source: NEMO/branches/2019/dev_r10984_HPC-13_IRRMANN_BDY_optimization/tests/README.rst @ 11376

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1**********************
2Explore the test cases
3**********************
4
5The complete and up-to-date set of test cases is available on
6`NEMO test cases Github repository <http://github.com/NEMO-ocean/NEMO-examples>`_.
7
8Download it directly in the ``./tests`` root directory with
9
10.. code-block:: console
11
12   $ git clone http://github.com/NEMO-ocean/NEMO-examples
13
14.. contents::
15   :local:
16
17Procedure
18=========
19
20Compile test cases
21------------------
22
23The compilation of the test cases is very similar to the manner the reference configurations are compiled.
24If you are not familiar on how to compile NEMO, it is first recomended to read :doc:`the instructions <install>`
25
26| 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.
27| 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:
28
29.. code-block:: console
30
31   $ ./makenemo -n 'WAD2' -a 'WAD' -m 'macport_osx' -j '4'
32
33Run and analyse the test cases
34------------------------------
35
36There no requirement of specific input file for the test_cases presented here. The XIOS xml input files and namelist are already setup correctly.
37For detailed description and Jupyter notebook, the reader is directed on
38the `NEMO test cases repository <http://github.com/NEMO-ocean/NEMO-examples>`_
39
40The description below is a brief advertisement of some test cases.
41
42ICE_AGRIF
43=========
44 
45  This test case illustrates the advection of an ice patch across an East/West and North/South periodic channel
46  over a slab ocean (i.e. one ocean layer), and with an AGRIF zoom (1:3) in the center
47  The purpose of this configuration is to test the advection of the ice patch in 
48  and across the AGRIF boundary
49  One can either impose ice velocities or ice-atm. stresses and let rheology define velocities
50  (see README for details)
51
52  .. image:: _static/ICE_AGRIF_UDIAG_43days_UM5.gif
53
54VORTEX
55======
56 
57  This test case illustrates the propagation of an anticyclonic eddy over a Beta plan and a flat bottom.
58  It is implemented here with an online refined subdomain (1:3) out of which the vortex propagates.
59  It serves as a benchmark for quantitative estimates of nesting errors as in Debreu et al. (2012) :cite:`DEBREU2012`,
60  Penven et al. (2006) :cite:`PENVEN2006` or Spall and Holland (1991) :cite:`SPALL1991`.
61 
62  The animation below (sea level anomaly in meters) illustrates with two 1:2 successively nested grids how
63  the vortex smoothly propagates out of the refined grids.
64 
65  .. image:: _static/VORTEX_anim.gif
66
67ISOMIP
68======
69
70  The purpose of this test case is to evaluate the impact of various schemes and new development with the iceshelf cavities circulation and melt.
71  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`.
72  The default setup is the one described `here <http://staff.acecrc.org.au/~bkgalton/ISOMIP/test_cavities.pdf>`_.
73 
74  The figure below (meridional overturning circulation) illustrates the circulation generated after 10000 days by the ice shelf melting (ice pump).
75
76  .. image:: _static/ISOMIP_moc.png
77
78LOCK_EXCHANGE
79=============
80
81  The LOCK EXCHANGE experiment is a classical fluid dynamics experiment that has been adapted
82  by Haidvogel and Beckmann (1999) :cite:`HAIDVOGEL1999` for testing advection schemes in ocean circulation models.
83  It has been used by several authors including Burchard and Bolding (2002) :cite:`BURCHARD2002` and Ilicak et al. (2012) :cite:`ILICAK2012`.
84  The LOCK EXCHANGE experiment can in particular illustrate the impact of different choices of numerical schemes
85  and/or subgrid closures on spurious interior mixing.
86
87  Below the animation of the LOCK_EXCHANGE test case using the advection scheme FCT4 (forth order) for tracer and ubs for dynamics.
88
89  .. image:: _static/LOCK-FCT4_flux_ubs.gif
90
91OVERFLOW
92========
93
94  The OVERFLOW experiment illustrates the impact of different choices of numerical schemes
95  and/or subgrid closures on spurious interior mixing close to bottom topography.
96  The OVERFLOW experiment is adapted from the non-rotating overflow configuration described
97  in Haidvogel and Beckmann (1999) :cite:`HAIDVOGEL1999` and further used by Ilicak et al. (2012) :cite:`ILICAK2012`.
98  Here we can assess the behaviour of the second-order tracer advection scheme FCT2 and fortht-order FCT4, z-coordinate and sigma coordinate (...).
99
100  Below the animation of the OVERFLOW test case in sigma coordinate with the forth-order advection scheme FCT4.
101
102  .. image:: _static/OVF-sco_FCT4_flux_cen-ahm1000.gif
103
104WAD
105===
106
107  A set of simple closed basin geometries for testing the Wetting and drying capabilities.
108  Examples range from a closed channel with EW linear bottom slope to a parabolic EW channel with a Gaussian ridge.
109 
110  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.
111  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.
112  The parameters are chosen such that the surge rises above sea-level before falling back and oscillating towards an equilibrium position
113
114  .. image:: _static/wad_testcase_7.gif
115
116CANAL
117=====
118
119  East-west periodic canal of variable size with several initial states and associated geostrophic currents (zonal jets or vortex).
120
121  .. image::_static/CANAL_image.gif
122
123ICE_ADV2D
124=========
125 
126  This test case illustrates the advection of an ice patch across an East/West and North/South periodic channel
127  over a slab ocean (i.e. one ocean layer).
128  The configuration is similar to ICE_AGRIF, except for the AGRIF zoom.
129  The purpose of this configuration is to test the advection schemes available in the sea-ice code
130  (for now, Prather and Ultimate-Macho from 1st to 5th order),
131  especially the occurence of overshoots in ice thickness
132 
133
134ICE_ADV1D
135=========
136 
137  This experiment is the classical Schar & Smolarkiewicz (1996) test case :cite:`SCHAR1996`,
138  which has been used in :cite:`LIPSCOMB2004`,
139  and in which very specific shapes of ice concentration, thickness and volume converge toward the center of a basin.
140  Convergence is unidirectional (in x) while fields are homogeneous in y.
141  The purpose of this configuration is to test the caracteristics of advection schemes available in the sea-ice code
142  (for now, Prather and Ultimate-Macho from 1st to 5th order),
143  especially the constitency between concentration, thickness and volume, and the preservation of initial shapes. 
144
145References
146==========
147
148.. bibliography:: test_cases.bib
149   :all:
150   :style: unsrt
151   :labelprefix: T
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