[gradsusr] WRF data in grads: Problem with the levels
jl sa
esjluis at yahoo.com.mx
Thu Sep 15 10:52:09 EDT 2011
hola si los datos son del WRF, trata de modificar el namelist.ARWPOST del modelo y ahi indica los niveles de presion ya sean milibarios o si los quieres en niveles sigma, ejemplo:
si es para milibarios
&interp
interp_method = 1,
interp_levels = 1000.,950.,900.,850.,800.,750.,700.,650.,600.,550.,500.,450.,400.,350.,300.,250.,200.,150.,100.,
/
si es para sigma :
&interp
interp_method = 0,
interp_levels = 0.994, 1.00, 1.02, 1.03, 1.058, 1.099, 1.141, 1.183, 1.208, 1.233, 1.258, 1.283, 1.308, 1.333, 1.383, 1.433, 1.483, 1.533, 1.583, 1.633, 1.683, 1.733, 1.783, 1.833, 1.883, 1.933, 1.983, 2.0, 2.5, 3.00, 3.5, 4.00, 4.5, 5.0, 7.5, 10.0, 12.5, 15.0, 20.0,
espero esto te ayude.
hello if the data are from the WRF, about changing the model and there namelist.ARWPOST indicates levels of pressure either millibars or if you want to sigma levels, eg
if it is in millibars
&interp
interp_method = 1,
interp_levels = 1000.,950.,900.,850.,800.,750.,700.,650.,600.,550.,500.,450.,400.,350.,300.,250.,200.,150.,100.,
/
if for sigma:
&interp
interp_method = 0,
interp_levels = 0.994, 1.00, 1.02, 1.03, 1.058, 1.099, 1.141, 1.183,
1.208, 1.233, 1.258, 1.283, 1.308, 1.333, 1.383, 1.433, 1.483, 1.533,
1.583, 1.633, 1.683, 1.733, 1.783, 1.833, 1.883, 1.933, 1.983, 2.0,
2.5, 3.00, 3.5, 4.00, 4.5, 5.0, 7.5, 10.0, 12.5, 15.0, 20.0,
atte
jluis
________________________________
WRF data in grads: Problem with the levels (Catherine Meissner)
----------------------------------------------------------------------
Message: 3
Date: Thu, 15 Sep 2011 10:38:54 +0200
From: "Catherine Meissner" <catherine at windsim.com>
Subject: [gradsusr] WRF data in grads: Problem with the levels
To: <gradsusr at gradsusr.org>
Message-ID: <008301cc7382$e73d51c0$b5b7f540$@com>
Content-Type: text/plain; charset="iso-8859-1"
Hello,
I am using WRF data files in GrADS version 2.0.a9oga, in windows.
Having been unable to open the WRF files using xdfopen or sdfopen I have
written my own CTL file in order to open the data. Everything is working for
me except that the z levels which the file contains do not seem to
correspond to the pressure. The nc dump suggests there are 29 levels (which
is correct as there were 29 eta levels in the WRF file).
However the range of
these levels is from 2986950,2887400,2787850 ... up to 199550, 100000. How
can these numbers be related to pressure?
All I need to know is what these Z levels mean and how I can wither convert
them to pressure or to height. Thanks for any help offered.
