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

MARÍA DE BERNARDI; FRANCISCO DIEZ; GABRIEL GATICA

San Juan

Congreso; 2022 IEEE Biennial Congress of Argentina (ARGENCON); 2022

Institute of Electrical and Electronics Engineers

Know potential CH4 uptake it is important to evaluate mitigations strategies of greenhouse gasses emissions in Argentina. One principal factor affecting CH4 uptake is CH4 soil diffusion coefficient (Ds) which depends strongly on bulk density and soil water content. So knowing potential Ds, the potential CH4 uptake can be indirectly estimated. Ds was estimated in Buenos Aires Province (Argentina) using three models that depend on the CH4 diffusion coefficient in air (corrected by temperature) and air-filled pore space. Temperature data from satellite (MODIS) and georeference soil parameters (WoSIS) were used to estimate Ds.Principal results showed that spatial variation of Ds is related principally to soil texture, bulk density and organic carbon, which regulates soil water content in the soil porosity. Temperature slightly affects spatial and temporal variation of Ds. Spatially, sectors of Buenos Aires Province with low and high potential Ds were detected, showing sectors with high and low potential CH4 uptake.