Book of Abstracts DOI: 10.5676/DWD pub/nwv/iccarus 2021 Max-Planck-Institut für Meteorologie DOI: 10.5676/DWD pub/nwv/iccarus 2021 The CC license “BY-NC-ND” allows others only to download the publication and share it with others as long as they credit the publication, but they can’t change it in any way or use it commercially. Publisher Editors Deutscher Wetterdienst Daniel Rieger, DWD, Business Area “Research and Development” [email protected] Frankfurter Straße 135 Christian Steger, DWD, 63067 Offenbach [email protected] www.dwd.de Contents 1 Invited & Solicited Talks7 Developing the ICON-A model for direct QBO simulations on GPUs...........7 ICON-Land/JSBACH: A Framework for the Land Component in the ICON Modeling System.................................7 Advances in forecast quality achieved with ICON-D2, and upcoming further development steps................................8 Once upon a Time at DWD - The COSMO-Model.....................8 HPC Infrastructure of ICON for high-res simulations....................9 Waves and drag processes in atmospheric models......................9 Status and applications of the modelling system ICON-ART................9 2 Special Session: ICON-Seamless 11 Roadmap to ICON-Seamless................................. 11 The ICON-System at MPI-M and its application for Climate Simula- tions........................................... 11 Sapphire - towards the next generation of Earth System models.............. 11 3 Climate Model Applications 13 Tuning ICON-NWP for Climate applications........................ 13 Impact of Urban Canopy Parameters on a Megacity's Modelled Thermal Environment. 13 COSMO-CLM Performance and Projection of Daily and Hourly Tem- peratures Reaching 50◦C or Higher in Southern Iraq................. 14 COSMO-CLM Russian Arctic hindcast 1980 { 2016: modelling work- flow, evaluation techniques and preliminary assessment................ 14 Exploring hail and lightning mechanisms over the Alpine-Adriatic region using HAILCAST and LPI in a convection-resolving model............. 15 Development and Quality Evaluation of an Operational Ensemble-based Regional Reanalysis System............................... 16 Using regional reanalysis and satellite data to estimate renewable energy production for applications in the German transport infrastructure......... 16 Current and future large-scale dynamical influences on Lake Victoria's thunderstorms. 17 Austrian Test Case: CCLM results in different warming scenarios............. 17 Ten years of reanalysis activities at DWD: review and outlook............... 18 Evaluation of Convection-permitting simulations for Germany using gridded observations on high temporal resolution................... 18 Current convection-permitting COSMO-CLM simulations for Germany.......... 19 4 Clouds, Chemistry, Aerosol and Radiation 20 Application of Liquid and Ice Clouds Optical Properties Parametriza- tions in Numerical Weather Prediction Models.................... 20 Increasing Resolution and Resolving Convection Improve the Simulation of Cloud-Radiative Effects Over the North Atlantic.................. 20 Modeling methane from the North Sea region with ICON-ART.............. 21 New radiation scheme ecRad and impact of uncertainties in radiation and clouds for ICON................................... 21 PerduS and PermaStrom: Daily Mineral dust forecasts using ICON-ART........ 22 Raikoke eruption 2019: Improving ash and SO2 forecasts by coupling ICON-ART to a plume rise model........................... 23 The effect of spring 2020 lockdown in Moscow on the cloud characteris- tics according to COSMO-Ru simulations and measurements............ 24 How did they get there? The Importance of the Particle History for the Ice Habit....................................... 24 An evaluation of kilometre scale ICON simulations of mixed-phase stratocumulus over the Southern Ocean during CAPRICORN............ 25 Prognostic Ozone for ICON: Enabling UV Forecasts.................... 26 Efficient generation of synthetic near-infrared satellite images............... 26 Clouds and precipitation in ICON-LAM from radar and SEVIRI observations...... 27 Improved Ice Aggregation Formulation in the Seifert-Beheng Two- Moment Microphysics Scheme.............................. 28 Investigation of aircraft icing sensitivities using a parameterization respecting droplet spectra................................ 28 Options and extensions for the stochastic shallow convection scheme in ICON...... 29 Quantification of the effects of aerosol deposition on snow by ensemble simulations... 29 Using Microphysical Piggybacking in ICON to explain the sensitivity of simulated convection to the choice of microphysics scheme............ 