The Corresponding CTL file is:
dset ^wrfout_d02_%y4-%m2-%d2_%h2_%n2_00
dtype netcdf
title "Iberdrola data for Jan2008"
undef -1e+30
options template
pdef 140 140 lcc 33.87970 -11.30862777011 1 1 43.427 43.427 -3.839993 10000
10000 xdef 140 linear -4.5000000 0.004 ydef 140 linear 41.950000 0.0032 zdef
30 linear 2986950 2887400,
2787850,2688300,2588750,2489200,2389650,2290100,2190550,2091000,1991450,1891
800,1792300,1692800,1593250,1493700,1394150,1294600,1195050,1095500,995950,8
96400,
796850,697300,597750,498200,398650,299100,199550,100000
tdef 480 linear 00:00Z01jan2008 1hr
vars 4
U=>u 29 t,z,y,x westerly wind
V=>v 29 t,z,y,x southerly wind
P=>p 29 t,z,y,x Pressure
T=>t 29 t,z,y,x perturbation potential temperature (theta-t0)
Endvars
the ncdump is:
netcdf wrfout_d02_2007-12-31_18_00_00 {
dimensions:
Time = UNLIMITED ; // (1 currently)
DateStrLen = 19 ;
west_east = 140 ;
south_north = 140 ;
bottom_top = 29 ;
bottom_top_stag = 30 ;
soil_layers_stag = 4 ;
west_east_stag = 141 ;
force_layers = 8 ;
south_north_stag = 141 ;
variables:
char Times(Time, DateStrLen) ;
float LU_INDEX(Time, south_north, west_east) ;
LU_INDEX:FieldType = 104 ;
LU_INDEX:MemoryOrder = "XY " ;
LU_INDEX:description = "LAND USE CATEGORY" ;
LU_INDEX:units = "" ;
LU_INDEX:stagger = "" ;
LU_INDEX:coordinates = "XLONG XLAT" ;
float ZNU(Time, bottom_top) ;
ZNU:FieldType = 104 ;
ZNU:MemoryOrder = "Z " ;
ZNU:description = "eta values on half (mass) levels" ;
ZNU:units = "" ;
ZNU:stagger = "" ;
float ZNW(Time, bottom_top_stag) ;
ZNW:FieldType = 104 ;
ZNW:MemoryOrder = "Z " ;
ZNW:description = "eta values on full (w) levels" ;
ZNW:units = "" ;
ZNW:stagger = "Z" ; (... and many more variables
listed)
// global attributes:
:TITLE = " OUTPUT FROM WRF V3.1.1 MODEL" ;
:START_DATE = "2007-12-31_18:00:00" ;
:SIMULATION_START_DATE = "2007-12-31_18:00:00" ;
:WEST-EAST_GRID_DIMENSION = 141 ;
:SOUTH-NORTH_GRID_DIMENSION = 141 ;
:BOTTOM-TOP_GRID_DIMENSION = 30 ;
:DX = 10000.f ;
:DY = 10000.f ;
:GRIDTYPE = "C" ;
:DIFF_OPT = 1 ;
:KM_OPT = 4 ;
:DAMP_OPT = 0 ;
:DAMPCOEF = 0.2f ;
:KHDIF = 0.f ;
:KVDIF = 0.f ;
:MP_PHYSICS = 6 ;
:RA_LW_PHYSICS = 1 ;
:RA_SW_PHYSICS = 1 ;
:SF_SFCLAY_PHYSICS = 2 ;
:SF_SURFACE_PHYSICS = 2 ;
:BL_PBL_PHYSICS = 2 ;
:CU_PHYSICS = 0 ;
:SURFACE_INPUT_SOURCE = 1 ;
:SST_UPDATE = 0 ;
:GRID_FDDA = 0 ;
:GFDDA_INTERVAL_M = 0 ;
:GFDDA_END_H = 0 ;
:GRID_SFDDA = 0 ;
:SGFDDA_INTERVAL_M = 0 ;
:SGFDDA_END_H = 0 ;
:SF_URBAN_PHYSICS = 0 ;
:FEEDBACK = 1 ;
:SMOOTH_OPTION = 0 ;
:SWRAD_SCAT = 1.f ;
:W_DAMPING = 0 ;
:MOIST_ADV_OPT = 1 ;
:SCALAR_ADV_OPT = 1 ;
:TKE_ADV_OPT = 1 ;
:DIFF_6TH_OPT = 0 ;
:DIFF_6TH_FACTOR = 0.12f ;
:OBS_NUDGE_OPT = 0 ;
:WEST-EAST_PATCH_START_UNSTAG = 1 ;
:WEST-EAST_PATCH_END_UNSTAG = 140 ;
:WEST-EAST_PATCH_START_STAG = 1 ;
:WEST-EAST_PATCH_END_STAG = 141 ;
