Mountain-wave-induced polar stratospheric clouds and their representation in the global chemistry model ICON-ART ...

• Main Authors: Weimer, Michael, Buchmüller, Jennifer, Hoffmann, Lars, Kirner, Ole, Luo, Beiping, Ruhnke, Roland, Steiner, Michael, Tritscher, Ines, Braesicke, Peter
• Format: Article in Journal/Newspaper
• Language: English
• Published: ETH Zurich 2021
• Subjects: Antarc*; Antarctic; Antarctic Peninsula; polar night
• Online Access: https://dx.doi.org/10.3929/ethz-b-000492839; http://hdl.handle.net/20.500.11850/492839

Polar stratospheric clouds (PSCs) are a driver for ozone depletion in the lower polar stratosphere. They provide surface for heterogeneous reactions activating chlorine and bromine reservoir species during the polar night. The large-scale effects of PSCs are represented by means of parameterisations in current global chemistry–climate models, but one process is still a challenge: the representation of PSCs formed locally in conjunction with unresolved mountain waves. In this study, we investigate direct simulations of PSCs formed by mountain waves with the ICOsahedral Nonhydrostatic modelling framework (ICON) with its extension for Aerosols and Reactive Trace gases (ART) including local grid refinements (nesting) with two-way interaction. Here, the nesting is set up around the Antarctic Peninsula, which is a well-known hot spot for the generation of mountain waves in the Southern Hemisphere. We compare our model results with satellite measurements of PSCs from the Cloud-Aerosol Lidar with Orthogonal ... : Atmospheric Chemistry and Physics, 21 (12) ...