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-----
12.0000400.0000000.02000.010079302.7480302.61198.040.000018
23.9808320.0000000.03980.029972744.4873584.94211.160.000049
37.3871860.0000000.07390.056868689.8369438.73221.120.000090
412.9083190.0000000.12910.101564847.8165514.87231.880.000152
521.4136120.0000000.21410.171661203.8761797.72242.080.000247
633.9528580.0000000.33950.276857748.0658276.46251.760.000383
751.7466010.0000000.51750.428554470.2454940.11260.930.000572
876.1676560.0000000.76170.639651360.3351777.87269.640.000826
9108.7155610.0000001.08720.924448442.7548814.03270.650.001190
10150.9860230.0000001.50991.298545759.1046090.25267.180.001693
11204.6374510.0000002.04641.778143332.1243628.96260.380.002379
12271.3565060.0000002.71362.380041136.4441403.86254.230.003261
13352.8244930.0000003.52823.120939141.6639383.70248.650.004372
14450.6857910.0000004.50694.017637322.4037542.40243.550.005746
15566.5192260.0000005.66525.086035657.2835858.04238.890.007417
16701.8133540.0000007.01816.341734128.2234312.09234.610.009416
17857.9458010.0000008.57957.798832719.8032888.77230.670.011778
181036.1665040.00000010.36179.470631417.8131573.56228.070.014466
191237.5854490.00000012.375911.368830201.4930345.38226.850.017458
201463.1639400.00000014.631613.503729061.5629194.77225.710.020842
211713.7095950.00000017.137115.884427991.3328114.89224.640.024633
221989.8743900.00000019.898718.517926984.8527099.67223.630.028846
232292.1555180.00000022.921621.410126036.8426143.71222.690.033493
242620.8984380.00000026.209024.565325142.5525242.19221.790.038584
252976.3022460.00000029.763027.986024297.7524390.80220.950.044125
263358.4257810.00000033.584331.673623498.6423585.66220.150.050120
273767.1960450.00000037.672035.628122741.7822823.27219.390.056572
284202.4165040.00000042.024239.848122024.0822100.50218.670.063480
294663.7763670.00000046.637844.331021342.7321414.49217.990.070843
305150.8598630.00000051.508649.073220695.1920762.65217.350.078655
315663.1562500.00000056.631654.070120079.1320142.64216.730.086910
326199.8393550.00000061.998459.315019492.2419552.08216.650.095375
336759.7270510.00000067.597364.797818931.5618988.00216.650.104191
347341.4697270.00000073.415070.506118396.1418449.43216.650.113370
357942.9262700.00001479.443476.429217884.5817934.94216.650.122894
368564.6240230.00005585.701682.572517394.2817441.91216.650.132772
379208.3056640.00013192.216288.958916921.8316966.91216.650.143041
389873.5605470.00027999.018295.617216464.0916506.76216.650.153747
3910558.8818360.000548106.1445102.581316018.2416058.63216.650.164945
4011262.4843750.001000113.6382109.891315581.7015619.91216.650.176699
4111982.6621090.001701121.5502117.594215152.0515188.19216.650.189085
4212713.8974610.002765129.9403125.745314727.0414761.17216.650.202192
4313453.2255860.004267138.8558134.398114305.0014337.21216.650.216105
4414192.0097660.006322148.3260143.590913885.4213915.75216.650.230887
4514922.6855470.009035158.3816153.353813468.2613496.80216.650.246585
4615638.0537110.012508169.0545163.718013053.5213080.33216.650.263250
4716329.5605470.016860180.3786174.716612641.1812666.32216.650.280935
4816990.6230470.022189192.3889186.383712231.2312254.76216.650.299695
4917613.2812500.028610205.1222198.755611823.6511845.64216.650.319588
5018191.0292970.036227218.6172211.869711418.4411438.95216.650.340675
5118716.9687500.045146232.9140225.765611015.5711034.66216.650.363019
5219184.5449220.055474248.0547240.484410613.0710630.79219.170.382249
5319587.5136720.067316264.0833256.069010207.8210224.21221.800.402186
5419919.7968750.080777281.0456272.56449800.099815.19224.450.423040
5520175.3945310.095964298.9895290.01759389.899403.75227.120.444844
5620348.9160160.112979317.9651308.47738977.238989.90229.800.467635
5720434.1582030.131935338.0245327.99488562.148573.66232.500.491453
5820426.2187500.152934359.2221348.62338144.618155.04235.210.516334
5920319.0117190.176091381.6144370.41827724.687734.06237.940.542320
6020107.0312500.201520405.2606393.43757302.357310.73240.680.569453
6119785.3574220.229315430.2069417.73376877.766885.19243.440.597764
6219348.7753910.259554456.4813443.34416451.336457.87246.220.627270
6318798.8222660.291993483.8505470.16596025.616031.31248.980.657826
6418141.2968750.326329512.0662497.95845604.745609.68251.720.689139
6517385.5957030.362203540.8577526.46205192.425196.66254.400.720911
6616544.5859380.399205569.9401555.39894791.934795.53257.000.752832
6715633.5664060.436906599.0310584.48554406.044409.09259.510.784601
6814665.6455080.475016627.9668613.49894036.324038.88261.910.815991
6913653.2197270.513280656.6129642.28993683.173685.30264.210.846863
7012608.3837890.551458684.8491670.73103346.693348.45266.400.877102
7111543.1669920.589317712.5573698.70323026.843028.28268.480.906605
7210471.3105470.626559739.5739726.06562723.842725.01270.450.935249
739405.2226560.662934765.7697752.67182437.962438.89272.300.962904
748356.2529300.698224791.0376778.40362169.152169.89274.050.989474
757335.1645510.732224815.2774803.15751917.261917.84275.691.014877
766353.9208980.764679838.3507826.81411682.351682.80277.211.039015
775422.8027340.795385860.1516849.25121464.531464.87278.631.061788
784550.2158200.824185880.6080870.37981263.631263.88279.941.083128
793743.4643550.850950899.6602890.13411079.331079.52281.131.102991
803010.1469730.875518917.2205908.4403911.48911.61282.231.121323
812356.2026370.897767933.2247925.2226759.99760.08283.211.138067
821784.8546140.917651947.6584940.4415624.53624.59284.091.153202
831297.6561280.935157960.5245954.0914504.53504.57284.871.166736
84895.1935420.950274971.8169966.1707399.50399.52285.551.178683
85576.3141480.963007981.5301976.6735309.03309.04286.141.189047
86336.7723690.973466989.7322985.6311232.49232.50286.641.197870
87162.0434270.982238996.8732993.3027167.39167.39287.061.205414
8854.2083360.9891531002.8013999.8373112.26112.26287.421.211831
896.5756280.9942041007.44311005.122267.8867.88287.711.217015
900.0031600.9976301010.84871009.145934.2234.22287.931.220959
910.0000001.0000001013.25001012.049410.0010.00288.091.223803

Click on the Export link to save this table as a CSV file.


Export..