Braesicke, Peter

Kirner, Oliver

Ruhnke, Roland

Weimer, Michael

English

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Geophysical Research AbstractsVol. 20, EGU2018-19109, 2018EGU General Assembly 2018© Author(s) 2018. CC Attribution 4.0 license.Polar Stratospheric Clouds in ICON-ARTMichael Weimer (1), Oliver Kirner (1), Roland Ruhnke (2), and Peter Braesicke (2)(1) Steinbuch Centre for Computing, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany, (2) Institute ofMeteorology and Climate Research, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, GermanyWe present first results of the new scheme for Polar Stratospheric Clouds (PSCs) in the atmospheric chemistrymodel ICON-ART. ICON (ICOsahedral Nonhydrostatic modelling framework) is a joint development of the MaxPlanck Institute for Meteorology and the German Weather Service, where ICON is used operationally for numeri-cal weather forecasts. It gives the possibility of local grid refinement with two-way interaction: variables computedon the refined grid feed back to the global grid within the same simulation.The extension for Aerosols and Reactive Trace gases (ART) computes chemical reactions with the MECCA mech-anism and emissions with a module described by Weimer et al., GMD (2017). The Cloud-J module is used tocalculate photolysis rates. ICON-ART also includes a flexible tracer concept that allows the model to be applied tothe variety of experiments in weather and climate in an easy way (Schröter et al., GMDD, 2018).The PSC scheme in ICON-ART forms STS, NAT and ice PSCs according to thermodynamic equilibrium. Thegrowth of NAT particles is integrated over defined size bins. Size distributions of NAT PSCs can be varied easilyby taking advantage of the flexible tracer concept. We evaluate the PSC scheme and the chemistry on the PSC sur-faces with satellite data for specific Arctic and Antarctic winters and show first results of the two-way interactionin the chemistry part of ICON-ART.

Polar Stratospheric Clouds in ICON-ART

https://publikationen.bibliothek.kit.edu/1000085761/17133655

Polar Stratospheric Clouds in ICON-ART

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