[Wrf-users] Question regarding physical parameterization

[Eric Altshuler]

It is recommended that you use the same parameterization schemes on all domains, with one exception: for domains finer than ~5 km horizontal resolution, you can turn off the cumulus parameterization scheme. However, the 5-km value is not absolute; different users may choose to keep the convection scheme active on high-resolution domains, depending on the purpose of their experiment. The appropriate convection/no-convection threshold may also depend on which convection scheme is used. You may want to run your experiment with and without convection scheme on the 3-km domain, and compare your results to assess the impact of using the parameterization.

Best regards,

Eric L. Altshuler
Assistant Research Scientist
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
USA

E-mail: ela at cola.iges.org
Phone: (301) 902-1257
Fax: (301) 595-9793

----- Original Message -----
From: "wei huang" <whua27 at gmail.com>
To: "wrf-users" <wrf-users at ucar.edu>
Sent: Wednesday, May 2, 2012 10:03:16 AM
Subject: [Wrf-users] Question regarding physical parameterization

Dear WRF users,
My questions are given below regarding physical parametrization
schemes used in the WRF model. Kindly, your support regarding my
question will be highly appreciated.
thanks and regards,
=================================
The physical parameterization schemes used in the WRF-ARW model
simulations for domains 1,2, and 3 respectively, given below.

Horizontal resolution 30, 10, & 3 km respectively
Vertical level 	27
Cumulus convection  Kian-Fritch
Boundary layer 	Yonsei University
Surface layer 	Monin Obukhov
Microphysics 		Lin (Purdue)
Land surface 		Noah
Shortwave radiation dudhia
Longwave radiation  rapid radiative transfer


Q.1. From the list above is it possible we can use the same physics
package for the 3 model domains?
Q.2. Can we use convection parameterization at 3-km horizontal resolution?
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