L50 model level definitions

The following is the list of a(n) and b(n) coefficients defining the model levels, accompanied by the corresponding half-level, ph, and full-level, pf, values of pressure for a surface pressure of 1013.250 hPa. Also provided are the Geopotential and Geometric heights, the temperature and density of the level based on the 1976 version of the International Civil Aviation Organization (ICAO) Standard Atmosphere as described at:

 

 

 

 

 

n a [Pa] b ph [hPa] pf [hPa] Geopotential Altitude [m] Geometric Altitude [m] Temperature [K] Density [kg/m^3]
0 0.000000 0.000000 0.000000 - - - - -
1 20.006149 0.000000 0.2001 0.1000 64945.22 65614.30 231.60 0.000150
2 43.297810 0.000000 0.4330 0.3165 56755.32 57265.62 254.54 0.000433
3 75.346230 0.000000 0.7535 0.5932 51952.31 52379.57 267.98 0.000771
4 115.082146 0.000000 1.1508 0.9521 48208.63 48576.32 270.65 0.001226
5 161.897491 0.000000 1.6190 1.3849 45256.69 45580.57 265.77 0.001815
6 215.896912 0.000000 2.1590 1.8890 42872.31 43162.86 259.09 0.002540
7 278.005798 0.000000 2.7801 2.4695 40862.00 41125.85 253.46 0.003394
8 350.138184 0.000000 3.5014 3.1407 39095.61 39337.07 248.52 0.004403
9 435.562286 0.000000 4.3556 3.9285 37482.34 37704.24 244.00 0.005609
10 539.651489 0.000000 5.3965 4.8761 35952.59 36156.69 239.72 0.007086
11 668.615540 0.000000 6.6862 6.0413 34462.07 34649.56 235.54 0.008935
12 828.398987 0.000000 8.2840 7.4851 32997.50 33169.35 231.44 0.011266
13 1026.366943 0.000000 10.2637 9.2738 31558.00 31715.14 228.21 0.014157
14 1271.644531 0.000000 12.7164 11.4901 30131.02 30274.25 226.78 0.017650
15 1575.537842 0.000000 15.7554 14.2359 28712.97 28843.00 225.36 0.022006
16 1952.054443 0.000000 19.5205 17.6380 27303.79 27421.34 223.95 0.027436
17 2418.549805 0.000000 24.1855 21.8530 25903.41 26009.20 222.55 0.034206
18 2996.526611 0.000000 29.9653 27.0754 24511.80 24606.50 221.16 0.042648
19 3712.626221 0.000000 37.1263 33.5458 23128.88 23213.18 219.78 0.053172
20 4599.856934 0.000000 45.9986 41.5624 21754.62 21829.18 218.40 0.066293
21 5699.114746 0.000000 56.9911 51.4949 20388.94 20454.42 217.04 0.082653
22 6998.388184 0.000000 69.9839 63.4875 19061.11 19118.33 216.65 0.102085
23 8507.411133 0.000100 85.1758 77.5798 17789.81 17839.64 216.65 0.124744
24 10181.707031 0.000673 102.4987 93.8372 16583.26 16626.55 216.65 0.150885
25 11883.089844 0.003163 122.0362 112.2674 15446.03 15483.59 216.65 0.180520
26 13442.915039 0.009292 143.8446 132.9404 14374.16 14406.68 216.65 0.213761
27 14736.354492 0.020319 167.9519 155.8983 13363.90 13392.00 216.65 0.250676
28 15689.206055 0.036975 194.3568 181.1544 12411.70 12435.94 216.65 0.291287
29 16266.609375 0.059488 222.9419 208.6494 11515.57 11536.43 216.65 0.335497
30 16465.003906 0.087895 253.7096 238.3258 10670.87 10688.77 218.79 0.379468
31 16297.620117 0.122004 286.5964 270.1530 9858.42 9873.71 224.07 0.420006
32 15791.597656 0.161442 321.4966 304.0465 9074.42 9087.37 229.17 0.462189
33 14985.269531 0.205703 358.2815 339.8891 8318.89 8329.77 234.08 0.505834
34 13925.519531 0.254189 396.8118 377.5467 7591.68 7600.74 238.80 0.550756
35 12665.294922 0.306235 436.9459 416.8789 6892.36 6899.82 243.35 0.596773
36 11261.230469 0.361145 478.5425 457.7442 6220.25 6226.34 247.72 0.643717
37 9771.406250 0.418202 521.4575 500.0000 5574.58 5579.46 251.92 0.691426
38 8253.210938 0.476688 565.5364 543.4969 4954.56 4958.41 255.95 0.739742
39 6761.339844 0.535887 610.6005 588.0684 4359.59 4362.58 259.81 0.788493
40 5345.917969 0.595084 656.4283 633.5144 3789.43 3791.69 263.52 0.837482
41 4050.718750 0.653565 702.7315 679.5799 3244.36 3246.01 267.06 0.886460
42 2911.570312 0.710594 749.1255 725.9285 2725.33 2726.50 270.44 0.935106
43 1954.804688 0.765405 795.0949 772.1102 2234.22 2235.00 273.63 0.982992
44 1195.890625 0.817167 839.9534 817.5241 1773.95 1774.44 276.62 1.029552
45 638.148438 0.864956 882.7980 861.3757 1348.75 1349.04 279.38 1.074046
46 271.625000 0.907716 922.4593 902.6287 964.47 964.62 281.88 1.115511
47 72.062500 0.944213 957.4447 939.9520 628.86 628.92 284.06 1.152716
48 0.000000 0.972985 985.8773 971.6610 352.11 352.13 285.86 1.184104
49 0.000000 0.992281 1005.4292 995.6532 147.52 147.53 287.19 1.207723
50 0.000000 1.000000 1013.2500 1009.3396 32.60 32.60 287.94 1.221149

A description of how model levels should be interpreted is available here.