[RegCNET] Non-hydrostatic RegCM4

[Erika Coppola]

Dear Michael,
we indeed have the non hydrostatic version of RegCM working, but you need to use the 4.7 version of the model that will be officially released at the workshop next May.
The non hydrostatic version was used in ICTP to simulate a 3km domain centered around the Alps and it was running stable up to  2 years in convection permitting mode. We used 41 vertical levels and we have two microphysical schemes available in the model. We  have a paper in which we examine 3 case studies of extreme precipitation events in this domain with an ensemble of convection permitting models and RegCM is there with 3 ensemble members. The paper will be out soon on Climate Dynamics special issue on convection permitting climate simulations.
We  also tested the non hydrostatic model over a domain in the California coast and in the African region of lake Victoria at the same resolution of the Alpine case.
If you need more information about the model version and how to access it please contact me or Graziano.
Best wishes 
Erika 


> On Mar 28, 2018, at 9:46 PM, Ufuk Turuncoglu <u.utku.turuncoglu at be.itu.edu.tr> wrote:
> 
> Hi Michael,
> 
> My personal experience is that it is still far from being stable. I tested it to simulate Hurricane Katrina using 3 km horizontal resolution plus 23 vertical layer (nested under 27 km case that covers almost entire Atlantic) but it crashes after couple of days even if i decrease the time step to very small numbers. It also creates some patchy output in the high resolution (at least in my version) case without any clue why. So, for non-hydrostatic applications i think you need to wait little bit more or you could choose any other model such as WRF, COSMO etc.
> 
> Regards,
> 
> --ufuk
> 
> From: "Michael Notaro" <mnotaro at wisc.edu>
> To: "Sridhara Nayak" <sridharanayakiitkgp at gmail.com>, "RegCNET" <regcnet at lists.ictp.it>
> Sent: Wednesday, March 28, 2018 10:59:01 AM
> Subject: Re: [RegCNET] Non-hydrostatic RegCM4
> 
> Thanks for your email.
> As far as I can tell, these papers all use the hydrostatic version of the model,
> not the non-hydrostatic, convection-resolving version.
> Michael
> 
> Michael Notaro
> Associate Director
> Nelson Institute Center for Climatic Research
> University of Wisconsin-Madison
> Phone: (608) 261-1503
> Email: mnotaro at wisc.edu
> 
> 
> From: Sridhara Nayak <sridharanayakiitkgp at gmail.com>
> Sent: Wednesday, March 28, 2018 12:54 PM
> To: Michael Notaro
> Subject: Re: [RegCNET] Non-hydrostatic RegCM4
>  
> Dear Michael,
> Follows are our few recent papers on RegCM4. Hope it helps.
> 
> Paper 1:
> Nayak, S., Mandal, M., & Maity, S. (2017). Customization of regional climate model (RegCM4) over Indian region. Theoretical and applied climatology, 127(1-2), 153-168. 
> https://www.researchgate.net/profile/Suman_Maity/publication/282893546_Customization_of_regional_climate_model_RegCM4_over_Indian_region/links/575e8b4c08ae414b8e54218b/Customization-of-regional-climate-model-RegCM4-over-Indian-region.pdf
> 
> Paper 2:
> Maity, S., Satyanarayana, A. N. V., Mandal, M., & Nayak, S. (2017). Performance evaluation of land surface models and cumulus convection schemes in the simulation of Indian summer monsoon using a regional climate model. Atmospheric Research, 197, 21-41. https://doi.org/10.1016/j.atmosres.2017.06.023 
> 
> Paper 3:
> Maity, S., Mandal, M., Nayak, S., & Bhatla, R. (2017). Performance of cumulus parameterization schemes in the simulation of Indian Summer Monsoon using RegCM4. Atmósfera, 30(4), 287-309. http://dx.doi.org/10.20937/ATM.2017.30.04.02
> 
> Best Regards
> Sridhara
> 
> On Thu, Mar 29, 2018 at 12:55 AM, Michael Notaro <mnotaro at wisc.edu> wrote:
> Are there any publications applying the non-hydrostatic version of RegCM4?
> 
> Or could anyone share their experience using the non-hydrostatic version,
> in terms of its performance and potential challenges?
> 
> Thanks, Michael
> 
> Michael Notaro
> Associate Director
> Nelson Institute Center for Climatic Research
> University of Wisconsin-Madison
> Phone: (608) 261-1503
> Email: mnotaro at wisc.edu
> 
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