Preprints
https://doi.org/10.5194/gmd-2020-435
https://doi.org/10.5194/gmd-2020-435

Submitted as: development and technical paper 31 Mar 2021

Submitted as: development and technical paper | 31 Mar 2021

Review status: a revised version of this preprint was accepted for the journal GMD and is expected to appear here in due course.

Non-Hydrostatic RegCM4 (RegCM4-NH): Model description and case studies over multiple domains

Erika Coppola1, Paolo Stocchi2, Emanuela Pichelli1, Jose Abraham Torres Alavez1, Russell Glazer1, Graziano Giuliani1, Fabio Di Sante1, Rita Nogherotto1, and Filippo Giorgi1 Erika Coppola et al.
  • 1International Centre for Theoretical Physics (ICTP),Trieste, Italy
  • 2Institute of Atmospheric Sciences and Climate, National Research Council of Italy, CNR-ISAC, Bologna, Italy

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 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 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.

Erika Coppola et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2020-435', Anonymous Referee #1, 01 May 2021
  • RC2: 'Comment on gmd-2020-435', Anonymous Referee #2, 28 May 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2020-435', Anonymous Referee #1, 01 May 2021
  • RC2: 'Comment on gmd-2020-435', Anonymous Referee #2, 28 May 2021

Erika Coppola et al.

Erika Coppola et al.

Viewed

Total article views: 700 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
422 263 15 700 10 7
  • HTML: 422
  • PDF: 263
  • XML: 15
  • Total: 700
  • BibTeX: 10
  • EndNote: 7
Views and downloads (calculated since 31 Mar 2021)
Cumulative views and downloads (calculated since 31 Mar 2021)

Viewed (geographical distribution)

Total article views: 650 (including HTML, PDF, and XML) Thereof 650 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Latest update: 29 Nov 2021
Download
Short summary
In this work we describe the development of a non-hydrostatic version of the regional climate model RegCM4-NH, implemented to allow simulations at convection-permitting scale of few km (< 4 km) for climate applications. The new core is described and three case studies of intense convection are carried out to illustrate the model performances. Comparison with observations is much improved respect with coarse grid runs. RegCM4-NH offers a promising tool for climate investigations at local scale.