of wetlands in their National GHG Inventories. The United States has responded by including managed coastal wetlands for the first time in its 2017 GHG Inventory report along with an updated time series in the most recent 2018 submission and plans to update the time series on an annual basis as part of its yearly submission to the United Nations Framework Convention on Climate Change (UNFCCC). The United States followed IPCC Good Practice Guidance when reporting sources and sinks associated with managed coastal wetlands. Here we show that intact vegetated coastal wetlands are a net sink for GHGs. Despite robust regulation that has protected substantial stocks of carbon, the United States continues to lose coastal wetlands to development and the largest loss of wetlands to open water occurs around the Mississippi Delta due mostly to upstream changes in hydrology and sediment delivery, and oil and gas extraction. These processes create GHG emissions. By applying comprehensive Inventory reporting, scientists in the United States have identified opportunities for reducing GHG emissions through restoration of coastal wetlands that also provide many important societal co-benefits.

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Data availability

Some of the data that informed this analysis are included in the US Greenhouse Gas Inventory (see previously published studies5,6). Other data can be made available upon request to the corresponding author (S.C.).


  1. 1.

    IPCC Good Practice Guidance for Land Use, Land-Use Change and Forestry (eds Pennman, J. et al.) (IGES, 2003).

  2. 2.

    Houghton, J. T. et al. (eds) Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories (IPCC, 1997).

  3. 3.

    The Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories (IPCC, 2000).

  4. 4.

    2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands (eds Hiraishi, T. et al.) (IPCC, 2014).

  5. 5.

    Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2015 (US EPA, 2017);

  6. 6.

    Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2016 (US EPA, 2018);

  7. 7.

    Poffenbarger, H. J., Needelman, B. A. & Megonigal, J. P. Salinity influence on methane emissions from tidal marshes. Wetlands 31, 831–842 (2011).

    Article  Google Scholar 

  8. 8.

    Dahl, T. E. & Stedman, S. M. Status and Trends of Wetlands in the Coastal Watersheds of the Conterminous United States 2004 to 2009 (US Department of the Interior, Fish and Wildlife Service and National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 2013).

  9. 9.

    Kennish, M. J. Coastal salt marsh systems in the U.S.: a review of anthropogenic impacts. J. Coast. Res. 17, 731–748 (2001).

    Google Scholar 

  10. 10.

    Olea, R. A. & Coleman, J. L.Jr. A synoptic examination of causes of land loss in southern Louisiana as related to the exploitation of subsurface geologic resources. J. Coast. Res. 30, 1025–1044 (2014).

    Article  Google Scholar 

  11. 11.

    Twilley, R. R. et al. Co-evolution of wetland landscapes, flooding, and human settlement in the Mississippi River Delta Plain. Sustain. Sci. 11, 711–731 (2016).

    Article  Google Scholar 

  12. 12.

    Syvitski, J. P. M. et al. Sinking deltas due to human activities. Nat. Geosci. 2, 681–686 (2009).

    CAS  Article  Google Scholar 

  13. 13.

    Blair, N. E. & Aller, R. C. The fate of terrestrial organic carbon in the marine environment. Annu. Rev. Mar. Sci. 4, 401–423 (2012).

    Article  Google Scholar 

  14. 14.

    GFOI Integrating Remote-Sensing and Ground-Based Observations for Estimation of Emissions and Removals of Greenhouse Gases in Forests: Methods and Guidance from the Global Forest Observations Initiative (Group on Earth Observations, 2013).

  15. 15.

    Schuerch, M. et al. Future response of global coastal wetlands to sea-level rise. Nature 561, 231–234 (2018).

    CAS  Article  Google Scholar 

  16. 16.

    Visser, J. M., Duke-Sylvester, S. M., Carter, J. & Broussard, W. P. A computer model to forecast wetland vegetation changes resulting from restoration and protection in coastal Louisiana. J. Coast. Res. 67, 51–59 (2013).

    Article  Google Scholar 

  17. 17.

    Kroeger, K. D., Crooks, S., Moseman-Valtierra, S. & Tang, J. W. Restoring tides to reduce methane emissions in impounded wetlands: a new and potent blue carbon climate change intervention. Sci. Rep. 7, 11914 (2017).

  18. 18.

    Couvillion, B. R., Steyer, G. D., Wang, H. Q., Beck, H. J. & Rybczyk, J. M. Forecasting the effects of coastal protection and restoration projects on wetland morphology in coastal Louisiana under multiple environmental uncertainty scenarios. J. Coast. Res. 67, 29–50 (2013).

    Article  Google Scholar 

  19. 19.

    DeLaune, R. D. & White, J. R. Will coastal wetlands continue to sequester carbon in response to an increase in global sea level?: A case study of the rapidly subsiding Mississippi River deltaic plain. Climatic Change 110, 297–314 (2012).

    Article  Google Scholar 

  20. 20.

    IPCC Climate Change 2007: The Physical Science Basis (eds Solomon, S. et al.) (Cambridge Univ. Press, 2007).

  21. 21.

    Lowther, A. & Liddel, M. (eds) Fisheries of the United States 2015 (National Marine Fisheries Service, 2015);

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We are grateful to the Coastal Blue Carbon Working Group, Restore America’s Estuaries, the NOAA, the USGCRP and the EPA for support and technical input as part of this process. This is contribution number 9 of the Sea Level Solutions Center at the Institute of Water and Environment, Florida International University.

Competing interests

The authors declare no competing interests.

Author information




S.C. and T.G.T. led the process for including coastal wetlands in the US Greenhouse Gas Inventory with technical input from T.W. and with help from A.E.S.-G., N.H., B.B. and L.S.-B. S.C., A.E.S.-G. and T.G.T. wrote this manuscript with help from T.W.

Corresponding author

Correspondence to Stephen Crooks.

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Supplementary Information

Supplementary Discussion, Supplementary Tables 1–2, Supplementary References

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Crooks, S., Sutton-Grier, A.E., Troxler, T.G. et al. Coastal wetland management as a contribution to the US National Greenhouse Gas Inventory. Nature Clim Change 8, 1109–1112 (2018).

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