Quantifying greenhouse gas sources and sinks in managed wetland systems
| Authors: | Stephen M. Ogle, Patrick Hunt, Carl C. Trettin |
| Year: | 2024 |
| Type: | Technical Bulletin |
| Station: | Southern Research Station |
| Source: | In: Hanson, Wes L.; Itle, Cortney; Edquist, Kara, eds. Quantifying greenhouse gas fluxes in agriculture and forestry: Methods for entity‐scale inventory. Technical Bulletin Number 1939, 2nd edition. Washington, DC: U.S. Department of Agriculture, Office of the Chief Economist. 6-1 – 6-23. Chapter 6. |
Abstract
This chapter provides methodologies and guidance for reporting greenhouse gas (GHG) emissions and sinks at the entity scale for managed wetland systems. More specifically, it focuses on methods for managed palustrine wetlands.
Section 6.1 provides an overview of wetland systems and resulting GHG emissions, system boundaries and temporal scale, and a summary of the selected methods/models and its sources of data. Section 6.2 provides the estimation methods for biomass carbon in wetlands and soil carbon, N2O, and CH4 emissions and sinks. A single method is provided for each source presented in this chapter (i.e., biomass carbon in forested, shrub, and grass wetlands; soil carbon and CH4 in wetlands; and direct N2O emissions in wetlands). Appendix 6-A presents the various management practices that influence GHG emissions in wetland systems and land-use change to wetlands. Appendix 6-B includes a discussion of research gaps in wetland management.
This chapter and its methods have been minimally updated since the 2014 report. Therefore, this chapter does not take into consideration any updated literature or methodologies, notably those available in the 2013 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories: Wetlands (IPCC 2013). Revisions will be made to this chapter in future report updates. Additional background information on the impact of cropland and grazing land management is available in the 2014 report