TY - JOUR AU - Sander, Rolf AU - Baumgaertner, Andreas AU - Cabrera, David AU - Frank, Franziska AU - Grooß, Jens-Uwe AU - Gromov, Sergey AU - Harder, Hartwig AU - Huijnen, Vincent AU - Jöckel, Patrick AU - Karydis, Vlassis A. AU - Niemeyer, Kyle E. AU - Pozzer, Andrea AU - Riede, Hella AU - Schultz, Martin G. AU - Taraborrelli, Domenico AU - Tauer, Sebastian TI - The atmospheric chemistry box model CAABA/MECCA-4.0gmdd JO - Geoscientific model development discussions VL - gmd-2018-201 SN - 1991-962X CY - Katlenburg-Lindau PB - Copernicus M1 - FZJ-2018-06530 SP - 1 - 31 PY - 2018 AB - We present version 4.0gmdd of the atmospheric chemistry box model CAABA/MECCA which now includes a number of new features: (i) skeletal mechanism reduction, (ii) the MOM chemical mechanism for volatile organic compounds, (iii) an option to include reactions from the Master Chemical Mechanism (MCM) and other chemical mechanisms, (iv) updated isotope tagging, and (v) improved and new photolysis modules (JVAL, RADJIMT, DISSOC). Further, when MECCA is connected to a global model, the new feature of coexisting multiple chemistry mechanisms (PolyMECCA/CHEMGLUE) can be used. Additional changes have been implemented to make the code more user-friendly and to facilitate the analysis of the model results. Like earlier versions, CAABA/MECCA-4.0gmdd is a community model published under the GNU General Public License. LB - PUB:(DE-HGF)16 DO - DOI:10.5194/gmd-2018-201 UR - https://juser.fz-juelich.de/record/857539 ER -