Ocean Model Levels¶
The following tables describe the depth information associated with each ocean model level index for the Climate DT ocean models.
Note
As the level count varies by model (ICON: 72, FESOM: 69, NEMO: 75), the Climate DT Explorer uses levels 1–75 (NEMO max) across all models. Out-of-range levels (e.g. levels 73–75 for ICON, or 70–75 for FESOM) return NaN. See the daily ocean example notebook.
ICON¶
ICON’s ocean component uses 72 vertical levels, reaching a maximum depth of 5950.8 m.
Level |
Depth top (m) |
Depth bottom (m) |
|---|---|---|
1 |
0 |
2 |
2 |
2 |
4.2 |
3 |
4.2 |
6.7 |
4 |
6.7 |
9.5 |
5 |
9.5 |
12.6 |
6 |
12.6 |
16.1 |
7 |
16.1 |
20 |
8 |
20 |
24.4 |
9 |
24.4 |
29.3 |
10 |
29.3 |
34.7 |
11 |
34.7 |
40.6 |
12 |
40.6 |
47 |
13 |
47 |
54.1 |
14 |
54.1 |
61.8 |
15 |
61.8 |
70.2 |
16 |
70.2 |
79.4 |
17 |
79.4 |
89.5 |
18 |
89.5 |
100.5 |
19 |
100.5 |
112.5 |
20 |
112.5 |
125.7 |
21 |
125.7 |
140.1 |
22 |
140.1 |
155.8 |
23 |
155.8 |
172.9 |
24 |
172.9 |
191.6 |
25 |
191.6 |
212 |
26 |
212 |
234.3 |
27 |
234.3 |
258.6 |
28 |
258.6 |
285.1 |
29 |
285.1 |
314 |
30 |
314 |
345.5 |
31 |
345.5 |
379.8 |
32 |
379.8 |
417.1 |
33 |
417.1 |
457.7 |
34 |
457.7 |
500.8 |
35 |
500.8 |
546.1 |
36 |
546.1 |
592.9 |
37 |
592.9 |
641.3 |
38 |
641.3 |
691.3 |
39 |
691.3 |
743 |
40 |
743 |
796.4 |
41 |
796.4 |
851.6 |
42 |
851.6 |
908.6 |
43 |
908.6 |
967.5 |
44 |
967.5 |
1028.3 |
45 |
1028.3 |
1091.2 |
46 |
1091.2 |
1157.8 |
47 |
1157.8 |
1230.4 |
48 |
1230.4 |
1311 |
49 |
1311 |
1401.6 |
50 |
1401.6 |
1501.8 |
51 |
1501.8 |
1611.8 |
52 |
1611.8 |
1732.1 |
53 |
1732.1 |
1860.8 |
54 |
1860.8 |
1998.2 |
55 |
1998.2 |
2144.6 |
56 |
2144.6 |
2300.3 |
57 |
2300.3 |
2465.5 |
58 |
2465.5 |
2640.3 |
59 |
2640.3 |
2824.7 |
60 |
2824.7 |
3018.8 |
61 |
3018.8 |
3222.4 |
62 |
3222.4 |
3435.3 |
63 |
3435.3 |
3657.2 |
64 |
3657.2 |
3887.7 |
65 |
3887.7 |
4126.2 |
66 |
4126.2 |
4372.1 |
67 |
4372.1 |
4624.5 |
68 |
4624.5 |
4882.6 |
69 |
4882.6 |
5145.4 |
70 |
5145.4 |
5411.8 |
71 |
5411.8 |
5680.7 |
72 |
5680.7 |
5950.8 |
IFS-NEMO¶
IFS-NEMO’s ocean component (NEMO) uses 75 vertical levels, reaching a maximum depth of approximately 6004 m. Two technical details are relevant when working with these levels:
Partial cells: NEMO uses partial cells at the bottom. The deepest wet cell on each column is thinner than the single-dimensional bounds prescribe, as it is cut at the bathymetry depth.
Nonlinear free surface: The effective depth of the vertical levels varies at each time step in response to sea-surface height variations. However, the total variation is of the order of one metre distributed across the full column, so treating outputs as effectively at the specified depth is a reasonable assumption for most diagnostics.
