Mapping the potential soil CH4 diffusion coefficient for Buenos Aires (Argentina)

GABRIEL GATICA; JORGE FRANCISCO DIEZ; MARÍA DE BERNARDI

San Juan

Congreso; VI Congreso Bienal ARGENCON; 2022

Sección Argentina del IEEE, Instituto de Energía Eléctrica de la Universidad Nacional de San Juan y la Universidad de Palermo

Know potential CH4 uptake it is important toevaluate mitigations strategies. One of the principal factorsthat affects CH4 uptake is CH4 soil diffusion coefficient (Ds)that depends strongly on bulk density and soil water content.So knowing potential Ds, it can be indirectly estimated thepotential CH4 uptake. Ds was estimated in Buenos AiresProvince (Argentina) using three models that depend on CH4diffusion coefficient in air (corrected by temperature) and airfilled pore space. To estimate Ds, temperature data fromsatellite (MODIS) and georeference soil parameters (WoSIS)was used.Principal results showed that spatial variation of Ds isrelated principally with soil texture, bulk density and organiccarbon, that regulates soil water content into the soil porosity.Temperature affects slightly spatial and temporal variation ofDs. Spatially, sectors of Buenos Aires Province with low andhigh potential Ds were detected, and these would show sectorswith high and low potential CH4 uptake.