[Wrf-users] 2m temperature error

[Feng Liu]

Hi Doyle,
You have taken cloud effect to the optical depth in radiation (icloud = 1) which only works for ra_sw_physics =1 and ra_lw_physics = 1 ). It makes no sense to compare the results if you take other long wave and short wave radiation schemes. Please refer to Page 5-42 in the USER's GUIDE. Thanks.
Feng
  

-----Original Message-----
From: wrf-users-bounces at ucar.edu [mailto:wrf-users-bounces at ucar.edu] On Behalf Of doyle at cima.fcen.uba.ar
Sent: Tuesday, February 22, 2011 10:21 AM
To: wrf-users at ucar.edu
Subject: [Wrf-users] 2m temperature error

Hi everyone

I am running WRF-ARW on a linux cluster with 16 processors over all south America with the following physics in the namelist

&physics
 mp_physics                          = 5,     3,     3,
 ra_lw_physics                       = 99,     1,     1,
 ra_sw_physics                       = 99,     1,     1,
 radt                                = 50,    30,    30,
 sf_sfclay_physics                   = 2,     1,     1,
 sf_surface_physics                  = 2,     2,     2,
 bl_pbl_physics                      = 2,     1,     1,
 bldt                                = 0,     0,     0,
 cu_physics                          = 2,     1,     0,
 cudt                                = 5,     5,     5,
 isfflx                              = 1,
 ifsnow                              = 1,
 icloud                              = 1,
 surface_input_source                = 1,
 num_soil_layers                     = 4,
 sf_urban_physics                    = 0,     0,     0,
 maxiens                             = 1,
 maxens                              = 3,
 maxens2                             = 3,
 maxens3                             = 16,
 ensdim                              = 144,


When I look at the 2m temperature field (first figure in the pdf file) it seems to behave with horizontal stripes, far from reality. When I change  ra_lw_physics and  ra_sw_physics to 1 the field is close to reality (figure 2). The same occurs when changing just one ra_lw_physics or ra_sw_physics  (figures 3 and 4). I tried running ARW V3.2.1 and 3.0 and find the same problem, in the last case with values vary far from reality.

Has anyone run using this physics configuration? Any idea why this combination is not working?

Thanks a lot

Moira Doyle
Dpt Atmospheric and Oceanic Sciences
Univ. Buenos Aires



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en busca de virus y otros contenidos peligrosos,
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