In:
Geoscientific Model Development, Copernicus GmbH, Vol. 14, No. 12 ( 2021-12-21), p. 7705-7723
Abstract:
Abstract. We describe the development of a non-hydrostatic version
of the regional climate model RegCM4, called RegCM4-NH, for use at
convection-permitting resolutions. The non-hydrostatic dynamical core of the
Mesoscale Model MM5 is introduced in the RegCM4, with some modifications to
increase stability and applicability of the model to long-term climate
simulations. Newly available explicit microphysics schemes are also
described, and three case studies of intense convection events are carried
out in order to illustrate the performance of the model. They are all run at a convection-permitting grid spacing of 3 km over domains in northern
California, Texas and the Lake Victoria region, without the use of
parameterized cumulus convection. A substantial improvement is found in
several aspects of the simulations compared to corresponding coarser-resolution (12 km) runs completed with the hydrostatic version of the model
employing parameterized convection. RegCM4-NH is currently being used in
different projects for regional climate simulations at convection-permitting
resolutions and is intended to be a resource for users of the RegCM
modeling system.
Type of Medium:
Online Resource
ISSN:
1991-9603
DOI:
10.5194/gmd-14-7705-2021
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2021
detail.hit.zdb_id:
2456725-5
