ASAR WRF data structure
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WRF Output, Structure Data File (simulation wiht one domine)
File Dimensions:
1 TIMES: "string time" [19 265]
3 ZNU: "eta values on half (mass) levels" ; [34 265]
4 ZNW: "eta values on full (w) levels" ; [35 265]
5 ZS: "DEPTHS OF CENTERS OF SOIL LAYERS" ; [10 265]
44 XTIME: "minutes since simulation start" [265]
103 XLAT: "LATITUDE, SOUTH IS NEGATIVE"
104 XLONG: "LONGITUDE, WEST IS NEGATIVE"
105 XLAT_U: "LATITUDE, SOUTH IS NEGATIVE"
106 XLONG_U: "LONGITUDE, WEST IS NEGATIVE"
107 XLAT_V: "LATITUDE, SOUTH IS NEGATIVE"
108 XLONG_V: "LONGITUDE, WEST IS NEGATIVE"
Four dimensions Variables (longitude, latitude, level, time [280 287 34 265])
12 T: "perturbation potential temperature (theta-t0)" ; [280 287 34 265]
16 P: "perturbation pressure" ; [280 287 34 265]
7 U: "x-wind component" ; [281 287 34 265]
8 V: "y-wind component" ; [280 288 34 265]
9 W: "z-wind component" ; [280 287 35 265]
45 QVAPOR: "Water vapor mixing ratio" ; [280 287 34 265]
46 QCLOUD: "Cloud water mixing ratio" ; [280 287 34 265]
47 QRAIN: "Rain water mixing ratio" ; [280 287 34 265]
48 QICE: "Ice mixing ratio" ; [280 287 34 265]
49 QSNOW: "Snow mixing ratio" ; [280 287 34 265]
50 QGRAUP: "Graupel mixing ratio" ; [280 287 34 265]
72 QNDROPSOURCE:"Droplet number source" ; [280 287 34 265]
10 PH: "perturbation geopotential" ; [280 287 35 265]
11 PHB: "base-state geopotential" ; [280 287 35 265]
17 PB: "BASE STATE PRESSURE" ; [280 287 34 265]
52 TSLB: "SOIL TEMPERATURE" ; [280 287 10 265]
56 T2M_MAX: "MAX TEMPERATURE AT 2 M" ; [280 287 10 265]
57 T2M_MIN: "MIN TEMPERATURE AT 2 M" ; [280 287 10 265]
58 SMOIS: "SOIL MOISTURE" ; [280 287 10 265]
Three dimensions variables (longitude, latitude, time [280 287 265])
87 HGT: "Terrain Height" ;
88 HGT_SHAD: "Height of orographic shadow" ;
89 TSK: "SURFACE SKIN TEMPERATURE" ;
93 RAINC: "ACCUMULATED TOTAL CUMULUS PRECIPITATION" ;
94 RAINNC: "ACCUMULATED TOTAL GRID SCALE PRECIPITATION" ;
95 PRATEC: "PRECIP RATE FROM CUMULUS SCHEME" ;
96 RAINCV: "TIME-STEP CUMULUS PRECIPITATION" ;
31 T2: "TEMP at 2 M" ;
34 U10: "U at 10 M" ;
35 V10: "V at 10 M" ;
71 SST: "SEA SURFACE TEMPERATURE" ;
2 LU_INDEX: "LAND USE CATEGORY" ;
13 MU: "perturbation dry air mass in column" ;
14 MUB: "base state dry air mass in column" ;
15 NEST_POS: "-" ;
18 SR: "fraction of frozen precipitation" ;
19 POTEVP: "accumulated potential evaporation" ;
