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]
00.0000000.0000000.000000-----
12000.0000000.00000020.000010.000031054.9531207.11227.700.015299
24000.0000000.00000040.000030.000023848.7523938.39220.500.047396
36000.0000000.00000060.000050.000020576.1820642.87217.230.080184
48000.0000000.00000080.000070.000018441.8318495.38216.650.112556
59988.8828380.000197100.088690.044316844.9216889.59216.650.144786
611914.5244690.001511120.6766110.382615553.4115591.49216.650.177489
713722.9429420.004884142.1783131.427414446.7514479.60216.650.211328
815369.7308560.011076164.9202153.549313460.1813488.69216.650.246899
916819.4762690.020678189.1466177.033412557.6312582.44216.650.284660
1018045.1835870.034121215.0251202.085911718.2711739.87216.650.324943
1119027.6944760.051690242.6522228.838710930.0210948.81217.100.367189
1219755.1087570.073534272.0592257.355710175.2610191.54222.010.403822
1320222.2053090.099675303.2174287.63839444.619458.63226.760.441886
1420429.8629670.130023336.0439319.63078737.518749.51231.360.481280
1520384.4814280.164384370.4072353.22568054.208064.40235.800.521847
1620097.4021470.202476406.1328388.27007395.387403.97240.080.563389
1719584.3292430.243933443.0085424.57076761.896769.08244.200.605674
1818864.7503930.288323480.7907461.89966154.676160.62248.140.648445
1917961.3577410.335155519.2093500.00005574.585579.46251.920.691426
2016899.4687940.383892557.9734538.59135022.435026.39255.500.734331
2115706.4473210.433963596.7774577.37544498.914502.09258.910.776863
2214411.1242610.484772635.3061616.04174004.594007.11262.120.818729
2313043.2186180.535710673.2403654.27323539.963541.93265.140.859634
2411632.7583640.586168710.2627691.75153105.353106.86267.970.899295
2510209.5013400.635547746.0635728.16312701.002702.14270.590.937436
268802.3561550.683269780.3455763.20452327.042327.89273.020.973801
277438.8030920.728786812.8302796.58791983.491984.11275.261.008150
286144.3150030.771597843.2634828.04681670.261670.70277.291.040269
294941.7782130.811253871.4203857.34191387.121387.43279.131.069971
303850.9134220.847375897.1117884.26601133.731133.93280.781.097099
312887.6966030.879657920.1893908.6505909.57909.70282.241.121533
322063.7799050.907884940.5512930.3702713.97714.05283.511.143192
331385.9125530.931940958.1476949.3494546.06546.11284.601.162039
34855.3617500.951822972.9868965.5672404.72404.74285.521.178087
35467.3335770.967645985.1399979.0633288.55288.57286.271.191403
36210.3938940.979663994.7472989.9435195.85195.85286.881.202112
3765.8892430.9882701002.0236998.3854124.48124.48287.341.210406
387.3677430.9940191007.26391004.643771.8971.89287.681.216546
390.0000000.9976301010.84871009.056334.9734.97287.921.220871
400.0000001.0000001013.25001012.049310.0010.00288.091.223803

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