A representation of the collisional ice break-up process in the two-moment microphysics LIMA v1.0 scheme of Meso-NH

Hoarau, Thomas; Pinty, Jean-Pierre; Barthe, Christelle

doi:https://doi.org/10.5194/gmd-11-4269-2018

Articles | Volume 11, issue 10

https://doi.org/10.5194/gmd-11-4269-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/gmd-11-4269-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 11, issue 10

Model description paper

|

18 Oct 2018

Model description paper |

| 18 Oct 2018

A representation of the collisional ice break-up process in the two-moment microphysics LIMA v1.0 scheme of Meso-NH

Thomas Hoarau, Jean-Pierre Pinty, and Christelle Barthe

Model code and software

Meso-NH code version 5.1.2 J.-P. Chaboureau http://mesonh.aero.obs-mip.fr/mesonh51

Supplement: A representation of the collisional ice break-up process in the two-moment microphysics scheme LIMA v1.0 of Meso-NH T. Hoarau, J.-P. Pinty and C. Barthe https://doi.org/10.5281/zenodo.1078527

Short summary

The break-up of ice crystals in clouds is a possible secondary ice multiplication process to explain observations of very high concentrations of small ice crystals at cold temperature. Here, the process is modeled by considering shocks between fragile aggregates (assemblage of pristine crystals) and large densely rimed crystals of selected sizes. The simulations of two storms illustrate the perturbations caused by the break-up effect (precipitation, ice concentration enhancement).