Level |
Depth top (m) |
Depth middle (m) |
Depth bottom (m) |
|---|---|---|---|
1 |
0.0000 |
0.50576 |
1.0115 |
2 |
1.0115 |
1.555855 |
2.1002 |
3 |
2.1002 |
2.667682 |
3.2352 |
4 |
3.2352 |
3.85628 |
4.4774 |
5 |
4.4774 |
5.140361 |
5.8033 |
6 |
5.8033 |
6.543034 |
7.2827 |
7 |
7.2827 |
8.092519 |
8.9023 |
8 |
8.9023 |
9.82275 |
10.7432 |
9 |
10.7432 |
11.77368 |
12.8042 |
10 |
12.8042 |
13.99104 |
15.1779 |
11 |
15.1779 |
16.52532 |
17.8727 |
12 |
17.8727 |
19.4298 |
20.9869 |
13 |
20.9869 |
22.75762 |
24.5284 |
14 |
24.5284 |
26.5583 |
28.5882 |
15 |
28.5882 |
30.87456 |
33.1609 |
16 |
33.1609 |
35.7402 |
38.3195 |
17 |
38.3195 |
41.18002 |
44.0405 |
18 |
44.0405 |
47.21189 |
50.3833 |
19 |
50.3833 |
53.85064 |
57.3180 |
20 |
57.3180 |
61.11284 |
64.9077 |
21 |
64.9077 |
69.02168 |
73.1357 |
22 |
73.1357 |
77.61116 |
82.0866 |
23 |
82.0866 |
86.92943 |
91.7722 |
24 |
91.7722 |
97.04131 |
102.3104 |
25 |
102.3104 |
108.0303 |
113.7502 |
26 |
113.7502 |
120.0 |
126.2498 |
27 |
126.2498 |
133.0758 |
139.9018 |
28 |
139.9018 |
147.4062 |
154.9107 |
29 |
154.9107 |
163.1645 |
171.4182 |
30 |
171.4182 |
180.5499 |
189.6816 |
31 |
189.6816 |
199.79 |
209.8983 |
32 |
209.8983 |
221.1412 |
232.3841 |
33 |
232.3841 |
244.8906 |
257.3972 |
34 |
257.3972 |
271.3564 |
285.3156 |
35 |
285.3156 |
300.8875 |
316.4594 |
36 |
316.4594 |
333.8628 |
351.2662 |
37 |
351.2662 |
370.6885 |
390.1107 |
38 |
390.1107 |
411.7939 |
433.4770 |
39 |
433.4770 |
457.6256 |
481.7743 |
40 |
481.7743 |
508.6399 |
535.5055 |
41 |
535.5055 |
565.2923 |
595.0790 |
42 |
595.0790 |
628.026 |
660.9729 |
43 |
660.9729 |
697.2587 |
733.5444 |
44 |
733.5444 |
773.3683 |
813.1921 |
45 |
813.1921 |
856.679 |
900.1657 |
46 |
900.1657 |
947.4479 |
994.7300 |
47 |
994.7300 |
1045.854 |
1096.9786 |
48 |
1096.9786 |
1151.991 |
1207.0039 |
49 |
1207.0039 |
1265.861 |
1324.7189 |
50 |
1324.7189 |
1387.377 |
1450.0351 |
51 |
1450.0351 |
1516.364 |
1582.6922 |
52 |
1582.6922 |
1652.568 |
1722.4447 |
53 |
1722.4447 |
1795.671 |
1868.8969 |
54 |
1868.8969 |
1945.296 |
2021.6940 |
55 |
2021.6940 |
2101.027 |
2180.3590 |
56 |
2180.3590 |
2262.422 |
2344.4842 |
57 |
2344.4842 |
2429.025 |
2513.5662 |
58 |
2513.5662 |
2600.38 |
2687.1947 |
59 |
2687.1947 |
2776.039 |
2864.8840 |
60 |
2864.8840 |
2955.57 |
3046.2568 |
61 |
3046.2568 |
3138.565 |
3230.8729 |
62 |
3230.8729 |
3324.641 |
3418.4088 |
63 |
3418.4088 |
3513.446 |
3608.4824 |
64 |
3608.4824 |
3704.657 |
3800.8309 |
65 |
3800.8309 |
3897.982 |
3995.1330 |
66 |
3995.1330 |
4093.159 |
4191.1845 |
67 |
4191.1845 |
4289.953 |
4388.7203 |
68 |
4388.7203 |
4488.155 |
4587.5889 |
69 |
4587.5889 |
4687.581 |
4787.5733 |
70 |
4787.5733 |
4888.07 |
4988.5663 |
71 |
4988.5663 |
5089.479 |
5190.3908 |
72 |
5190.3908 |
5291.683 |
5392.9755 |
73 |
5392.9755 |
5494.575 |
5596.1751 |
74 |
5596.1751 |
5698.061 |
5799.9464 |
75 |
5799.9464 |
5902.058 |
6004.1692 |
IFS-FESOM¶
IFS-FESOM’s ocean component (FESOM) uses 69 vertical levels, reaching a maximum depth of 6350 m.
Level |
Depth top (m) |
Depth bottom (m) |
|---|---|---|
1 |
0 |
5 |
2 |
5 |
10 |
3 |
10 |
15 |
4 |
15 |
20 |
5 |
20 |
25 |
6 |
25 |
30 |
7 |
30 |
35 |
8 |
35 |
40 |
9 |
40 |
45 |
10 |
45 |
50 |
11 |
50 |
55 |
12 |
55 |
60 |
13 |
60 |
65 |
14 |
65 |
70 |
15 |
70 |
75 |
16 |
75 |
80 |
17 |
80 |
85 |
18 |
85 |
90 |
19 |
90 |
95 |
20 |
95 |
100 |
21 |
100 |
110 |
22 |
110 |
120 |
23 |
120 |
130 |
24 |
130 |
140 |
25 |
140 |
150 |
26 |
150 |
160 |
27 |
160 |
170 |
28 |
170 |
180 |
29 |
180 |
190 |
30 |
190 |
200 |
31 |
200 |
220 |
32 |
220 |
240 |
33 |
240 |
260 |
34 |
260 |
280 |
35 |
280 |
300 |
36 |
300 |
340 |
37 |
340 |
380 |
38 |
380 |
420 |
39 |
420 |
460 |
40 |
460 |
500 |
41 |
500 |
540 |
42 |
540 |
580 |
43 |
580 |
620 |
44 |
620 |
660 |
45 |
660 |
760 |
46 |
760 |
860 |
47 |
860 |
1040 |
48 |
1040 |
1180 |
49 |
1180 |
1330 |
50 |
1330 |
1500 |
51 |
1500 |
1700 |
52 |
1700 |
1920 |
53 |
1920 |
2150 |
54 |
2150 |
2400 |
55 |
2400 |
2650 |
56 |
2650 |
2900 |
57 |
2900 |
3150 |
58 |
3150 |
3400 |
59 |
3400 |
3650 |
60 |
3650 |
3900 |
61 |
3900 |
4150 |
62 |
4150 |
4400 |
63 |
4400 |
4650 |
64 |
4650 |
4900 |
65 |
4900 |
5150 |
66 |
5150 |
5400 |
67 |
5400 |
5650 |
68 |
5650 |
6000 |
69 |
6000 |
6350 |