1. workshop2015
3. workshop2015

Workshop on Eulerian vs. Lagrangian methods for cloud microphysics

The cloud-aerosol modelling team at the Institute of Geophysics, Faculty of Physics, University of Warsaw, Poland organised a workshop aimed at bringing together researchers working on modelling cloud microphysics.

The workshop took place in Warsaw on April 20-22, 2015, in the CeNT building at the "Ochota Campus" of the University of Warsaw.

TOPICS AND FORMAT

The workshop topics covered formulation, implementation and validation of numerical models of aerosol, cloud and precipitation microphysics.

The axis of the workshop was the juxtaposition of the Eulerian (bulk or bin) and the Lagrangian (particle-based) methods for modelling clouds.

The workshop featured three types of sessions: full-length introductory lectures, short presentations as well as discussion panels on topics announced prior to the workshop.

PROGRAMME

• Monday, April 20, 2015

  • Session I
    • 15 min. Hanna Pawlowska, Sylwester Arabas (U. Warsaw, Poland):
      Welcome & Practicalities
    • 40 min. Wojciech Grabowski (NCAR, USA):
      Cloud microphysics modelling: the state of the art
  • Session II
    • 40 min. Jean-Louis Brenguier (Meteo-France):
      How observations shall be used to constrain numerical simulations
    • 20 min. Daniel Partridge (Stockholm Univ., Sweden):
      Comparing droplet activation parameterisations against adiabatic parcel models using a novel inverse modelling framework
  • Session III
    • 40 min. Shin-ichiro Shima (U. Hyogo, Japan):
      Particle-based and probabilistic methods for warm-rain cloud microphysics
    • 20 min. Ann Kristin Naumann (MPI-Met, Germany):
      A Lagrangian drop model to study warm rain microphysics
  • Session IV
    • 20 min. Fabian Hoffmann (U. Hannover, Germany):
      Spurious Cloud Edge Supersaturations in Lagrangian Cloud Models
    • 20 min. Sylwester Arabas, Anna Jaruga, Piotr Dziekan (U. Warsaw, Poland):
      Lagrangian warm-rain microphysics in libcloudph++
    • 20 min. Dorota Jarecka (U. Warsaw, Poland; NCAR, US):
      Calling Microphysical Schemes from WRF and libcloudph++ using Python
  • Discussion
    • 40 min. Jean-Louis Brenguier (chair) (Meteo-France):
      The physical processes we are missing in cloud models
  • Reception at the Ujazdow Castle (20:00 - 23:00)

• Tuesday, April 21, 2015

  • Session I
    • 40 min. Raymond Shaw (Michigan Tech., USA):
      Particle-turbulence interactions in atmospheric clouds
    • 20 min. Katarzyna Karpinska (U. Warsaw, Poland):
      Cloud droplets in small vortices
  • Session II
    • 20 min. Alberto de Lozar (MPI-Met, Germany):
      Radiative growth of lagrangian droplets in a DNS of the stratocumulus cloud top
    • 20 min. Gaetano Sardina (Stockholm Univ., Sweden):
      Numerical study of droplet growth growth by condensation by means of massive DNS simulations
    • 20 min. Svitlana Krakovska (UHMI, Ukraine):
      Combined Model of Cloudy Troposphere (CMCT) as compromise of Eulerian and Lagrangian approaches
  • Session III
    • 40 min. Piotr Smolarkiewicz (ECMWF, UK):
      Lagrangian/Eulerian equivalence for forward in time differencing for fluids
    • 20 min. Anna Jaruga, Sylwester Arabas, Maciej Waruszewski (U. Warsaw, Poland):
      On the design and cloud-modelling applications of libmpdata++
  • Session IV
    • 40 min. Simon Unterstrasser (DLR, Germany):
      The Lagrangian ice microphysics code LCM within EULAG: basic overview and selected application examples
    • 20 min. Volodymyr Khotiaintsev (U. Kyiv, Ukraine):
      Numerically efficient description of homogeneous mixed cloud microphysics
  • Discussion
    • 40 min. Alberto de Lozar (chair) (MPI-Met, Germany):
      Buoyancy - the key link between dynamics and microphysics

• Wednesday, April 22, 2015

  • Session I
    • 40 min. Frederick Chosson (McGill University, Canada):
      Double moment microphysics schemes for Numerical Weather Prediction models: why and how?
    • 20 min. Adrian Hill (Met Office, UK):
      How different are aerosol-cloud interactions in different schemes?
      Initial results from the GASS KiD-A intercomparison.
  • Session II
    • 20 min. Bogdan Rosa (IMGW/NHMS, Poland):
      Effects of forcing time scale on the simulated turbulent flows and turbulent collision statistics of cloud droplets
    • 20 min. Wojciech Grabowski (NCAR, USA):
      Untangling microphysical impacts on deep convection using microphysical piggybacking
    • 5 min. Raymond Shaw (Michigan Tech., USA):
      EMPM vs DNS results of Kumar, Schumacher and Shaw (2014)
  • Discussion
    • 40 min. Adrian Hill (chair) (Met Office, UK):
      How to benchmark our schemes?

GROUP PHOTOS

Please click to enlarge

FURTHER INFORMATION

For any further information, please contact Sylwester Arabas (sarabas@igf.fuw.edu.pl).

FUNDING

The workshop was organised within the framework of a joint U.Warsaw-NCAR-ECMWF project funded by the Poland's National Science Centre (decision no. 2012/06/M/ST10/00434).

1. University of Warsaw
2. May 2015
3. workshop2015