20 SNOPCX: "snow phase change heat flux" ;
21 SOILTB: "bottom soil temperature" ;
30 Q2: "QV at 2 M" ;
32 TH2: "POT TEMP at 2 M" ;
33 PSFC: "SFC PRESSURE" ;
51 LANDMASK: "LAND MASK (1 FOR LAND, 0 FOR WATER)" ;
53 SABV: "NET VEGETATION SOLAR RADIATION" ;
54 SABG: "NET SOIL SOLAR RADIATION" ;
55 LWUP: "OUTGOING LONGWAVE RADIATION" ;
59 SEAICE: "SEA ICE FLAG" ;
60 XICEM: "SEA ICE FLAG (PREVIOUS STEP)" ;
61 SFROFF: "SURFACE RUNOFF" ;
62 UDROFF: "UNDERGROUND RUNOFF" ;
63 IVGTYP: "DOMINANT VEGETATION CATEGORY" ;
64 ISLTYP: "DOMINANT SOIL CATEGORY" ;
65 VEGFRA: "VEGETATION FRACTION" ;
66 GRDFLX: "GROUND HEAT FLUX" ;
67 SNOW: "SNOW WATER EQUIVALENT" ;
68 SNOWH: "PHYSICAL SNOW DEPTH" ;
69 RHOSN: "SNOW DENSITY" ;
70 CANWAT: "CANOPY WATER" ;
73 MAPFAC_M: "Map scale factor on mass grid" ;
74 MAPFAC_U: "Map scale factor on u-grid" ;
75 MAPFAC_V: "Map scale factor on v-grid" ;
76 MAPFAC_MX: "Map scale factor on mass grid, x direction" ;
77 MAPFAC_MY: "Map scale factor on mass grid, y direction" ;
78 MAPFAC_UX: "Map scale factor on u-grid, x direction" ;
79 MAPFAC_UY: "Map scale factor on u-grid, y direction" ;
80 MAPFAC_VX: "Map scale factor on v-grid, x direction" ;
81 MF_VX_INV: "Inverse map scale factor on v-grid, x direction" ;
82 MAPFAC_VY: "Map scale factor on v-grid, y direction" ;
83 F: "Coriolis sine latitude term" ;
84 E: "Coriolis cosine latitude term" ;
85 SINALPHA: "Local sine of map rotation" ;
86 COSALPHA: "Local cosine of map rotation" ;
97 SNOWNC: "ACCUMULATED TOTAL GRID SCALE SNOW AND ICE" ;
98 GRAUPELNC: "ACCUMULATED TOTAL GRID SCALE GRAUPEL" ;
99 EDT_OUT: "EDT FROM GD SCHEME" ;
100 SWDOWN: "DOWNWARD SHORT WAVE FLUX AT GROUND SURFACE" ;
101 GLW: "DOWNWARD LONG WAVE FLUX AT GROUND SURFACE" ;
102 OLR: "TOA OUTGOING LONG WAVE" ;
103 XLAT: "LATITUDE, SOUTH IS NEGATIVE" ;
104 XLONG: "LONGITUDE, WEST IS NEGATIVE" ;
105 XLAT_U: "LATITUDE, SOUTH IS NEGATIVE" ;
106 XLONG_U: "LONGITUDE, WEST IS NEGATIVE" ;
107 XLAT_V: "LATITUDE, SOUTH IS NEGATIVE" ;
108 XLONG_V: "LONGITUDE, WEST IS NEGATIVE" ;
109 ALBEDO: "ALBEDO" ;
110 ALBBCK: "BACKGROUND ALBEDO" ;
111 EMISS: "SURFACE EMISSIVITY" ;
112 TMN: "SOIL TEMPERATURE AT LOWER BOUNDARY" ;
113 XLAND: "LAND MASK (1 FOR LAND, 2 FOR WATER)" ;
114 ZNT: "TIME-VARYING ROUGHNESS LENGTH" ;
115 UST: "U* IN SIMILARITY THEORY" ;
116 PBLH: "PBL HEIGHT" ;
117 HFX: "UPWARD HEAT FLUX AT THE SURFACE" ;
118 QFX: "UPWARD MOISTURE FLUX AT THE SURFACE" ;