30 5 Data Assimilation 31 Evaluation of ICON's model cloud fields using simulated and observed visible satellite images.................................. 31 Assimilation of remote sensing profiler observations at MeteoSwiss............ 31 EnVAR for ICON-LAM: observations and quality control................. 32 Adaptive non-linear bias correction for visible reflectance data............... 32 Assimilating 3D radar information at convective scales at DWD.............. 33 Improving radiation forecasts by assimilating visible satellite images in ICON-D2......................................... 33 6 Dynamics and Numerics 35 A locally smoothed vertical coordinate to improve fog and low stratus forecasts..... 35 COSMO-EULAG dynamical core with long timestep capability.............. 35 ICON model on GPU..................................... 35 Towards a transient 3D gravity wave parameterization in ICON.............. 36 7 Model Infrastructure and Data Processing 37 Zarr formatted Climate Data in DKRZ's Swift Cloud Object Storage........... 37 The ICON single column mode................................ 37 4 8 NWP Model Applications and Case Studies 38 Case study of an Arctic atmospheric river with the ICON model............. 38 Impact of different external parameters on Turin UHI with COSMO at 1km....... 38 Towards understanding the role of uncertainty in microphysical pro- cesses for warm conveyor belt ascent using microphysical heating rates along online trajectories in ICON......................... 39 Lagrangian analysis of an Alpine Foehn event........................ 39 High-resolution Simulations of Atmospheric CO2 with ICON/MESSy.......... 40 A preliminary evaluation of the near-surface evolution of Foehn events in COSMO-1....................................... 41 How do mesoscale weather systems interact with off-shore wind farms: A study for the Kattegat (Denmark, Sweden) with the mesoscale model COSMO-CLM and satellite scatterometer data................ 41 Pollen forecasts using ICON-ART in a limited area mode................. 42 Representation of the urban environment in ICON-LAM.................. 43 SINFONY - the combination of Nowcasting and Numerical Weather Prediction on the convective scale at DWD...................... 43 Potential links between tropospheric and stratospheric extremes during the winter of 2019/20.................................. 44 COSMO-GHG simulations of 14C to support the design of a radiocarbon measurement network in Europe............................ 44 Sensitivity of gravity wave drag in seasonal experiments with ICON: Stratospheric dynamics and pathways......................... 45 Postprocessing of COSMO and IFS ensemble predictions for providing seamless forecasts.................................... 46 Evaluation of ICON-LAM Forecasting of a Strong Rain Eevent at the Coast of Sao Paulo State in Brazil........................... 46 Improving forecasts of wind resources by including two-way coupling between atmospheric flow and offshore wind farms.................. 47 Interaction between stratospheric equatorial waves and gravity waves and its implication in QBO simulation......................... 48 First steps towards 1 km horizontal resolution over Germany............... 48 9 Planetary Boundary Layer 50 A preliminary analysis of the impacts of small-scale orography on the stable atmospheric boundary layer........................... 50 A Budget-Based Turbulence Length Scale Diagnostic.................... 50 Evaluation of thermally driven local winds in the Swiss Alps simulated by COSMO-1....................................... 51 Slope winds in the convective boundary layer over mountainous terrain: LES results and parameterization approach...................... 51 Simulations of the Arctic atmospheric boundary layer around the MOSAiC drift track using ICON-LEM......................... 52 An improved sea ice parameterization and tile approach in CCLM............ 52 The two-energies turbulence scheme............................. 53 5 10 Predictability and Ensemble Systems 54 Choosing the Optimal Sub-Ensemble of Boundary Conditions to Drive Convection Permitting Ensemble............................ 54 Statistical and machine learning methods for postprocessing ensemble forecasts of wind gusts.................................. 54 Predictability analysis and verification of the Lightning Potential Index (LPI) in the COSMO-D2 high resolution EPS..................... 54 An estimation of the intrinsic predictability limit and required improve- ments to approach it................................... 55 11 Soil, Vegetation and Ocean 56 Marine extreme events in high-resolution coupled model simulations........... 56 Convergence of Richards Equation and Implications for Infiltration and Water Propagation.................................... 56 PT-SAINT {