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:

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

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

Space shortcuts

Page tree