1 |
% $Header$ |
% $Header$ |
2 |
% $Name$ |
% $Name$ |
3 |
|
|
4 |
\section{Tutorials} |
\section[MITgcm Example Experiments]{Example experiments} |
5 |
\label{sect:tutorials} |
\label{sect:modelExamples} |
6 |
\label{www:tutorials} |
\begin{rawhtml} |
7 |
|
<!-- CMIREDIR:modelExamples: --> |
8 |
|
\end{rawhtml} |
9 |
|
|
10 |
|
%% a set of pre-configured numerical experiments |
11 |
|
|
12 |
|
The full MITgcm distribution comes with a set of pre-configured |
13 |
|
numerical experiments. Some of these example experiments are tests of |
14 |
|
individual parts of the model code, but many are fully fledged |
15 |
|
numerical simulations. Full tutorials exist for a few of the examples, |
16 |
|
and are documented in sections \ref{sect:eg-baro} - |
17 |
|
\ref{sect:eg-tank}. The other examples follow the same general |
18 |
|
structure as the tutorial examples. However, they only include brief |
19 |
|
instructions in a text file called {\it README}. The examples are |
20 |
|
located in subdirectories under the directory \texttt{verification}. |
21 |
|
Each example is briefly described below. |
22 |
|
|
23 |
|
\subsection{Full list of model examples} |
24 |
|
|
25 |
|
\begin{enumerate} |
26 |
|
|
27 |
|
\item \texttt{tutorial\_advection\_in\_gyre} - Test of various |
28 |
|
advection schemes in a single-layer double-gyre experiment. |
29 |
|
This experiment is described in detail in section |
30 |
|
\ref{sect:eg-adv-gyre}. |
31 |
|
|
32 |
|
\item \texttt{tutorial\_baroclinic\_gyre} - Four layer, ocean double |
33 |
|
gyre. This experiment is described in detail in section |
34 |
|
\ref{sect:eg-fourlayer}. |
35 |
|
|
36 |
|
\item \texttt{tutorial\_barotropic\_gyre} - Single layer, ocean double |
37 |
|
gyre (barotropic with free-surface). |
38 |
|
This experiment is described in detail in section \ref{sect:eg-baro}. |
39 |
|
|
40 |
|
\item \texttt{tutorial\_cfc\_offline} - Offline form of the MITgcm to |
41 |
|
study advection of a passive tracer and CFCs. |
42 |
|
This experiment is described in detail in section \ref{sect:eg-offline-cfc}. |
43 |
|
|
44 |
|
\item \texttt{tutorial\_deep\_convection} - Inhomogenously forced |
45 |
|
ocean convection in a doubly periodic box. This experiment is |
46 |
|
described in detail in section \ref{sect:eg-bconv}. |
47 |
|
|
48 |
|
\item \texttt{tutorial\_global\_oce\_biogeo} - Ocean model coupled to |
49 |
|
the dissolved inorganic carbon biogeochemistry model. This |
50 |
|
experiment is described in detail in section |
51 |
|
\ref{sect:eg-biogeochem_tutorial}. |
52 |
|
|
53 |
|
\item \texttt{tutorial\_global\_oce\_in\_p} - Global ocean simulation in |
54 |
|
pressure coordinate (non-Boussinesq ocean model). Described in |
55 |
|
detail in section \ref{sect:eg-globalpressure}. |
56 |
|
|
57 |
|
\item \texttt{tutorial\_global\_oce\_latlon} - 4x4 degree global ocean |
58 |
|
simulation with steady climatological forcing. This experiment is |
59 |
|
described in detail in section \ref{sect:eg-global}. |
60 |
|
|
61 |
|
\item \texttt{tutorial\_global\_oce\_optim} - Global ocean state |
62 |
|
estimation at $4^\circ$ resolution. This experiment is described in |
63 |
|
detail in section \ref{sect:eg-global_state_estimate}. |
64 |
|
|
65 |
|
\item \texttt{tutorial\_held\_suarez\_cs} - 3D atmosphere dynamics |
66 |
|
using Held and Suarez (1994) forcing on cubed sphere grid. This |
67 |
|
experiment is described in detail in section \ref{sect:eg-hs}. |
68 |
|
|
69 |
|
\item \texttt{tutorial\_offline} - Offline form of the MITgcm to study |
70 |
|
advection of a passive tracer. This experiment is described in |
71 |
|
detail in section \ref{sect:eg-offline}. |
72 |
|
|
73 |
|
\item \texttt{tutorial\_plume\_on\_slope} - Gravity Plume on a |
