Changeset 11578 for NEMO/trunk/doc/latex/NEMO/subfiles/chap_DYN.tex
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- 2019-09-19T19:44:36+02:00 (5 years ago)
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NEMO/trunk/doc/latex/NEMO/subfiles/chap_DYN.tex
r11577 r11578 327 327 A key point in \autoref{eq:DYN_een_e3f} is how the averaging in the \textbf{i}- and \textbf{j}- directions is made. 328 328 It uses the sum of masked t-point vertical scale factor divided either by the sum of the four t-point masks 329 (\np{nn_een_e3f}{nn\_een\_e3f}\forcode{=1}), or just by $4$ (\np{nn \_een\_e3f}\forcode{=.true.}).329 (\np{nn_een_e3f}{nn\_een\_e3f}\forcode{=1}), or just by $4$ (\np{nn_een_e3f}{nn\_een\_e3f}\forcode{=.true.}). 330 330 The latter case preserves the continuity of $e_{3f}$ when one or more of the neighbouring $e_{3t}$ tends to zero and 331 331 extends by continuity the value of $e_{3f}$ into the land areas. … … 904 904 In this particular exemple, 905 905 a boxcar averaging window over \np{nn_baro}{nn\_baro} barotropic time steps is used 906 (\np{nn \_bt\_flt}\forcode{=1}) and \np{nn_baro}{nn\_baro}\forcode{=5}.906 (\np{nn_bt_flt}{nn\_bt\_flt}\forcode{=1}) and \np{nn_baro}{nn\_baro}\forcode{=5}. 907 907 Internal mode time steps (which are also the model time steps) are denoted by 908 908 $t-\rdt$, $t$ and $t+\rdt$. … … 1265 1265 %------------------------------------------------------------------------------------------------------------- 1266 1266 1267 Options are defined through the \nam{zdf} namelist variables.1267 Options are defined through the \nam{zdf}{zdf} namelist variables. 1268 1268 The large vertical diffusion coefficient found in the surface mixed layer together with high vertical resolution implies that in the case of explicit time stepping there would be too restrictive a constraint on the time step. 1269 1269 Two time stepping schemes can be used for the vertical diffusion term: … … 1409 1409 flux is from a cell with water depth greater than \np{rn_wdmin1}{rn\_wdmin1} and 0 otherwise. If the user sets 1410 1410 \np{ln_wd_dl_ramp}{ln\_wd\_dl\_ramp}\forcode{=.true.} the flux across the face is ramped down as the water depth decreases 1411 from 2 * \np{rn_wdmin1}{rn\_wdmin1} to \np{rn \_wdmin1}. The use of this ramp reduced grid-scale noise in idealised test cases.1411 from 2 * \np{rn_wdmin1}{rn\_wdmin1} to \np{rn_wdmin1}{rn\_wdmin1}. The use of this ramp reduced grid-scale noise in idealised test cases. 1412 1412 1413 1413 At the point where the flux across a $u$-face is multiplied by zuwdmask , we have chosen … … 1649 1649 %------------------------------------------------------------------------------------------------------------- 1650 1650 1651 Options are defined through the \nam{dom} namelist variables.1651 Options are defined through the \nam{dom}{dom} namelist variables. 1652 1652 The general framework for dynamics time stepping is a leap-frog scheme, 1653 1653 \ie\ a three level centred time scheme associated with an Asselin time filter (cf. \autoref{chap:TD}).
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