119 LH: "LATENT HEAT FLUX AT THE SURFACE" ;
120 SNOWC: "FLAG INDICATING SNOW COVERAGE (1 FOR SNOW COVER)" ;
Two dimensions Variables (Level, time)
3 ZNU: "eta values on half (mass) levels" ; [34 265]
4 ZNW: "eta values on full (w) levels" ; [35 265]
5 ZS: "DEPTHS OF CENTERS OF SOIL LAYERS" ; [10 265]
6 DZS: "THICKNESSES OF SOIL LAYERS" ; [10 265]
22 FNM: "upper weight for vertical stretching" ; [34 265]
23 FNP: "lower weight for vertical stretching" ; [34 265]
24 RDNW: "inverse d(eta) values between full (w) levels" ; [34 265]
25 RDN: "inverse d(eta) values between half (mass) levels" ; [34 265]
26 DNW: "d(eta) values between full (w) levels" ; [34 265]
27 DN: "d(eta) values between half (mass) levels" ; [34 265]
One dimension variables (time)
28 CFN: "extrapolation constant" ; [265] 29 CFN1: "extrapolation constant" ; [265] 36 RDX: "INVERSE X GRID LENGTH" ; [265] 37 RDY: "INVERSE Y GRID LENGTH" ; [265] 38 RESM: "TIME WEIGHT CONSTANT FOR SMALL STEPS" ; [265] 39 ZETATOP: "ZETA AT MODEL TOP" ; [265] 40 CF1: "2nd order extrapolation constant" ; [265] 41 CF2: "2nd order extrapolation constant" ; [265] 42 CF3: "2nd order extrapolation constant" ; [265] 43 ITIMESTEP: "" ; [265] 44 XTIME: "minutes since simulation start" ; [265] 90 P_TOP: "PRESSURE TOP OF THE MODEL" ; [265] 91 MAX_MSTFX: "Max map factor in domain" ; [265] 92 MAX_MSTFY: "Max map factor in domain" ; [265]
Commands using in bash
ncdump -h wrfout
Command using in matlab
ncdisp('wrfout')
ncdisp('wrfout', variable)
xlat = ncread('wrfout', 'XLAT');
P = ncread('wrfout', 'P', [50 50 1 10], [100 100 1 1]);
xlat(1, :, 1)
Extract data and produce a file per each level (matlab commands)
for i=1:265
T = ncread('wrfout', 'T', [1 1 1 i], [280 287 34 1]);
str = ['T' int2str(i) '.dat'];
pf = fopen(str, 'wb');
fwrite(pf, T, 'single');
fclose(pf);
end
Dump latitude values (matlab command)
Latitudes XLAT (-8.5430, 16.9694) 287 lats = ncread('wrfout', 'XLAT', [1 1 1], [1 287 1])
-8.5430 -4.8707 -1.1782 2.5192 6.2062 9.8675 13.4886 -8.4538 -4.7808 -1.0880 2.6093 6.2958 9.9564 13.5763 -8.3646 -4.6909 -0.9978 2.6994 6.3855 10.0452 13.6640 -8.2753 -4.6010 -0.9076 2.7896 6.4751 10.1340 13.7516 -8.1861 -4.5111 -0.8174 2.8796 6.5647 10.2228 13.8392 -8.0968 -4.4212 -0.7272 2.9697 6.6543 10.3115 13.9268 -8.0075 -4.3312 -0.6370 3.0598 6.7439 10.4003 14.0143 -7.9181 -4.2413 -0.5468 3.1499 6.8335 10.4890 14.1018 -7.8288 -4.1513 -0.4566 3.2399 6.9231 10.5777 14.1893 -7.7394 -4.0613 -0.3664 3.3300 7.0126 10.6663 14.2767 -7.6500 -3.9714 -0.2762 3.4200 7.1021 10.7550 14.3641 -7.5606 -3.8814 -0.1860 3.5101 7.1916 10.8436 14.4515 -7.4712 -3.7914 -0.0958 3.6001 7.2811 10.9321 14.5388 -7.3817 -3.7014 -0.0056 3.6901 7.3706 11.0207 14.6261 -7.2923 -3.6113 0.0846 3.7801 7.4600 11.1092 14.7134 -7.2028 -3.5213 0.1748 3.8701 7.5494 11.1977 14.8006 -7.1133 -3.4313 0.2650 3.9601 7.6389 11.2862 14.8878 -7.0238 -3.3412 0.3552 4.0501 7.7282 11.3746 14.9749 -6.9342 -3.2512 0.4454 4.1401 7.8176 11.4631 15.0621 -6.8447 -3.1611 0.5356 4.2300 7.9070 11.5514 15.1492 -6.7551 -3.0710 0.6258 4.3200 7.9963 11.6398 15.2362 -6.6655 -2.9810 0.7160 4.4099 8.0856 11.7281 15.3232 -6.5759 -2.8909 0.8062 4.4999 8.1749 11.8164 15.4102 -6.4863 -2.8008 0.8964 4.5898 8.2642 11.9047 15.4971 -6.3967 -2.7107 0.9865 4.6797 8.3535 11.9930 15.5840 -6.3070 -2.6206 1.0767 4.7696 8.4427 12.0812 15.6709 -6.2174 -2.5305 1.1669 4.8595 8.5319 12.1694 15.7577 -6.1277 -2.4404 1.2571 4.9493 8.6211 12.2575 15.8445 -6.0380 -2.3502 1.3473 5.0392 8.7103 12.3457 15.9313 -5.9483 -2.2601 1.4375 5.1291 8.7994 12.4338 16.0180 -5.8586 -2.1700 1.5276 5.2189 8.8885 12.5218 16.1047 -5.7688 -2.0798 1.6178 5.3087 8.9777 12.6099 16.1913 -5.6791 -1.9897 1.7080 5.3985 9.0667 12.6979 16.2779 -5.5893 -1.8995 1.7981 5.4883 9.1558 12.7859 16.3645 -5.4995 -1.8094 1.8883 5.5781 9.2449 12.8738 16.4510 -5.4097 -1.7192 1.9784 5.6679 9.3339 12.9617 16.5375 -5.3199 -1.6291 2.0686 5.7576 9.4229 13.0496 16.6240 -5.2301 -1.5389 2.1587 5.8474 9.5118 13.1375 16.7104 -5.1403 -1.4487 2.2489 5.9371 9.6008 13.2253 16.7968 -5.0504 -1.3585 2.3390 6.0268 9.6897 13.3131 16.8831 -4.9606 -1.2684 2.4291 6.1165 9.7786 13.4009 16.9694
Dump longitude values (matlab command)
Longitudes XLONG (-86.4603, -61.2937) 280 lons = ncread('wrfout', 'XLONG', [1 1 1], [280 1 1])
-86.4603 -83.9346 -81.4089 -78.8832 -76.3576 -73.8319 -71.3062 -68.7806 -66.2549 -63.7292 -86.3701 -83.8444 -81.3187 -78.7930 -76.2674 -73.7417 -71.2160 -68.6904 -66.1647 -63.6390 -86.2798 -83.7542 -81.2285 -78.7028 -76.1772 -73.6515 -71.1258 -68.6002 -66.0745 -63.5488 -86.1896 -83.6640 -81.1383 -78.6126 -76.0870 -73.5613 -71.0356 -68.5099 -65.9843 -63.4586 -86.0994 -83.5738 -81.0481 -78.5224 -75.9968 -73.4711 -70.9454 -68.4197 -65.8941 -63.3684 -86.0092 -83.4836 -80.9579 -78.4322 -75.9066 -73.3809 -70.8552 -68.3295 -65.8039 -63.2782 -85.9190 -83.3934 -80.8677 -78.3420 -75.8164 -73.2907 -70.7650 -68.2393 -65.7137 -63.1880 -85.8288 -83.3032 -80.7775 -78.2518 -75.7262 -73.2005 -70.6748 -68.1491 -65.6235 -63.0978 -85.7386 -83.2130 -80.6873 -78.1616 -75.6359 -73.1103 -70.5846 -68.0589 -65.5333 -63.0076 -85.6484 -83.1228 -80.5971 -78.0714 -75.5457 -73.0201 -70.4944 -67.9687 -65.4431 -62.9174 -85.5582 -83.0326 -80.5069 -77.9812 -75.4555 -72.9299 -70.4042 -67.8785 -65.3529 -62.8272 -85.4680 -82.9424 -80.4167 -77.8910 -75.3653 -72.8397 -70.3140 -67.7883 -65.2627 -62.7370 -85.3778 -82.8521 -80.3265 -77.8008 -75.2751 -72.7495 -70.2238 -67.6981 -65.1725 -62.6468 -85.2876 -82.7619 -80.2363 -77.7106 -75.1849 -72.6593 -70.1336 -67.6079 -65.0823 -62.5566 -85.1974 -82.6717 -80.1461 -77.6204 -75.0947 -72.5691 -70.0434 -67.5177 -64.9921 -62.4664 -85.1072 -82.5815 -80.0559 -77.5302 -75.0045 -72.4789 -69.9532 -67.4275 -64.9018 -62.3762 -85.0170 -82.4913 -79.9657 -77.4400 -74.9143 -72.3887 -69.8630 -67.3373 -64.8116 -62.2860 -84.9268 -82.4011 -79.8755 -77.3498 -74.8241 -72.2985 -69.7728 -67.2471 -64.7214 -62.1958 -84.8366 -82.3109 -79.7853 -77.2596 -74.7339 -72.2083 -69.6826 -67.1569 -64.6312 -62.1056 -84.7464 -82.2207 -79.6951 -77.1694 -74.6437 -72.1180 -69.5924 -67.0667 -64.5410 -62.0154 -84.6562 -82.1305 -79.6049 -77.0792 -74.5535 -72.0278 -69.5022 -66.9765 -64.4508 -61.9252 -84.5660 -82.0403 -79.5147 -76.9890 -74.4633 -71.9376 -69.4120 -66.8863 -64.3606 -61.8350 -84.4758 -81.9501 -79.4245 -76.8988 -74.3731 -71.8474 -69.3218 -66.7961 -64.2704 -61.7448 -84.3856 -81.8599 -79.3343 -76.8086 -74.2829 -71.7572 -69.2316 -66.7059 -64.1802 -61.6546 -84.2954 -81.7697 -79.2440 -76.7184 -74.1927 -71.6670 -69.1414 -66.6157 -64.0900 -61.5644 -84.2052 -81.6795 -79.1538 -76.6282 -74.1025 -71.5768 -69.0512 -66.5255 -63.9998 -61.4741 -84.1150 -81.5893 -79.0636 -76.5380 -74.0123 -71.4866 -68.9610 -66.4353 -63.9096 -61.3839 -84.0248 -81.4991 -78.9734 -76.4478 -73.9221 -71.3964 -68.8708 -66.3451 -63.8194 -61.2937
Presion level values, geo-potential height (matlab command)
Presion Levels ZNU (0.9965, 0.065) 34 levs = ncread('wrfout', 'ZNU', [1 1], [34 1])
0.9965 0.3980 0.9880 0.3555 0.9765 0.3165 0.9620 0.2805 0.9440 0.2470 0.9215 0.2165 0.8945 0.1885 0.8625 0.1625 0.8260 0.1385 0.7860 0.1165 0.7420 0.0970 0.6955 0.0790 0.6470 0.0625 0.5965 0.0475 0.5455 0.0330 0.4940 0.0195 0.4440 0.0065
WRF Calculate "standar" variables
Temperature (°K): [ref:http://gradsusr.org/pipermail/gradsusr/2011-December/014869.html]