74 |
|
continental slope. This experiment is described in detail in |
75 |
|
section \ref{sect:eg-gravityplume}. |
76 |
|
|
77 |
|
\item \texttt{tutorial\_tracer\_adjsens} - Simple passive tracer |
78 |
|
experiment. Includes derivative calculation. This experiment is |
79 |
|
described in detail in section \ref{sect:eg-simple-tracer-adjoint}. |
80 |
|
|
81 |
|
\item \texttt{adjustment.128x64x1} - Barotropic adjustment problem on |
82 |
|
latitude longitude grid with 128x64 grid points ($2.8^\circ$ resolution). |
83 |
|
|
84 |
|
\item \texttt{adjustment.cs-32x32x1} - Barotropic adjustment problem on |
85 |
|
cube sphere grid with 32x32 points per face (roughly $2.8^\circ$ |
86 |
|
resolution).\\ |
87 |
|
Also contains a non-linear free-surface adjustment version ({\it input.nlfs/}). |
88 |
|
|
89 |
|
\item \texttt{advect\_cs} Two-dimensional passive advection test on |
90 |
|
cube sphere grid (32x32 grid points per face, roughly $2.8^\circ$) |
91 |
|
|
92 |
|
\item \texttt{advect\_xy} - Two-dimensional (horizontal plane) passive |
93 |
|
advection test on Cartesian grid.\\ |
94 |
|
Also contains an additional set-up using Adams-Bashforth 3 ({\it input.ab3\_c4/}). |
95 |
|
|
96 |
|
\item \texttt{advect\_xz} - Two-dimensional (vertical plane) passive |
97 |
|
advection test on Cartesian grid. |
98 |
|
|
99 |
|
\item \texttt{aim.5l\_Equatorial\_Channel} |
100 |
|
- 5-levels Intermediate Atmospheric physics, |
101 |
|
3D Equatorial Channel configuration. |
102 |
|
|
103 |
|
\item \texttt{aim.5l\_LatLon} - 5-levels Intermediate Atmospheric physics, |
104 |
|
Global configuration, on latitude longitude grid with 128x64x5 grid |
105 |
|
points ($2.8^\circ$ resolution). |
106 |
|
|
107 |
|
\item \texttt{aim.5l\_cs} - 5-levels Intermediate Atmospheric physics, |
108 |
|
Global configuration on cube sphere grid |
109 |
|
(32x32 grid points per face, roughly $2.8^\circ$).\\ |
110 |
|
Also contains an additional set-up with an ocean mixed layer and thermodynamics |
111 |
|
sea-ice ({\it input.thSI/}). |
112 |
|
|
113 |
|
\item \texttt{bottom\_ctrl\_5x5} - Adjoint test using the bottom |
114 |
|
topography as the control parameter. |
115 |
|
|
116 |
|
\item \texttt{cfc\_example} - Global ocean with online computation and |
117 |
|
advection of CFC11 and CFC12. |
118 |
|
|
119 |
|
\item \texttt{cpl\_aim+ocn} - Coupled Ocean - Atmosphere realistic |
120 |
|
configuration on cubed-sphere cs32 horizontal grid, |
121 |
|
using Intermediate Atmospheric physics ({\it pkg/aim\_v23}) |
122 |
|
thermodynamics seaice ({\it pkg/thsice}) and land packages. |
123 |
|
on cubed-sphere cs32 in a realistics configuration. |
124 |
|
|
125 |
|
\item \texttt{cpl\_atm2d+ocn} - Coupled Ocean - Atmosphere realistic |
126 |
|
configuration using 2-D Atmospheric Model ({\it pkg/atm2d}). |
127 |
|
|
128 |
|
\item \texttt{deep\_anelastic} - Convection simulation on a giant planet: |
129 |
|
relax both the Boussinesq approximation (anelastic) and the thin atmosphere |
130 |
|
approximation (deep atmosphere). |
131 |
|
|
132 |
|
\item \texttt{dome} - Idealized 3D test of a density-driven bottom current. |
133 |
|
|
134 |
|
\item \texttt{exp2} - Old version of the global ocean experiment (no GM, |
135 |
|
no partial-cells).\\ |
136 |
|
Also contains an additional set-up with ridid-lid ({\it input.rigidLid/}). |
137 |
|
|
138 |
|
\item \texttt{exp4} - Flow over a Gaussian bump in open-water or |
139 |
|
channel with open boundaries. |
140 |
|
|
141 |
|
\item \texttt{exp5} - Deep convection. |
142 |
|
|
143 |
|
\item \texttt{fizhi-cs-32x32x40} - Global atmospheric simulation with |
144 |
|
realistic topography, 40 vertical levels, a cubed sphere grid and |
145 |
|
the full atmospheric physics package. |
146 |
|
