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:

For a description of how model levels should be interpreted see IFS Documentation Part III - Chapter 2, Section 2.2.1.

na [Pa]bph [hPa]pf [hPa]Geopotential Altitude [m]Geometric Altitude [m]Temperature [K]Density [kg/m^3]
12000.0000000.00000020.000010.000031054.9531207.11227.700.015299
24000.0000000.00000040.000030.000023848.7523938.39220.500.047396
36046.1105950.00033960.804650.402320525.2320591.59217.180.080848
48267.9275600.00335786.080973.442818137.3518189.15216.650.118092
510609.5132320.013070119.3384102.709616010.3116050.66216.650.165152
612851.1001690.034077163.0397141.189013992.4014023.20216.650.227024
714698.4980860.070650218.5709190.805312082.5412105.50216.650.306805
815861.1251800.125917286.1963252.383610301.8110318.50221.190.397493
916116.2366100.201195365.0236325.61008611.778623.43232.170.488557
1015356.9241150.295520453.0045409.01417027.787035.55242.470.587640
1113621.4604030.405409546.9955500.00005574.585579.46251.920.691426
1211101.5619870.524932642.9032594.94934271.024273.89260.390.795955
138127.1441550.646108735.9403689.42183131.803133.34267.790.896841
145125.1417470.759698821.0158778.47812168.382169.12274.060.989551
152549.9694110.856438893.2850857.15041388.951389.25279.121.069778
16783.1950320.928747948.8848921.0849797.13797.23282.971.133944
170.0000000.972985985.8772967.3810389.03389.05285.621.179878
180.0000000.9922811005.4292995.6532147.52147.53287.191.207723
190.0000001.0000001013.25001009.339632.6032.60287.941.221149

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