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 20190108T13:10:10+01:00 (5 years ago)
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NEMO/branches/UKMO/dev_r10448_bdyvol/doc/latex/NEMO/subfiles/chap_LBC.tex
r10442 r10470 613 613 \label{subsec:BDY_vol_corr} 614 614 615 There is an option to force the total volume in the regional model to be constant ,616 similar to the option in the OBC module.617 This is controlled by the \np{nn\_volctl} parameter in the namelist.618 A value of \np{nn\_volctl}\forcode{ = 0} indicates that this option is not used. 619 If \np{nn\_volctl}\forcode{ = 1} then a correction is applied to the normalvelocities around the boundary at615 There is an option to force the total volume in the regional model to be constant. 616 This is controlled by the \np{ln\_vol} parameter in the namelist. 617 A value of \np{ln\_vol}\forcode{ = .false.} indicates that this option is not used. 618 Two options to control the volume are available (\np{nn\_volctl}). 619 If \np{nn\_volctl}\forcode{ = 0} then a correction is applied to the normal barotropic velocities around the boundary at 620 620 each timestep to ensure that the integrated volume flow through the boundary is zero. 621 If \np{nn\_volctl}\forcode{ = 2} then the calculation of the volume change on621 If \np{nn\_volctl}\forcode{ = 1} then the calculation of the volume change on 622 622 the timestep includes the change due to the freshwater flux across the surface and 623 623 the correction velocity corrects for this as well.
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