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<DIV dir=ltr align=left><SPAN class=958065215-04052009><FONT face=Arial
color=#0000ff size=2>Dear Eduardo Penabad,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=958065215-04052009><FONT face=Arial
color=#0000ff size=2>my possible answer to problem (1): You may
check down-scale options in WRFV3/share/interp_fcn.F for your needs. (2):
For the coarsest domain, parent_id should be set to 1 other than 0. You may
ensure your domain specifications are not illegal, for example, by
plotgrids.exe. Hope it is helpful.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=958065215-04052009><FONT face=Arial
color=#0000ff size=2>Feng</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> wrf-users-bounces@ucar.edu
[mailto:wrf-users-bounces@ucar.edu] <B>On Behalf Of </B>Eduardo Penabad
Ramos<BR><B>Sent:</B> Friday, April 24, 2009 4:52 AM<BR><B>To:</B> 'wrfhelp';
wrf-users@ucar.edu<BR><B>Cc:</B> numerico@meteogalicia.es<BR><B>Subject:</B>
[Wrf-users] different problems with nesting in WRF-NMM<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2><SPAN class=086215612-23042009>Dear
users,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=086215612-23042009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=086215612-23042009>In my institution,
we are testing NMM core of WRF in order to use it in some of our
operational tasks. In this early stage of implementation in our computing
environment we are facing with some troubles. Here they come a
couple of them:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=086215612-23042009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=086215612-23042009> (1) Static
fields resolution at nested grids:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=086215612-23042009> WRF static fields in nested
grid outputs (i.e. LU_INDEX, LANDMASK, etc in wrfout_d02 file) look like they
have the coarser (d01) resolution. I mean, this fields have values with d02
resolution, but this values are diamond-shaped seeming to be just a downscaling
of d01 fields. The question is.... does WRF model use those fields written in
the wrfout file or does it use those written in the geo_nmm.nest.l01.nc file? if
this were the case, why WRF model doesn't dump the high-resolution fields in
wrfout file?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=086215612-23042009> (2) Nested domain too close to the boundary
of parent (WRF says):</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=086215612-23042009>
We are running (let's say, trying to run) a 3 nests configuration
(d01 @ 36km, d02 @ 12 km and d03 @ 4 km) with the namelist.input domains data
attached below. With i,j_parent_start values for d03 (56,76) and d02 e_we
and e_sn values (121,196) one should expect that a d03 grid with e_we=82
and e_sn=182 will run, but I'm getting this error. Am I doing something
wrong? </SPAN></FONT></DIV>
<DIV><FONT size=2><SPAN class=086215612-23042009><FONT face=Arial></FONT><FONT
face=Arial></FONT><FONT face=Arial></FONT></SPAN></FONT> </DIV>
<DIV><FONT face="Courier New" size=2><SPAN class=086215612-23042009><SPAN
class=086215612-23042009> -------------- FATAL CALLED
---------------<BR> FATAL CALLED FROM FILE: NMM_NEST_UTILS1.b
LINE: 779<BR> 1H:NESTED DOMAIN TOO CLOSE TO THE
BOUNDARY OF
PARENT<BR> -------------------------------------------</SPAN></SPAN></FONT></DIV>
<DIV><FONT size=2><SPAN class=086215612-23042009><FONT
face=Arial></FONT></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=086215612-23042009>namelist.input
details:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=086215612-23042009></SPAN></FONT> </DIV>
<DIV><SPAN class=086215612-23042009><FONT size=2> </FONT><FONT
face="Courier New"
size=2>&domains<BR> time_step
=
90,<BR> time_step_fract_num
=
0,<BR> time_step_fract_den
=
7,<BR> max_dom
=
3,<BR> e_we
= 84, 121,
82<BR> e_sn
= 150, 196,
182<BR> e_vert
= 28, 28,
28<BR> num_metgrid_levels
=
27,<BR> dx
=
.233211<BR> dy
=
.228236<BR> p_top_requested
=
5000.<BR> ptsgm
=
42000.,<BR> grid_id
= 1, 2,
3<BR> parent_id
= 0, 1,
2<BR> i_parent_start
= 1, 32,
56<BR> j_parent_start
= 1, 38,
76<BR> parent_grid_ratio
= 1, 3,
3<BR> parent_time_step_ratio
= 1, 3, 3<BR> /</FONT></DIV>
<DIV><FONT size=2><FONT face=Arial></FONT><FONT
face=Arial></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><SPAN class=086215612-23042009><FONT face=Arial size=2>Thanks in advance
for your help!</FONT></SPAN></DIV>
<DIV><SPAN class=086215612-23042009><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=086215612-23042009><FONT face=Arial size=2>Eduardo
Penabad</FONT></SPAN></DIV>
<DIV><SPAN class=086215612-23042009><FONT face=Arial size=2>NWP Department.
MeteoGalicia</FONT></SPAN></SPAN></DIV></BODY></HTML>