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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 04 Feb 2019

Model description paper | 04 Feb 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

University of Warsaw Lagrangian Cloud Model (UWLCM) 1.0: a modern Large-Eddy Simulation tool for warm cloud modeling with Lagrangian microphysics

Piotr Dziekan, Maciej Waruszewski, and Hanna Pawlowska Piotr Dziekan et al.
  • Institute of Geophysics, Faculty of Physics, University of Warsaw, Poland

Abstract. A new anelastic large-eddy simulation model with an Eulerian dynamical core and a Lagrangian particle-based microphysics is presented. The dynamical core uses the MPDATA advection scheme and the generalized conjugate residual pressure solver, while the microphysics scheme is based on the Super-Droplet Method. Algorithms for coupling of the Lagrangian microphysics with the Eulerian dynamics are presented, including spatial and temporal discretizations and a condensation sub-stepping algorithm. The model is free of numerical diffusion in the droplet size spectrum. Activation of droplets is modeled explicitly, making the model less sensitive to local supersaturation maxima than models in which activation is parametrised. Simulations of a drizzling marine stratocumulus give results in agreement with other LES models. Relatively low number of computational particles is sufficient to obtain the correct averaged properties of a cloud. High computational performance is achieved thanks to the use of GPU accelerators.

Piotr Dziekan et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Piotr Dziekan et al.
Piotr Dziekan et al.
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