Changeset 10414 for NEMO/trunk/doc/latex/NEMO/subfiles/chap_STO.tex
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- 2018-12-19T00:02:00+01:00 (5 years ago)
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NEMO/trunk/doc/latex/NEMO/subfiles/chap_STO.tex
r10354 r10414 1 \documentclass[../tex_main/NEMO_manual]{subfiles} 1 \documentclass[../main/NEMO_manual]{subfiles} 2 2 3 \begin{document} 3 4 % ================================================================ … … 13 14 \newpage 14 15 15 16 16 The stochastic parametrization module aims to explicitly simulate uncertainties in the model. 17 17 More particularly, \cite{Brankart_OM2013} has shown that, … … 23 23 The stochastic formulation of the equation of state can be written as: 24 24 \begin{equation} 25 \label{eq:eos_sto}25 \label{eq:eos_sto} 26 26 \rho = \frac{1}{2} \sum_{i=1}^m\{ \rho[T+\Delta T_i,S+\Delta S_i,p_o(z)] + \rho[T-\Delta T_i,S-\Delta S_i,p_o(z)] \} 27 27 \end{equation} … … 30 30 the scalar product of the respective local T/S gradients with random walks $\mathbf{\xi}$: 31 31 \begin{equation} 32 \label{eq:sto_pert}33 \Delta T_i = \mathbf{\xi}_i \cdot \nabla T \qquad \hbox{and} \qquad \Delta S_i = \mathbf{\xi}_i \cdot \nabla S32 \label{eq:sto_pert} 33 \Delta T_i = \mathbf{\xi}_i \cdot \nabla T \qquad \hbox{and} \qquad \Delta S_i = \mathbf{\xi}_i \cdot \nabla S 34 34 \end{equation} 35 35 $\mathbf{\xi}_i$ are produced by a first-order autoregressive processes (AR-1) with … … 53 53 54 54 \begin{equation} 55 \label{eq:autoreg}56 \xi^{(i)}_{k+1} = a^{(i)} \xi^{(i)}_k + b^{(i)} w^{(i)} + c^{(i)}55 \label{eq:autoreg} 56 \xi^{(i)}_{k+1} = a^{(i)} \xi^{(i)}_k + b^{(i)} w^{(i)} + c^{(i)} 57 57 \end{equation} 58 58 … … 67 67 and the parameters $a^{(i)}$, $b^{(i)}$, $c^{(i)}$ are given by: 68 68 69 \begin{equation} 70 \label{eq:ord1} 71 \left\{ 72 \begin{array}{l} 73 a^{(i)} = \varphi \\ 74 b^{(i)} = \sigma^{(i)} \sqrt{ 1 - \varphi^2 } 75 \qquad\qquad\mbox{with}\qquad\qquad 76 \varphi = \exp \left( - 1 / \tau^{(i)} \right) \\ 77 c^{(i)} = \mu^{(i)} \left( 1 - \varphi \right) \\ 78 \end{array} 79 \right. 80 \end{equation} 69 \[ 70 % \label{eq:ord1} 71 \left\{ 72 \begin{array}{l} 73 a^{(i)} = \varphi \\ 74 b^{(i)} = \sigma^{(i)} \sqrt{ 1 - \varphi^2 } \qquad\qquad\mbox{with}\qquad\qquad \varphi = \exp \left( - 1 / \tau^{(i)} \right) \\ 75 c^{(i)} = \mu^{(i)} \left( 1 - \varphi \right) \\ 76 \end{array} 77 \right. 78 \] 81 79 82 80 \item … … 86 84 and the parameters $a^{(i)}$, $b^{(i)}$, $c^{(i)}$ are given by: 87 85 88 \begin{equation}89 \label{eq:ord2}90 \left\{91 \begin{array}{l}92 a^{(i)} = \varphi \\93 b^{(i)} = \frac{n-1}{2(4n-3)} \sqrt{ 1 - \varphi^2 } 94 \qquad\qquad\mbox{with}\qquad\qquad95 \varphi = \exp \left( - 1 / \tau^{(i)} \right) \\96 c^{(i)} = \mu^{(i)} \left( 1 - \varphi \right) \\97 \end{array}98 \right.99 \end{equation}86 \begin{equation} 87 \label{eq:ord2} 88 \left\{ 89 \begin{array}{l} 90 a^{(i)} = \varphi \\ 91 b^{(i)} = \frac{n-1}{2(4n-3)} \sqrt{ 1 - \varphi^2 } 92 \qquad\qquad\mbox{with}\qquad\qquad 93 \varphi = \exp \left( - 1 / \tau^{(i)} \right) \\ 94 c^{(i)} = \mu^{(i)} \left( 1 - \varphi \right) \\ 95 \end{array} 96 \right. 97 \end{equation} 100 98 101 99 \end{itemize} … … 173 171 $i.e.$ when the state of the random number generator is read in the restart file. 174 172 173 \biblio 175 174 176 175 \end{document}
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