|
147 |
|
\item \texttt{fizhi-cs-aqualev20} - Global atmospheric simulation on an |
148 |
|
aqua planet with full atmospheric physics. Run is perpetual march |
149 |
|
with an analytical SST distribution. This is the configuration for |
150 |
|
the APE (Aqua Planet Experiment) participation experiment. |
151 |
|
|
152 |
|
\item \texttt{fizhi-gridalt-hs} - Global atmospheric simulation |
153 |
|
Held-Suarez (1994) forcing, with the physical forcing and the |
154 |
|
dynamical forcing running on different vertical grids. |
155 |
|
|
156 |
|
\item \texttt{flt\_example} - Example of using float package. |
157 |
|
|
158 |
|
\item \texttt{front\_relax} - Relaxation of an ocean thermal front |
159 |
|
(test for Gent/McWilliams scheme). 2D (Y-Z).\\ |
160 |
|
Also contains an additional set-up with Mixed-Layer Eddy parameterization |
161 |
|
(Ferrari \& McWilliams, 2007) ({\it input.mxl/}). |
162 |
|
|
163 |
|
\item \texttt{global1x1\_tot} - ECCO-GODAE production configuration |
164 |
|
version 1, 2 \& 3 |
165 |
|
|
166 |
|
\item \texttt{global2x2\_tot} - ECCO production configuration version 0 |
167 |
|
|
168 |
|
\item \texttt{global\_ocean.90x40x15} Global ocean simulation at 4x4 |
169 |
|
degree resolution. Similar to tutorial\_global\_oce\_latlon, with |
170 |
|
quasi-non-hydrostatics and non-hydrostatic metric terms.\\ |
171 |
|
Also contains an adjoint set-up ({\it code\_ad/, input\_ad/}). |
172 |
|
|
173 |
|
\item \texttt{global\_ocean.cs32x15} - Global ocean experiment on the |
174 |
|
cubed sphere grid.\\ |
175 |
|
Also contains additional set-ups: |
176 |
|
\begin{enumerate} |
177 |
|
\item non-hydrostratic with biharmonic viscosity ({\it input.viscA4/}) |
178 |
|
\item using thermodynamic sea ice and bulk force ({\it input.thsice/}) |
179 |
|
\item using thermodynamic ({\it pkg/thsice}) dynamics ({\it pkg/seaice}) sea-ice |
180 |
|
and EXF package ({\it input.icedyn/}) |
181 |
|
\end{enumerate} |
182 |
|
|
183 |
|
\item \texttt{global\_ocean\_ebm} - Global ocean experiment on a lat-lon |
184 |
|
grid coupled to an atmospheric energy balance model. Similar to |
185 |
|
global\_ocean.90x40x15 experiment.\\ |
186 |
|
Also contains an adjoint set-up ({\it code\_ad/, input\_ad/}). |
187 |
|
|
188 |
|
\item \texttt{global\_with\_exf} - Global ocean experiment on a lat-lon |
189 |
|
grid using the exf package. Similar to global\_ocean.90x40x15 |
190 |
|
experiment. |
191 |
|
|
192 |
|
\item \texttt{hs94.128x64x5} - 3D atmosphere dynamics on lat-lon grid, |
193 |
|
using Held and Suarez '94 forcing. |
194 |
|
|
195 |
|
\item \texttt{hs94.1x64x5} - Zonal averaged atmosphere dynamics |
196 |
|
using Held and Suarez '94 forcing.\\ |
197 |
|
Also contains an adjoint set-up ({\it code\_ad/, input\_ad/}). |
198 |
|
|
199 |
|
\item \texttt{hs94.cs-32x32x5} - 3D atmosphere dynamics using Held and |
200 |
|
Suarez (1994) forcing on the cubed sphere. 5 vertical levels.\\ |
201 |
|
Also contains an additional set-up with Implicit Internal gravity waves |
202 |
|
treatment ({\it input.impIGW/}). |
203 |
|
|
204 |
|
\item \texttt{ideal\_2D\_oce} - Idealized 2D global ocean simulation on |
205 |
|
an aqua planet. |
206 |
|
|
207 |
|
\item \texttt{internal\_wave} - Ocean internal wave forced by open |
208 |
|
boundary conditions. |
209 |
|
|
210 |
|
\item \texttt{inverted\_barometer} - Simple test of ocean response to |
211 |
|
atmospheric pressure loading. |
212 |
|
|
213 |
|
\item \texttt{isomip} - ISOMIP like set-up including ice-shelf cavities |
214 |
|
({\it pkg/shelfice}).\\ |
215 |
|
Also contains an additional set-up with ({\it input.htd/}) |
216 |
|
but only Martin knows what "htd" stands for. |
217 |
|
|
218 |
|
\item \texttt{lab\_sea} - Regional Labrador Sea simulation on a lat-lon |
