[Wrf-users] 2m temperature error

[doyle at cima.fcen.uba.ar]

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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