<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>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:</div><div><br></div><div>si es para milibarios</div><div>&interp<br> interp_method = 1,<br> interp_levels = 1000.,950.,900.,850.,800.,750.,700.,650.,600.,550.,500.,450.,400.,350.,300.,250.,200.,150.,100.,<br>/<br>si es para sigma :</div><div>&interp<br> interp_method = 0,<br>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,<br></div><div><br></div><div>espero esto te ayude.</div><div><span id="result_box"
class="" lang="en"><span class="hps">hello</span> <span class="hps">if the data</span> <span class="hps">are from the</span> <span class="hps">WRF,</span> <span class="hps">about changing the</span> <span class="hps">model and</span> <span class="hps">there</span> <span class="hps">namelist.ARWPOST</span> <span class="hps">indicates levels of</span> <span class="hps">pressure</span> <span class="hps">either</span> <span class="hps">millibars</span> <span class="hps">or if</span> <span class="hps">you want to</span> <span class="hps">sigma</span> <span class="hps">levels</span><span class="">, eg</span><br><br><br> <span class="hps">if it is in</span> <span class="hps">millibars</span></span></div><div>&interp<br>
interp_method = 1,<br>
interp_levels = 1000.,950.,900.,850.,800.,750.,700.,650.,600.,550.,500.,450.,400.,350.,300.,250.,200.,150.,100.,<br>
/</div><div><span id="result_box" class="short_text" lang="en"><span class="hps">if for</span> <span class="hps">sigma:</span></span></div><div>&interp<br>
interp_method = 0,<br>
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,</div><div>atte</div><div>jluis</div><div><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Arial" size="2"><hr size="1"><b><span style="font-weight: bold;"></span></b></font><br> WRF data in grads: Problem with the levels (Catherine Meissner)<br><br><br>----------------------------------------------------------------------<br><br><br><br>Message: 3<br>Date: Thu, 15 Sep 2011 10:38:54 +0200<br>From: "Catherine Meissner" <<a ymailto="mailto:catherine@windsim.com" href="mailto:catherine@windsim.com">catherine@windsim.com</a>><br>Subject: [gradsusr] WRF data in grads: Problem with the levels<br>To: <<a ymailto="mailto:gradsusr@gradsusr.org" href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>><br>Message-ID:
<008301cc7382$e73d51c0$b5b7f540$@com><br>Content-Type: text/plain; charset="iso-8859-1"<br><br>Hello,<br><br> <br><br>I am using WRF data files in GrADS version 2.0.a9oga, in windows. <br><br>Having been unable to open the WRF files using xdfopen or sdfopen I have<br>written my own CTL file in order to open the data. Everything is working for<br>me except that the z levels which the file contains do not seem to<br>correspond to the pressure. The nc dump suggests there are 29 levels (which<br>is correct as there were 29 eta levels in the WRF file). <br><br>However the range of<br><br>these levels is from 2986950,2887400,2787850 ... up to 199550, 100000. How<br>can these numbers be related to pressure?<br><br> <br><br>All I need to know is what these Z levels mean and how I can wither convert<br>them to pressure or to height. Thanks for any help offered.<br><br> <br><br>The Corresponding CTL file is:<br><br> <br><br>dset
