.. _ocean_model_levels: 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. .. list-table:: :widths: 15 25 25 :header-rows: 1 * - 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. .. list-table:: :widths: 15 25 25 25 :header-rows: 1 * - 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. .. list-table:: :widths: 15 25 25 :header-rows: 1 * - 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