Changeset 2381
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- 2010-11-13T12:09:27+01:00 (13 years ago)
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branches/nemo_v3_3_beta/DOC/TexFiles/Chapters/Chap_CFG.tex
r2376 r2381 41 41 The 1D model is a very useful tool 42 42 \textit{(a)} to learn about the physics and numerical treatment of vertical mixing processes ; 43 \textit{(b)} to investigate suitable parameterisations of unresolved turbulence ( wind steering,44 langmuir circulation, skin layers, ...) ;43 \textit{(b)} to investigate suitable parameterisations of unresolved turbulence (surface wave 44 breaking, Langmuir circulation, ...) ; 45 45 \textit{(c)} to compare the behaviour of different vertical mixing schemes ; 46 46 \textit{(d)} to perform sensitivity studies on the vertical diffusion at a particular point of an ocean domain ; … … 51 51 with some extra routines. There is no need to define a new mesh, bathymetry, 52 52 initial state or forcing, since the 1D model will use those of the configuration it is a zoom of. 53 The chosen grid point is set in par\_oce.F90 module by setting the jpizoom and jpjzoom53 The chosen grid point is set in par\_oce.F90 module by setting the \jp{jpizoom} and \jp{jpjzoom} 54 54 parameters to the indices of the location of the chosen grid point. 55 55 56 The 1D model has some specifies. First, all the horizontal derivatives are assumed to be zero. 57 Therefore a simplified \rou{step} routine is used (\rou{step\_c1d}) in which both lateral tendancy 58 terms and lateral physics are not called, and the vertical velocity is zero (so far, no attempt at 59 introducing a Ekman pumping velocity has been made). 60 Second, the two components of the velocity are moved on a $T$-point. 61 This requires a specific treatment of the Coriolis term (see \rou{dyncor\_c1d}) and of the 62 dynamic time stepping (\rou{dynnxt\_c1d}). 63 All the relevant modules can be found in the NEMOGCM/NEMO/C1D\_SRC directory of 64 the \NEMO distribution. 65 66 % to be added: a test case on the yearlong Ocean Weather Station (OWS) Papa dataset of Martin (1985) 56 67 57 68 % ================================================================ … … 64 75 the LIM sea-ice model (ORCA-LIM) and possibly with PISCES biogeochemical model 65 76 (ORCA-LIM-PISCES), using various resolutions. 77 78 79 %>>>>>>>>>>>>>>>>>>>>>>>>>>>> 80 \begin{figure}[!t] \begin{center} 81 \includegraphics[width=0.98\textwidth]{./TexFiles/Figures/Fig_ORCA_NH_mesh.pdf} 82 \caption{ \label{Fig_MISC_ORCA_msh} 83 ORCA mesh conception. The departure from an isotropic Mercator grid start poleward of 20\deg N. 84 The two "north pole" are the foci of a series of embedded ellipses (blue curves) 85 which are determined analytically and form the i-lines of the ORCA mesh (pseudo latitudes). 86 Then, following \citet{Madec_Imbard_CD96}, the normal to the series of ellipses (red curves) is computed 87 which provide the j-lines of the mesh (pseudo longitudes). } 88 \end{center} \end{figure} 89 %>>>>>>>>>>>>>>>>>>>>>>>>>>>> 66 90 67 91 % ------------------------------------------------------------------------------------------------------------- … … 80 104 either the mesh lines or the scale factors, or even the scale factor derivatives over the whole 81 105 ocean domain, as the mesh is not a composite mesh. 106 %>>>>>>>>>>>>>>>>>>>>>>>>>>>> 107 \begin{figure}[!tbp] \begin{center} 108 \includegraphics[width=1.0\textwidth]{./TexFiles/Figures/Fig_ORCA_NH_msh05_e1_e2.pdf} 109 \includegraphics[width=0.80\textwidth]{./TexFiles/Figures/Fig_ORCA_aniso.pdf} 110 \caption { \label{Fig_MISC_ORCA_e1e2} 111 \textit{Top}: Horizontal scale factors ($e_1$, $e_2$) and 112 \textit{Bottom}: ratio of anisotropy ($e_1 / e_2$) 113 for ORCA 0.5\deg ~mesh. South of 20\deg N a Mercator grid is used ($e_1 = e_2$) 114 so that the anisotropy ratio is 1. Poleward of 20\deg N, the two "north pole" 115 introduce a weak anisotropy over the ocean areas ($< 1.2$) except in vicinity of Victoria Island 116 (Canadian Arctic Archipelago). } 117 \end{center} \end{figure} 118 %>>>>>>>>>>>>>>>>>>>>>>>>>>>> 119 82 120 83 121 The method is applied to Mercator grid ($i.e.