^wrfout_d02_%y4-%m2-%d2_%h2_%n2_00<br><br>dtype netcdf<br><br>title "Iberdrola data for Jan2008"<br><br>undef -1e+30<br><br>options template<br><br>pdef 140 140 lcc 33.87970 -11.30862777011 1 1 43.427 43.427 -3.839993 10000<br>10000 xdef 140 linear -4.5000000 0.004 ydef 140 linear 41.950000 0.0032 zdef<br>30 linear 2986950 2887400,<br>2787850,2688300,2588750,2489200,2389650,2290100,2190550,2091000,1991450,1891<br>800,1792300,1692800,1593250,1493700,1394150,1294600,1195050,1095500,995950,8<br>96400,<br><br>796850,697300,597750,498200,398650,299100,199550,100000<br><br>tdef 480 linear 00:00Z01jan2008 1hr<br><br> <br><br>vars 4<br><br>U=>u 29 t,z,y,x westerly wind<br><br>V=>v 29 t,z,y,x southerly wind<br><br>P=>p 29 t,z,y,x Pressure<br><br>T=>t 29 t,z,y,x perturbation
potential temperature (theta-t0)<br><br>Endvars<br><br> <br><br>the ncdump is:<br><br> <br><br>netcdf wrfout_d02_2007-12-31_18_00_00 {<br><br>dimensions:<br><br> Time = UNLIMITED ; // (1 currently)<br><br> DateStrLen = 19 ;<br><br> west_east = 140 ;<br><br> south_north = 140 ;<br><br> bottom_top = 29 ;<br><br> bottom_top_stag = 30 ;<br><br> soil_layers_stag = 4 ;<br><br> west_east_stag = 141 ;<br><br> force_layers = 8 ;<br><br> south_north_stag = 141 ;<br><br>variables:<br><br> char Times(Time, DateStrLen) ;<br><br> float LU_INDEX(Time, south_north, west_east) ;<br><br>
LU_INDEX:FieldType = 104 ;<br><br> LU_INDEX:MemoryOrder = "XY " ;<br><br> LU_INDEX:description = "LAND USE CATEGORY" ;<br><br> LU_INDEX:units = "" ;<br><br> LU_INDEX:stagger = "" ;<br><br> LU_INDEX:coordinates = "XLONG XLAT" ;<br><br> float ZNU(Time, bottom_top) ;<br><br> ZNU:FieldType = 104 ;<br><br> ZNU:MemoryOrder = "Z " ;<br><br> ZNU:description = "eta values on half (mass) levels" ;<br><br> ZNU:units = ""
;<br><br> ZNU:stagger = "" ;<br><br> float ZNW(Time, bottom_top_stag) ;<br><br> ZNW:FieldType = 104 ;<br><br> ZNW:MemoryOrder = "Z " ;<br><br> ZNW:description = "eta values on full (w) levels" ;<br><br> ZNW:units = "" ;<br><br> ZNW:stagger = "Z" ; (... and many more variables<br>listed)<br><br>// global attributes:<br><br> :TITLE = " OUTPUT FROM WRF V3.1.1 MODEL" ;<br><br> :START_DATE = "2007-12-31_18:00:00" ;<br><br>
:SIMULATION_START_DATE = "2007-12-31_18:00:00" ;<br><br> :WEST-EAST_GRID_DIMENSION = 141 ;<br><br> :SOUTH-NORTH_GRID_DIMENSION = 141 ;<br><br> :BOTTOM-TOP_GRID_DIMENSION = 30 ;<br><br> :DX = 10000.f ;<br><br> :DY = 10000.f ;<br><br> :GRIDTYPE = "C" ;<br><br> :DIFF_OPT = 1 ;<br><br> :KM_OPT = 4 ;<br><br> :DAMP_OPT = 0 ;<br><br> :DAMPCOEF = 0.2f ;<br><br>
