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]
00.0000000.0000000.0000




15000.0000000.00000050.000025.000025028.6925127.43221.680.039287
29890.5195310.001721100.648875.324417976.9218027.80216.650.121118
314166.3046880.013198155.0355127.842114622.1614655.80216.650.205563
417346.0664060.042217216.2372185.636412256.7112280.34216.650.298493
519121.1523440.093762286.2155251.226310331.5510348.34220.990.396016
619371.2500000.169571365.5307325.87318606.288617.92232.210.488877
718164.4726560.268016453.2116409.37117021.597029.34242.510.588056
815742.1835940.384274546.7880499.99985574.585579.47251.920.691426
912488.0507810.510831642.4799594.63394275.064277.93260.360.795614
108881.8242190.638268735.5438689.01183136.463138.01267.760.896409
115437.5390630.756385820.7823778.16312171.632172.37274.030.989227
122626.2578130.855613893.2122856.99731390.411390.71279.111.069623
13783.2966310.928746948.8851921.0486797.46797.56282.971.133908
140.0000000.972985985.8773967.3812389.03389.05285.621.179879
150.0000000.9922821005.4296995.6535147.52147.53287.191.207724
160.0000001.0000001013.25001009.339832.6032.60287.941.221149

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