The FRAME model calculates the deposition of sulphur and nitrogen at both standard (5 km) and high (1 km) resolution across the UK. The results are used to calculate the exceedance of critical loads for future emissions scenarios. The model is also used to calculate the exceedance of the critical level for ammonia concentrations and to generate source-receptor matrices of secondary inorganic aerosol concentrations and deposition for use in the UK Integrated Assessment Model. Other uses include the deposition and concentration of base cations and heavy metals.