:SOUTH-NORTH_PATCH_START_UNSTAG = 1 ;
:SOUTH-NORTH_PATCH_END_UNSTAG = 140 ;
:SOUTH-NORTH_PATCH_START_STAG = 1 ;
:SOUTH-NORTH_PATCH_END_STAG = 141 ;
:BOTTOM-TOP_PATCH_START_UNSTAG = 1 ;
:BOTTOM-TOP_PATCH_END_UNSTAG = 29 ;
:BOTTOM-TOP_PATCH_START_STAG = 1 ;
:BOTTOM-TOP_PATCH_END_STAG = 30 ;
:GRID_ID = 2 ;
:PARENT_ID = 1 ;
:I_PARENT_START = 14 ;
:J_PARENT_START = 10 ;
:PARENT_GRID_RATIO = 5 ;
:DT = 60.f ;
:CEN_LAT = 40.5046f ;
:CEN_LON = -3.839993f ;
:TRUELAT1 = 43.427f ;
:TRUELAT2 = 43.427f ;
:MOAD_CEN_LAT = 43.427f ;
:STAND_LON = -3.84f ;
:POLE_LAT = 90.f ;
:POLE_LON = 0.f ;
:GMT = 18.f ;
:JULYR = 2007 ;
:JULDAY = 365 ;
:MAP_PROJ = 1 ;
:MMINLU = "" ;
:NUM_LAND_CAT = 24 ;
:ISWATER = 16 ;
:ISLAKE = 0 ;
:ISICE = 0 ;
:ISURBAN = 0 ;
:ISOILWATER = 0 ;
}
Catherine Meissner
Software Development Manager
Fjordgaten 15
N-3125 T?nsberg, Norway
Switchboard +47 33 38 18 00
<http://www.windsim.com/> www.windsim.com
Email
Direct
Fax
<mailto:kristine at windsim.com> catherine at windsim.com
+47 33 38 18 06
+47 33 38 18 08
Upcoming WindSim events:
Brazil WindPower 2011
August 31 ? 2, Rio de Janeiro, Brazil
Booth 141
VIND 2011
September 14 ? 15, Stockholm, Sweden
EOLICA EXPO 2011
September 14 ? 16, Rome, Italy
Booth B8/C7
GREEN EXPO 2011
September 27 ? 29, Mexico City, Mexico
WIND POWER EXPO+
September 27 ? 29, Zaragoza, Spain
CanWEA
October 3 ? 6, Vancouver, Canada
For upcoming WindSim training courses, please visit:
<http://www.windsim.com/events/training-courses.aspx>
http://www.windsim.com/events/training-courses.aspx
This message contains information that may be privileged or
confidential and is the property of WindSim AS. It is intended
only for the person to whom it is addressed. If you are not the
intended recipient, you are not authorized to print, retain, copy,
disseminate, distribute, or use this message or any part thereof.
If you receive this message in error, please notify the sender
immediately and delete all copies of this message.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110915/bfebc847/attachment.html
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 1984 bytes
Desc: not available
Url : http://gradsusr.org/pipermail/gradsusr/attachments/20110915/bfebc847/attachment.png
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 1790 bytes
Desc: not available
Url : http://gradsusr.org/pipermail/gradsusr/attachments/20110915/bfebc847/attachment.jpe
------------------------------
_______________________________________________
gradsusr mailing list
gradsusr at gradsusr.org
http://gradsusr.org/mailman/listinfo/gradsusr
End of gradsusr Digest, Vol 19, Issue 27
****************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110915/c7a3f3f0/attachment-0003.html
More information about the gradsusr
mailing list