219 |
|
grid using the sea ice package.\\ |
220 |
|
Also contains additional set-ups: |
221 |
|
\begin{enumerate} |
222 |
|
\item using the LSR solver (instead of EVP dynamics) ({\it input.lsr/}) |
223 |
|
\item using Hibler and Bryan (1987) sea-ice ocean stress ({\it input.hb87/}) |
224 |
|
\item using package {\it salt\_plume} ({\it input.salt\_plume/}) |
225 |
|
\end{enumerate} |
226 |
|
and also 3 adjoint set-ups ({\it code\_ad/, input\_ad/, input\_ad.noseaicedyn/, |
227 |
|
input\_ad.noseaice/}). |
228 |
|
|
229 |
|
\item \texttt{matrix\_example} - Test of experimental method to |
230 |
|
accelerated convergence towards equillibrium. |
231 |
|
|
232 |
|
\item \texttt{MLAdjust} - Simple tests for different viscosity formulations.\\ |
233 |
|
Also contains additional set-ups: |
234 |
|
\begin{enumerate} |
235 |
|
\item ({\it input.0.leith/}) |
236 |
|
\item ({\it input.0.leithD/}) |
237 |
|
\item ({\it input.0.smag/}) |
238 |
|
\item ({\it input.1.leith/}) |
239 |
|
\end{enumerate} |
240 |
|
|
241 |
|
\item \texttt{natl\_box} - Eastern subtropical North Atlantic with KPP |
242 |
|
scheme; 1 month integration |
243 |
|
|
244 |
|
\item \texttt{natl\_box\_adjoint} - Eastern subtropical North Atlantic with KPP |
245 |
|
scheme; adjoint set-up. |
246 |
|
|
247 |
|
\item \texttt{offline\_exf\_seaice} - oceanic surface forcing computed |
248 |
|
by bulk-formulae ({\it pkg/exf}) and inposed SST (offline ocean).\\ |
249 |
|
Also contains additional set-ups: |
250 |
|
\begin{enumerate} |
251 |
|
\item with sea-ice ({\it pkg/seaice}) thermodynamics ({\it input.seaicetd/}) |
252 |
|
\item an adjoint test ({\it code\_ad/, input\_ad/}). |
253 |
|
\end{enumerate} |
254 |
|
|
255 |
|
\item \texttt{OpenAD} simple Adjoint experiement (used also to test |
256 |
|
open-AD compiler) |
257 |
|
|
258 |
|
\item \texttt{rotating\_tank} Rotating tank simulation in cylindrical |
259 |
|
coordinates. This experiment is described in detail in section |
260 |
|
\ref{sect:eg-tank}. |
261 |
|
|
262 |
|
\item \texttt{seaice\_obcs} similar to "lab\_sea" ({\it input.salt\_plume/}) |
263 |
|
experiment with only a fraction of the domain and open-boundary conditions |
264 |
|
derived from "lab\_sea" experiment. |
265 |
|
|
266 |
|
\item \texttt{solid-body.cs-32x32x1} Solid body rotation test for cube |
267 |
|
sphere grid. |
268 |
|
|
269 |
|
\item \texttt{tidal\_basin\_2d} 2-D vertical section (X-Z) with tidal forcing |
270 |
|
|
271 |
|
\item \texttt{vermix} Simple test in a small domain (3 columns) for |
272 |
|
ocean vertical mixing schemes. The standard set-up ({\it input/}) uses |
273 |
|
KPP scheme.\\ |
274 |
|
Also contains additional set-ups: |
275 |
|
\begin{enumerate} |
276 |
|
\item with Gaspar et al. (1990) ({\it pkg/ggl90}) scheme ({\it input.ggl90/}) |
277 |
|
\item with Mellor \& Yamada (1982) level 2. ({\it pkg/my82}) scheme ({\it input.my82/}) |
278 |
|
\item with Paluszkiewicz \& Romea (1997) ({\it pkg/opps}) scheme ({\it input.opps/}) |
279 |
|
\item with Pacanowski \& Philander (1981) ({\it pkg/pp81}) scheme ({\it input.pp81/}) |
280 |
|
\end{enumerate} |
281 |
|
|
282 |
|
\end{enumerate} |
283 |
|
|
284 |
|
\subsection{Directory structure of model examples} |
285 |
|
|
286 |
|
Each example directory has the following subdirectories: |
287 |
|
|
288 |
|
\begin{itemize} |
289 |
|
\item \texttt{code}: contains the code particular to the example. At a |
290 |
|
minimum, this directory includes the following files: |
291 |
|
|
292 |
|
\begin{itemize} |
293 |
|
\item \texttt{code/packages.conf}: declares the list of packages or |
294 |
|
package groups to be used. If not included, the default version |
295 |
|
is located in \texttt{pkg/pkg\_default}. Package groups are |
296 |
|
