Atmospherically Relevant Chemistry and Aerosol box model – ARCA box (version 1.2)

Abstract. We introduce the Atmospherically Relevant Chemistry and Aerosol box model ARCA (v.1.2.2). It is a zero-dimensional process with focus on atmospheric chemistry submicron aerosol processes, including cluster formation. A novel feature in its comprehensive graphical user interface, allowing for detailed configuration documentation of simulation settings, flexible input, output visualization. Additionally, interface contains tools module customization input data acquisition. These properties – customizability, ease implementation repeatability make an invaluable tool any scientist who needs view complex processes. based previous models (MALTE-BOX, ADiC ADCHEM), but code has been fully rewritten reviewed. The gas-phase incorporates Master Chemical Mechanism (MCMv3.3.1) Peroxy Radical Autoxidation (PRAM) can use compatible scheme. ARCA's couples ACDC (Atmospheric Cluster Dynamics Code) particle formation module, discrete size representation includes stationary fixed-grid moving average methods. calculates gas-particle partitioning low-volatility organic vapours number compounds included chemistry, as well Brownian coagulation particles. parametrizations vapour wall losses accepts user-supplied time- size-resolved input. written Fortran Python (user supplementary tools), be installed three major operating systems licensed under GPLv3.