$ same zonal and meridional grid spacing) poleward … … 93 131 in the Canadian Archipelago. 94 132 95 96 %>>>>>>>>>>>>>>>>>>>>>>>>>>>>97 \begin{figure}[!t] \begin{center}98 \includegraphics[width=0.98\textwidth]{./TexFiles/Figures/Fig_ORCA_NH_mesh.pdf}99 \caption{ \label{Fig_MISC_ORCA_msh}100 ORCA mesh conception. The departure from an isotropic Mercator grid start poleward of 20\deg N.101 The two "north pole" are the foci of a series of embedded ellipses (blue curves)102 which are determined analytically and form the i-lines of the ORCA mesh (pseudo latitudes).103 Then, following \citet{Madec_Imbard_CD96}, the normal to the series of ellipses (red curves) is computed104 which provide the j-lines of the mesh (pseudo longitudes). }105 \end{center} \end{figure}106 %>>>>>>>>>>>>>>>>>>>>>>>>>>>>107 108 109 %>>>>>>>>>>>>>>>>>>>>>>>>>>>>110 \begin{figure}[!tbp] \begin{center}111 \includegraphics[width=1.0\textwidth]{./TexFiles/Figures/Fig_ORCA_NH_msh05_e1_e2.pdf}112 \includegraphics[width=0.80\textwidth]{./TexFiles/Figures/Fig_ORCA_aniso.pdf}113 \caption { \label{Fig_MISC_ORCA_e1e2}114 \textit{Top}: Horizontal scale factors ($e_1$, $e_2$) and115 \textit{Bottom}: ratio of anisotropy ($e_1 / e_2$)116 for ORCA 0.5\deg ~mesh. South of 20\deg N a Mercator grid is used ($e_1 = e_2$)117 so that the anisotropy ratio is 1. Poleward of 20\deg N, the two "north pole"118 introduce a weak anisotropy over the ocean areas ($< 1.2$) except in vicinity of Victoria Island119 (Canadian Arctic Archipelago). }120 \end{center} \end{figure}121 %>>>>>>>>>>>>>>>>>>>>>>>>>>>>122 123 124 125 133 % ------------------------------------------------------------------------------------------------------------- 126 134 % ORCA-LIM(-PISCES) configurations 127 135 % ------------------------------------------------------------------------------------------------------------- 128 \subsection{ORCA-LIM(-PISCES) configurations} 129 \label{CFG_orca_grid} 130 131 132 The NEMO system is provided with four built-in ORCA configurations which differ in the 133 horizontal resolution 134 \footnote{the value of the resolution is given by the resolution at the Equator expressed in degrees.} 135 used: 136 \begin{description} 137 \item[\key{orca\_r4}] \jp{cp\_cfg}~=~orca ; \jp{jp\_cfg}~=~4 138 \item[\key{orca\_r2}] \jp{cp\_cfg}~=~orca ; \jp{jp\_cfg}~=~2 139 %\item[\key{orca\_r1}] \jp{cp\_cfg}~=~orca ; \jp{jp\_cfg}~=~1 140 \item[\key{orca\_r05}] \jp{cp\_cfg}~=~orca ; \jp{jp\_cfg}~=~05 141 \item[\key{orca\_r025}] \jp{cp\_cfg}~=~orca ; \jp{jp\_cfg}~=~025 142 \end{description} 136 \subsection{ORCA pre-defined resolution} 137 \label{CFG_orca_resolution} 138 139 140 The NEMO system is provided with five built-in ORCA configurations which differ in the 141 horizontal resolution. The value of the resolution is given by the resolution at the Equator 142 expressed in degrees. Each of configuration is set through a CPP key with set the grid size 143 and configuration name parameters (Tab.~\ref{Tab_ORCA}). 144 . 145 146 %--------------------------------------------------TABLE-------------------------------------------------- 147 \begin{table}[!b] \begin{center} 148 \begin{tabular}{p{4cm} c c c c} 149 CPP key & \jp{jp\_cfg} & \jp{jpiglo} & \jp{jpiglo} & \\ 150 \hline \hline 151 \key{orca\_r4} & 4 & 92 & 76 & \\ 152 \key{orca\_r2} & 2 & 182 & 149 & \\ 153 \key{orca\_r1} & 1 & 362 & 292 & \\ 154 \key{orca\_r05} & 05 & 722 & 511 & \\ 155 \key{orca\_r025} & 025 & 1442 & 1021 & \\ 156 %\key{orca\_r8} & 8 & 2882 & 2042 & \\ 157 %\key{orca\_r12} & 12 & 4322 & 3062 & \\ 158 \hline \hline 159 \end{tabular} 160 \caption{ \label{Tab_ORCA} 161 Set of predefined parameters for ORCA family configurations. 