simply convenient collections of commonly used packages which are |
297 |
|
defined in \texttt{pkg/pkg\_default}. Some packages may require |
298 |
|
other packages or may require their absence (that is, they are |
299 |
|
incompatible) and these package dependencies are listed in |
300 |
|
\texttt{pkg/pkg\_depend}. |
301 |
|
|
302 |
|
\item \texttt{code/CPP\_EEOPTIONS.h}: declares CPP keys relative to |
303 |
|
the ``execution environment'' part of the code. The default |
304 |
|
version is located in \texttt{eesupp/inc}. |
305 |
|
|
306 |
|
\item \texttt{code/CPP\_OPTIONS.h}: declares CPP keys relative to |
307 |
|
the ``numerical model'' part of the code. The default version is |
308 |
|
located in \texttt{model/inc}. |
309 |
|
|
310 |
|
\item \texttt{code/SIZE.h}: declares size of underlying |
311 |
|
computational grid. The default version is located in |
312 |
|
\texttt{model/inc}. |
313 |
|
\end{itemize} |
314 |
|
|
315 |
|
In addition, other include files and subroutines might be present in |
316 |
|
\texttt{code} depending on the particular experiment. See Section 2 |
317 |
|
for more details. |
318 |
|
|
319 |
|
\item \texttt{input}: contains the input data files required to run |
320 |
|
the example. At a minimum, the \texttt{input} directory contains the |
321 |
|
following files: |
322 |
|
|
323 |
|
\begin{itemize} |
324 |
|
\item \texttt{input/data}: this file, written as a namelist, |
325 |
|
specifies the main parameters for the experiment. |
326 |
|
|
327 |
|
\item \texttt{input/data.pkg}: contains parameters relative to the |
328 |
|
packages used in the experiment. |
329 |
|
|
330 |
|
\item \texttt{input/eedata}: this file contains ``execution |
331 |
|
environment'' data. At present, this consists of a specification |
332 |
|
of the number of threads to use in $X$ and $Y$ under multithreaded |
333 |
|
execution. |
334 |
|
\end{itemize} |
335 |
|
|
336 |
|
In addition, you will also find in this directory the forcing and |
337 |
|
topography files as well as the files describing the initial state |
338 |
|
of the experiment. This varies from experiment to experiment. See |
339 |
|
the verification directories refered to in this chapter for more details. |
340 |
|
|
341 |
|
\item \texttt{results}: this directory contains the output file |
342 |
|
\texttt{output.txt} produced by the simulation example. This file is |
343 |
|
useful for comparison with your own output when you run the |
344 |
|
experiment. |
345 |
|
|
346 |
|
\item \texttt{build}: this directory is where the model is compiled |
347 |
|
and loaded, and where the executable resides. |
348 |
|
|
349 |
\input{part3/case_studies/barotropic_gyre/baro.tex} |
\end{itemize} |
350 |
|
|
351 |
\newpage |
Once you have chosen the example you want to run, you are ready to |
352 |
\input{part3/case_studies/fourlayer_gyre/fourlayer.tex} |
compile the code. |
353 |
|
|
|
\newpage |
|
|
\input{part3/case_studies/climatalogical_ogcm/climatalogical_ogcm.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/ogcm_in_pressure/ogcm_in_pressure.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/held_suarez_cs/held_suarez_cs.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/doubly_periodic_convection/convection.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/plume_on_slope/plume_on_slope.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/carbon_outgassing_sensitivity/co2sens.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/biogeochem_tutorial/biogeochem.tex} |
|
|
|
|
|
\newpage |
|
|
\input{part3/case_studies/global_oce_estimation/global_oce_estimation.tex} |
|
|
|
|
|
\begin{versionprivate} |
|
|
\newpage |
|
|
\input{part3/case_studies/rotating_tank/tank.tex} |
|
|
\end{versionprivate} |
|