1 | ====================== |
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2 | Explore the test cases |
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3 | ====================== |
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4 | |
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5 | The description below is a brief description of the test cases available in NEMO. |
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6 | For detailed description and notebook, the reader is directed on the `Github repository`_ |
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7 | |
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8 | .. _Github repository: https://github.com/sflavoni/NEMO-test-cases/ |
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9 | |
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10 | CANAL |
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11 | ===== |
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12 | |
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13 | East-west periodic canal of variable size with several initial states and associated geostrophic currents (zonal jets or vortex) |
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14 | |
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15 | .. image::_static/CANAL_image.gif |
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16 | |
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17 | ICEDYN |
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18 | ====== |
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19 | |
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20 | This is an East-t cases illustrate the advection of an ice patch across a East/West and North/South periodic channel. |
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21 | This configuration can be used to test the advection of the ice patch in an AGRIF zoom (1:3) |
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22 | and across the AGRIF boundary or to test the ice advection schemes (Prather and Ultimate-Macho). |
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23 | In the latest case user need to remove ``key_agrif`` out of the CPP keys list. |
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24 | |
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25 | .. image:: _static/ICEDYN_UDIAG_43days_UM5.gif |
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26 | |
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27 | VORTEX |
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28 | ====== |
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29 | |
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30 | This test case illustrates the propagation of an anticyclonic eddy over a Beta plan and a flat bottom. |
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31 | It is implemented here with an online refined subdomain (1:3) out of which the vortex propagates. |
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32 | It serves as a benchmark for quantitative estimates of nesting errors as in Debreu et al. (2012), |
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33 | Penven et al. (2006) or Spall and Holland (1991). |
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34 | |
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35 | The animation below (sea level anomaly in meters) illustrates with two 1:2 successively nested grids how |
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36 | the vortex smoothly propagates out of the refined grids. |
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37 | |
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38 | .. image:: _static/VORTEX_anim.gif |
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39 | |
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40 | ISOMIP |
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41 | ====== |
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42 | |
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43 | 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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44 | This configuration served as initial assesment of the ice shelf module in Losh et al. (2008) and Mathiot et al. (2017). |
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45 | The default setup is the one described `here <http://staff.acecrc.org.au/~bkgalton/ISOMIP/test_cavities.pdf>`_. |
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46 | |
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47 | The figure below (meridional overturning circulation) illustrates the circulation generated after 10000 days by the ice shelf melting (ice pump). |
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48 | |
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49 | .. image:: _static/ISOMIP_moc.png |
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50 | |
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51 | LOCK_EXCHANGE |
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52 | ============= |
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53 | |
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54 | The LOCK EXCHANGE experiment is a classical fluid dynamics experiment that has been adapted |
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55 | by Haidvogel and Beckmann (1999) for testing advection schemes in ocean circulation models. |
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56 | It has been used by several authors including Burchard and Bolding (2002) and Ilicak et al. (2012). |
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57 | The LOCK EXCHANGE experiment can in particulart illustrate the impact of different choices of numerical schemes |
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58 | and/or subgrid closures on spurious interior mixing. |
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59 | |
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60 | .. image:: _static/LOCK-FCT4_flux_ubs.gif |
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61 | |
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62 | OVERFLOW |
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63 | ======== |
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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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68 | in Haidvogel and Beckmann (1999) and further used by Ilicak et al. (2012). |
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69 | Here we can assess the behaviour of the second-order tracer advection scheme FCT2 and fortht-order FCT4, |
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70 | with some exemple of python scripts into the notebook associated. |
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71 | |
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72 | .. image:: _static/OVF-sco_FCT4_flux_cen-ahm1000.gif |
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73 | |
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74 | WAD |
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75 | === |
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76 | |
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77 | A set of simple closed basin geometries for testing the Wetting and drying capabilities. |
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78 | Examples range from a closed channel with EW linear bottom slope to a parabolic EW channel with a Gaussian ridge. |
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79 | |
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80 | 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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81 | 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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82 | 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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83 | |
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84 | .. image:: _static/wad_testcase_7.gif |
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85 | |
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86 | ========== |
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87 | References |
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88 | ========== |
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89 | - Burchard, H., Bolding, K., 2002. GETM - a general estuarine transport model. Scientific documentation. Tech. Rep. EUR 20253 EN, European Commission. |
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90 | - Debreu, L., P. Marchesiello, P. Penven and G. Cambon, 2012: Two-way nesting in split-explicit ocean models: Algorithms, implementation and validation. Ocean Modelling, 49-50, 1-21. |
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91 | - Haidvogel, Dale B., and Aike Beckmann. Numerical ocean circulation modeling. Vol. 2. World Scientific, 1999. |
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92 | - Haidvogel, Dale B., and Aike Beckmann. Numerical ocean circulation modeling. Vol. 2. World Scientific, 1999. |
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93 | - Ilicak, Mehmet, et al. "Spurious dianeutral mixing and the role of momentum closure." Ocean Modelling 45 (2012): 37-58. |
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94 | - Ilicak, Mehmet, et al. "Spurious dianeutral mixing and the role of momentum closure." Ocean Modelling 45 (2012): 37-58. |
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95 | - Losch, M., 2008: Modeling ice shelf cavities in a z coordinate ocean general circulation model, J. Geophys. Res.-Oceans, 113, C08043. |
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96 | - Mathiot, P., Jenkins, A., Harris, C., and Madec, G., 2017: Explicit representation and parametrised impacts of under ice shelf seas in the z* coordinate ocean model NEMO 3.6, Geosci. Model Dev., 10, 2849-2874. |
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97 | - Penven, P., L. Debreu, P. Marchesiello and J. C. Mc Williams, 2006: Evaluation and application of the ROMS 1-way embedding procedure to the central california upwelling system. Ocean Modelling, 12, 157-187. |
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98 | - Spall, M. A. and W. R. Holland, 1991: A Nested Primitive Equation Model for Oceanic Applications. J. Phys. Ocean., 21, 205-220. |
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