[10279] | 1 | ********************** |
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[10186] | 2 | Explore the test cases |
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[10279] | 3 | ********************** |
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[10186] | 4 | |
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[10279] | 5 | .. contents:: |
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| 6 | :local: |
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| 7 | |
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| 8 | List |
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| 9 | ==== |
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| 10 | |
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[10204] | 11 | The description below is a brief description of the test cases available in NEMO. |
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[10186] | 12 | |
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[10554] | 13 | ICE_AGRIF |
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| 14 | --------- |
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[10204] | 15 | |
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[10554] | 16 | This test case illustrates the advection of an ice patch across an East/West and North/South periodic channel |
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| 17 | over a slab ocean (i.e. one ocean layer), and with an AGRIF zoom (1:3) in the center |
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| 18 | The purpose of this configuration is to test the advection of the ice patch in |
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| 19 | and across the AGRIF boundary |
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| 20 | One can either impose ice velocities or ice-atm. stresses and let rheology define velocities |
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| 21 | (see README for details) |
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[10201] | 22 | |
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[10554] | 23 | .. image:: _static/ICE_AGRIF_UDIAG_43days_UM5.gif |
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[10201] | 24 | |
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[10204] | 25 | VORTEX |
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[10279] | 26 | ------ |
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[10204] | 27 | |
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| 28 | This test case illustrates the propagation of an anticyclonic eddy over a Beta plan and a flat bottom. |
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| 29 | It is implemented here with an online refined subdomain (1:3) out of which the vortex propagates. |
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[10240] | 30 | It serves as a benchmark for quantitative estimates of nesting errors as in Debreu et al. (2012) :cite:`DEBREU2012`, |
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| 31 | Penven et al. (2006) :cite:`PENVEN2006` or Spall and Holland (1991) :cite:`SPALL1991`. |
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[10230] | 32 | |
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[10204] | 33 | The animation below (sea level anomaly in meters) illustrates with two 1:2 successively nested grids how |
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| 34 | the vortex smoothly propagates out of the refined grids. |
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| 35 | |
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| 36 | .. image:: _static/VORTEX_anim.gif |
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[10201] | 37 | |
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[10204] | 38 | ISOMIP |
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[10279] | 39 | ------ |
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[10201] | 40 | |
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[10230] | 41 | The purpose of this test case is to evaluate the impact of various schemes and new development with the iceshelf cavities circulation and melt. |
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[10240] | 42 | This configuration served as initial assesment of the ice shelf module in Losh et al. (2008) :cite:`LOSCH2008` and Mathiot et al. (2017) :cite:`MATHIOT2017`. |
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[10230] | 43 | The default setup is the one described `here <http://staff.acecrc.org.au/~bkgalton/ISOMIP/test_cavities.pdf>`_. |
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[10204] | 44 | |
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[10230] | 45 | The figure below (meridional overturning circulation) illustrates the circulation generated after 10000 days by the ice shelf melting (ice pump). |
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[10201] | 46 | |
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[10204] | 47 | .. image:: _static/ISOMIP_moc.png |
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| 48 | |
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| 49 | LOCK_EXCHANGE |
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[10279] | 50 | ------------- |
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[10204] | 51 | |
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| 52 | The LOCK EXCHANGE experiment is a classical fluid dynamics experiment that has been adapted |
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[10240] | 53 | by Haidvogel and Beckmann (1999) :cite:`HAIDVOGEL1999` for testing advection schemes in ocean circulation models. |
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| 54 | It has been used by several authors including Burchard and Bolding (2002) :cite:`BURCHARD2002` and Ilicak et al. (2012) :cite:`ILICAK2012`. |
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| 55 | The LOCK EXCHANGE experiment can in particular illustrate the impact of different choices of numerical schemes |
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[10204] | 56 | and/or subgrid closures on spurious interior mixing. |
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| 57 | |
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[10240] | 58 | Below the animation of the LOCK_EXCHANGE test case using the advection scheme FCT4 (forth order) for tracer and ubs for dynamics. |
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| 59 | |
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[10219] | 60 | .. image:: _static/LOCK-FCT4_flux_ubs.gif |
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[10204] | 61 | |
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| 62 | OVERFLOW |
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[10279] | 63 | -------- |
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[10204] | 64 | |
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| 65 | The OVERFLOW experiment illustrates the impact of different choices of numerical schemes |
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| 66 | and/or subgrid closures on spurious interior mixing close to bottom topography. |
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| 67 | The OVERFLOW experiment is adapted from the non-rotating overflow configuration described |
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[10240] | 68 | in Haidvogel and Beckmann (1999) :cite:`HAIDVOGEL1999` and further used by Ilicak et al. (2012) :cite:`ILICAK2012`. |
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| 69 | Here we can assess the behaviour of the second-order tracer advection scheme FCT2 and fortht-order FCT4, z-coordinate and sigma coordinate (...). |
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[10204] | 70 | |
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[10240] | 71 | Below the animation of the OVERFLOW test case in sigma coordinate with the forth-order advection scheme FCT4. |
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| 72 | |