162 In all cases, the name of the configuration is set to "orca" ($i.e.$ \jp{cp\_cfg}~=~orca). } 163 \end{center} 164 \end{table} 165 %-------------------------------------------------------------------------------------------------------------- 166 143 167 144 168 The ORCA\_R2 configuration has the following specificity : starting from a 2\deg~ORCA mesh, … … 151 175 and R1 strongly increases the mesh anisotropy there. 152 176 153 The ORCA\_R05 configuration and higher ones does not incorporate any regional refinements. 177 The ORCA\_R05 and higher global configurations do not incorporate any regional refinements. 178 179 For ORCA\_R1 and R025, setting the configuration key to 75 allows to use 75 vertical levels, 180 otherwise 46 are used. In the other ORCA configurations, 31 levels are used 181 (see Tab.~\ref{Tab_orca_zgr} and Fig.~\ref{Fig_zgr}). 154 182 155 183 Only the ORCA\_R2 is provided with all its input files in the \NEMO distribution. … … 159 187 160 188 This version of ORCA\_R2 has 31 levels in the vertical, with the highest resolution (10m) 161 in the upper 150m . The bottom topography and the coastlines are derived162 from the global atlas of Smith and Sandwell (1997). The default forcing employ the boundary163 forcing from \citet{Large_Yeager_Rep04} (see \S\ref{SBC_blk_core}),189 in the upper 150m (see Tab.~\ref{Tab_orca_zgr} and Fig.~\ref{Fig_zgr}). 190 The bottom topography and the coastlines are derived from the global atlas of Smith and Sandwell (1997). 191 The default forcing employ the boundary forcing from \citet{Large_Yeager_Rep04} (see \S\ref{SBC_blk_core}), 164 192 which was developed for the purpose of running global coupled ocean-ice simulations 165 193 without an interactive atmosphere. This \citet{Large_Yeager_Rep04} dataset is available … … 169 197 170 198 The vertical resolution can be increased by a factor of 10 by defining the \key{orca\_lev10} CPP key. 171 It can also be run with an AGRIF zoom over the Agulhas current area ( \key{agrif} defined). 172 Also available are to keys, \key{arctic} and \key{antarctic}, which allows to run a regional Arctic 173 or peri-Antarctic configuration extracted from an ORCA configuration. (This does not work with ORCA\_R4 and R1). 174 175 176 %--------------------------------------------------TABLE-------------------------------------------------- 177 \begin{table}[htbp] \begin{center} 178 \begin{tabular}{ccccc} 179 key & \jp{jp\_cfg} & \jp{jpiglo} & \jp{jpiglo} & \\ 180 \hline \hline 181 \key{orca\_r4} & 4 & 92 & 76 & \\ 182 \key{orca\_r2} & 2 & 182 & 149 & \\ 183 %\key{orca\_r1} & 1 & 362 & 511 & \\ 184 \key{orca\_r05} & 05 & 722 & 261 & \\ 185 \key{orca\_r025} & 025 & 1442 & 1021 & \\ 186 %\key{orca\_r8} & 8 & 2882 & 2042 & \\ 187 %\key{orca\_r12} & 12 & 4322 & 3062 & \\ 188 \hline 189 \hline 190 \end{tabular} 191 \caption{ \label{Tab_ORCA} 192 Set of predefined ORCA parameters. } 193 \end{center} 194 \end{table} 195 %-------------------------------------------------------------------------------------------------------------- 196 199 ORCA\_R2 can also be run with an AGRIF zoom over the Agulhas current area ( \key{agrif} defined) 200 and, by setting the key \key{arctic} or \key{antarctic}, a regional Arctic or peri-Antarctic configuration 201 is extracted from an ORCA\_R2 or R05 configurations. 197 202 198 203 % -------------------------------------------------------------------------------------------------------------
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