1) The document discusses using the DayCent ecosystem model to estimate greenhouse gas emissions from Irish grasslands and soils. 2) Parameterization of DayCent was done based on a long-term dataset from Northern Ireland to simulate biomass production, soil carbon, water content, and greenhouse gas fluxes. 3) While DayCent captures key processes in mineral soils, it does not adequately simulate organic soils like peatlands. Further improvements would be needed to apply it reliably across all Irish soils.