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[10219] | 73 | .. image:: _static/OVF-sco_FCT4_flux_cen-ahm1000.gif |
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[10204] | 74 | |
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| 75 | WAD |
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[10279] | 76 | --- |
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[10204] | 77 | |
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| 78 | A set of simple closed basin geometries for testing the Wetting and drying capabilities. |
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| 79 | Examples range from a closed channel with EW linear bottom slope to a parabolic EW channel with a Gaussian ridge. |
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| 80 | |
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| 81 | Below the animation of the test case 7. This test case is a simple linear slope with a mid-depth shelf with an open boundary forced with a sinusoidally varying ssh. |
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| 82 | This test case has been introduced to emulate a typical coastal application with a tidally forced open boundary with an adverse SSH gradient that, when released, creates a surge up the slope. |
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| 83 | The parameters are chosen such that the surge rises above sea-level before falling back and oscillating towards an equilibrium position |
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| 84 | |
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| 85 | .. image:: _static/wad_testcase_7.gif |
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| 86 | |
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[10240] | 87 | CANAL |
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[10279] | 88 | ----- |
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[10240] | 89 | |
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| 90 | East-west periodic canal of variable size with several initial states and associated geostrophic currents (zonal jets or vortex). |
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| 91 | |
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| 92 | .. image::_static/CANAL_image.gif |
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| 93 | |
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[10554] | 94 | ICE_ADV2D |
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| 95 | --------- |
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| 96 | |
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| 97 | This test case illustrates the advection of an ice patch across an East/West and North/South periodic channel |
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| 98 | over a slab ocean (i.e. one ocean layer). |
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| 99 | The configuration is similar to ICE_AGRIF, except for the AGRIF zoom. |
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| 100 | The purpose of this configuration is to test the advection schemes available in the sea-ice code |
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| 101 | (for now, Prather and Ultimate-Macho from 1st to 5th order), |
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| 102 | especially the occurence of overshoots in ice thickness |
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| 103 | |
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| 104 | |
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| 105 | ICE_ADV1D |
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| 106 | --------- |
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| 107 | |
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| 108 | This experiment is the classical Schar & Smolarkiewicz (1996) test case :cite:`SCHAR1996`, |
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| 109 | which has been used in :cite:`LIPSCOMB2004`, |
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| 110 | and in which very specific shapes of ice concentration, thickness and volume converge toward the center of a basin. |
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| 111 | Convergence is unidirectional (in x) while fields are homogeneous in y. |
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| 112 | The purpose of this configuration is to test the caracteristics of advection schemes available in the sea-ice code |
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| 113 | (for now, Prather and Ultimate-Macho from 1st to 5th order), |
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| 114 | especially the constitency between concentration, thickness and volume, and the preservation of initial shapes. |
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| 115 | |
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| 116 | |
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| 117 | |
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| 118 | |
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[10240] | 119 | Compile test cases |
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| 120 | ================== |
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[10279] | 121 | |
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[10240] | 122 | The compilation of the test cases is very similar to the manner the reference configurations are compiled. |
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[10279] | 123 | If you are not familiar on how to compile NEMO, it is first recomended to read :doc:`the instructions <install>` |
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[10240] | 124 | |
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| 125 | | In the same manner as the ref. cfg are compiled with '-r' option, test cases can be compile by the use of makenemo with '-a' option. |
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| 126 | |
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| 127 | | Here an example to compile a copy named WAD2 of the wetting and drying test case (WAD) on the macport_osx architecture on 4 cores: |
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| 128 | |
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| 129 | .. code-block:: console |
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[10279] | 130 | |
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| 131 | $ ./makenemo -n WAD2 -a WAD -m macport_osx -j 4 |
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[10240] | 132 | |
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| 133 | Run and analyse the test cases |
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[10279] | 134 | ============================== |
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| 135 | |
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[10240] | 136 | There no requirement of specific input file for the test_cases presented here. The XIOS xml input files and namelist are already setup correctly. |
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[10279] | 137 | For detailed description and Jupyter notebook, the reader is directed on |
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| 138 | the `NEMO test cases repository <http://github.com/NEMO-ocean/NEMO-examples>`_ |
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[10240] | 139 | |
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[10201] | 140 | References |
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| 141 | ========== |
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[10240] | 142 | |
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[10279] | 143 | .. bibliography:: test_cases.bib |
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| 144 | :all: |
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| 145 | :style: unsrt |
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| 146 | :labelprefix: T |
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