Technical note: The new comprehensive atmospheric chemistry module MECCA

[摘要] In this technical note we present the multi-purpose atmosphericchemistry model MECCA. Owing to its versatility and modular structure,it can be used for tropospheric as well as stratospheric chemistrycalculations. Extending the code to other domains (e.g. mesosphericor oceanic chemistry) is easily possible. MECCA contains acomprehensive atmospheric reaction mechanism that currently includes:1) the basic O₃, CH₄, HO_x, and NO_xchemistry, 2) non-methane hydrocarbon (NMHC) chemistry, 3) halogen(Cl, Br, I) chemistry, and 4) sulfur chemistry.Not only gas-phase chemistry but also aqueous-phase and heterogeneousreactions are considered. Arbitrary subsets of the comprehensivemechanism can be selected according to the research objectives. Theprogram code resulting from the chemical mechanism can easily be usedin any model, from a simple box model to a comprehensive globalgeneral circulation model.

[学科分类] 大气科学