TY  - EJOUR
AU  - Pozzer, Andrea
AU  - Reifenberg, Simon
AU  - Kumar, Vinod
AU  - Franco, Bruno
AU  - Taraborrelli, Domenico
AU  - Gromov, Sergy
AU  - Ehrhart, Sebastian
AU  - Jöckel, Patrick
AU  - Sander, Rolf
AU  - Fall, Veronica
AU  - Rosanka, Simon
AU  - Karydis, Vlassis
AU  - Akritidis, Dimitris
AU  - Emmerichs, Tamara
AU  - Crippa, Monica
AU  - Guizzardi, Diego
AU  - Kaiser, Johannes W.
AU  - Clarisse, Lieven
AU  - Kiendler-Scharr, Astrid
AU  - Tost, Holger
AU  - Tsimpidi, Alexandra
TI  - Simulation of organics in the atmosphere: evaluation of EMACv2.54 with the Mainz Organic Mechanism (MOM) coupled to the ORACLE (v1.0) submodel
JO  - Geoscientific model development discussions
SN  - 1991-9611
CY  - Katlenburg-Lindau
PB  - Copernicus
M1  - FZJ-2021-04869
PY  - 2021
AB  - Abstract. An updated and expanded representation of organics in the chemistry general circulation model EMAC (ECHAM5/MESSy for Atmospheric Chemistry) has been evaluated. First, the comprehensive Mainz Organic Mechanism (MOM) in the submodel MECCA (Module Efficiently Calculating the Chemistry of the Atmosphere) was activated with explicit degradation of organic species up to five carbon atoms and a simplified mechanism for larger molecules. Second, the ORACLE submodel (version 1.0) considers now condensation on aerosols for all organics in the mechanism. Parameterizations for aerosol yields are used only for the lumped species that are not included in the explicit mechanism. The simultaneous usage of MOM and ORACLE allows an efficient estimation, not only of the chemical degradation of the simulated volatile organic compounds, but also of the contribution of organics to the growth and fate of (organic) aerosol, with a complexity of the mechanism largely increased compared to EMAC simulations with more simplified chemistry. The model evaluation presented here reveals that the OH concentration is well reproduced globally, while significant biases for observed oxygenated organics are present. We also investigate the general properties of the aerosols and their composition, showing that the more sophisticated and process-oriented secondary aerosol formation does not degrade the good agreement of previous model configurations with observations at the surface, allowing further research in the field of gas-aerosol interactions.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.5194/gmd-2021-295
UR  - https://juser.fz-juelich.de/record/903145
ER  -