ChAP 1.0: a stationary tropospheric sulfur cycle for Earth system models of intermediate complexity

Abstract. A stationary, computationally efficient scheme ChAP 1.0 (Chemical and Aerosol Processes, version 1.0) for the sulfur cycle in troposphere is developed. This designed Earth system models of intermediate complexity (EMICs). The accounts dioxide emissions into atmosphere, its deposition to surface, oxidation sulfates, dry wet sulfates on surface. calculations with are forced by anthropogenic atmosphere 1850–2000 adopted from CMIP5 dataset ERA-Interim meteorology assuming that natural sources remain unchanged during this period. output compared changes tropospheric simulations data, IPCC TAR ensemble, ACCMIP phase II simulations. In addition, regions strong pollution, results other such as CAMS reanalysis, EMEP MSC-W, individual model Our reasonably reproduces characteristics known these information sources. our scheme, about half emitted deposited rest oxidised sulfates. turn, mostly removed deposition. lifetimes close 1 5 d, respectively. limitations acknowledged, prospects future development figured out. Despite simplicity, may be successfully used simulate pollution at coarse spatial scales timescales.