Abstract
Abstract. This paper outlines the structure and usage of the GenChem system, which includes a chemical pre-processor GenChem.py) and a simple box model (boxChem). GenChem provides scripts and input files for converting chemical equations into differential form for use in atmospheric chemical transport models (CTMs) and/or the boxChem system. Although GenChem is primarily intended for users of the Meteorological Synthesizing Centre – West of the European Monitoring and Evaluation Programme (EMEP MSC-W) CTM and related systems, boxChem can be run as a stand-alone chemical solver, enabling for example easy testing of chemical mechanisms against each other. This paper presents an outline of the usage of the GenChem system, explaining input and output files, and presents some examples of usage. The code needed to run GenChem is released as open-source code under the GNU license.
Highlights
Atmospheric chemical transport models (CTMs) – which simulate the emissions, transport, chemistry and loss processes of pollutants – are essential tools for understanding air quality and for assisting governments in setting environmental goals and emissions targets
The EMEP CTM has been available as open-source code since 2008, and it has since been run by several institutes across Europe (e.g. Solberg et al, 2008; Jericevicet al., 2010; Karl et al, 2014; Omstedt et al, 2015; Vieno et al, 2016; Ots et al, 2018)
Primarily intended for users of the EMEP CTM and related systems, GenChem features a simple box-model testing system, which can run as a stand-alone chemical solver, enabling for example easy testing of chemical mechanisms against each other
Summary
Atmospheric chemical transport models (CTMs) – which simulate the emissions, transport, chemistry and loss processes of pollutants – are essential tools for understanding air quality and for assisting governments in setting environmental goals and emissions targets. Such CTMs are typically advanced three-dimensional models with perhaps a million grid cells. Stadtler et al, 2018; Simpson et al, 2020a, and references therein), is a three-dimensional Eulerian model whose main aim is to support governments in their efforts to design effective emissions control strategies. The EMEP CTM has been available as open-source code (http://www.emep.int, last access: 2 December 2020) since 2008, and it has since been run by several institutes across Europe (e.g. Solberg et al, 2008; Jericevicet al., 2010; Karl et al, 2014; Omstedt et al, 2015; Vieno et al, 2016; Ots et al, 2018)
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