B038-0009
Methane Fluxes from Zambian Tropical Wetlands

Wednesday, 9 December 2020
Poster
Jacob Shaw1, Grant Allen1, Patrick Barker1, Prudence Bateson2, Stephane Bauguitte3, Rebecca Fisher4, Martin William Gallagher2, Garry Hayman5, James D Lee6, David Lowry4, Dominika Pasternak7, Joseph Robert Pitt8, Adam Vaughan6 and Euan G Nisbet4, (1)University of Manchester, Manchester, M13, United Kingdom, (2)University of Manchester, Manchester, United Kingdom, (3)Facility for Airborne Atmospheric Measurements (FAAM), Cranfield, United Kingdom, (4)Royal Holloway, University of London, Egham, United Kingdom, (5)Centre for Ecology and Hydrology, Wallingford, United Kingdom, (6)University of York, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom, (7)University of York, York, United Kingdom, (8)Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY, United States
Abstract:
Airborne measurements of methane (CH4) were recorded over two major wetland areas in Zambia in February 2019 during the MOYA (Methane Observations and Yearly Assessments) ZWAMPS field campaign. Enhancements of up to 500 ppb CH4 were measured over the Lukanga swamp (14°29’ S, 27°47’ E) and the Bangweulu wetland (11°36’ S, 30°05’ E). Methods based on mass balancing and eddy covariance were used to independently quantify a CH4 flux from each of these areas with preliminary results suggesting fluxes in the range of 10-30 mg CH4 m-2 hr-1, when normalised to wetland area extent. A comparison of the flux quantification methods and their applicability to different sampling strategies will be presented. Calculated fluxes will be compared with those estimated by land surface models, such as JULES (Joint UK Land Environment Simulator), and with measurements from tropical wetlands in other regions.
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