:KHDIF = 0.f ;<br><br> :KVDIF = 0.f ;<br><br> :MP_PHYSICS = 6 ;<br><br> :RA_LW_PHYSICS = 1 ;<br><br> :RA_SW_PHYSICS = 1 ;<br><br> :SF_SFCLAY_PHYSICS = 2 ;<br><br> :SF_SURFACE_PHYSICS = 2 ;<br><br> :BL_PBL_PHYSICS = 2 ;<br><br> :CU_PHYSICS = 0 ;<br><br> :SURFACE_INPUT_SOURCE = 1 ;<br><br> :SST_UPDATE = 0 ;<br><br> :GRID_FDDA = 0
;<br><br> :GFDDA_INTERVAL_M = 0 ;<br><br> :GFDDA_END_H = 0 ;<br><br> :GRID_SFDDA = 0 ;<br><br> :SGFDDA_INTERVAL_M = 0 ;<br><br> :SGFDDA_END_H = 0 ;<br><br> :SF_URBAN_PHYSICS = 0 ;<br><br> :FEEDBACK = 1 ;<br><br> :SMOOTH_OPTION = 0 ;<br><br> :SWRAD_SCAT = 1.f ;<br><br> :W_DAMPING = 0 ;<br><br> :MOIST_ADV_OPT = 1 ;<br><br>
:SCALAR_ADV_OPT = 1 ;<br><br> :TKE_ADV_OPT = 1 ;<br><br> :DIFF_6TH_OPT = 0 ;<br><br> :DIFF_6TH_FACTOR = 0.12f ;<br><br> :OBS_NUDGE_OPT = 0 ;<br><br> :WEST-EAST_PATCH_START_UNSTAG = 1 ;<br><br> :WEST-EAST_PATCH_END_UNSTAG = 140 ;<br><br> :WEST-EAST_PATCH_START_STAG = 1 ;<br><br> :WEST-EAST_PATCH_END_STAG = 141 ;<br><br> :SOUTH-NORTH_PATCH_START_UNSTAG = 1 ;<br><br>
:SOUTH-NORTH_PATCH_END_UNSTAG = 140 ;<br><br> :SOUTH-NORTH_PATCH_START_STAG = 1 ;<br><br> :SOUTH-NORTH_PATCH_END_STAG = 141 ;<br><br> :BOTTOM-TOP_PATCH_START_UNSTAG = 1 ;<br><br> :BOTTOM-TOP_PATCH_END_UNSTAG = 29 ;<br><br> :BOTTOM-TOP_PATCH_START_STAG = 1 ;<br><br> :BOTTOM-TOP_PATCH_END_STAG = 30 ;<br><br> :GRID_ID = 2 ;<br><br> :PARENT_ID = 1 ;<br><br> :I_PARENT_START = 14 ;<br><br> :J_PARENT_START = 10
;<br><br> :PARENT_GRID_RATIO = 5 ;<br><br> :DT = 60.f ;<br><br> :CEN_LAT = 40.5046f ;<br><br> :CEN_LON = -3.839993f ;<br><br> :TRUELAT1 = 43.427f ;<br><br> :TRUELAT2 = 43.427f ;<br><br> :MOAD_CEN_LAT = 43.427f ;<br><br> :STAND_LON = -3.84f ;<br><br> :POLE_LAT = 90.f ;<br><br> :POLE_LON = 0.f ;<br><br> :GMT = 18.f ;<br><br>
:JULYR = 2007 ;<br><br> :JULDAY = 365 ;<br><br> :MAP_PROJ = 1 ;<br><br> :MMINLU = "" ;<br><br> :NUM_LAND_CAT = 24 ;<br><br> :ISWATER = 16 ;<br><br> :ISLAKE = 0 ;<br><br> :ISICE = 0 ;<br><br> :ISURBAN = 0 ;<br><br> :ISOILWATER = 0 ;<br><br>}<br><br> <br><br> <br><br> <br><br> <br><br> <br><br><br><br><br>Catherine Meissner<br>Software Development Manager<br><br><br> Fjordgaten 15 <br> N-3125 T?nsberg,
Norway<br><br> Switchboard +47 33 38 18 00<br><br> <<a href="http://www.windsim.com/" target="_blank">http://www.windsim.com/</a>> www.windsim.com <br><br>Email <br><br>Direct <br><br>Fax <br><br> <br><br> <mailto:<a ymailto="mailto:kristine@windsim.com" href="mailto:kristine@windsim.com">kristine@windsim.com</a>> <a ymailto="mailto:catherine@windsim.com" href="mailto:catherine@windsim.com">catherine@windsim.com</a><br><br>+47 33 38 18 06<br>+47 33 38 18 08<br><br>Upcoming WindSim events:<br><br> <br><br>Brazil WindPower 2011<br><br>August 31 ? 2, Rio de Janeiro, Brazil<br>Booth 141<br><br>VIND 2011<br><br>September 14 ? 15, Stockholm, Sweden<br><br> <br><br>EOLICA EXPO 2011<br><br>September 14 ? 16, Rome, Italy<br>Booth B8/C7<br><br> <br><br>GREEN EXPO 2011<br><br>September 27 ? 29, Mexico City, Mexico<br><br> <br><br>WIND POWER EXPO+<br><br>September 27 ? 29, Zaragoza,
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