/[MITgcm]/MITgcm/pkg/generic_advdiff/GAD_OPTIONS.h
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Contents of /MITgcm/pkg/generic_advdiff/GAD_OPTIONS.h

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Revision 1.6 - (show annotations) (download)
Tue Apr 4 14:12:19 2006 UTC (18 years, 1 month ago) by mlosch
Branch: MAIN
CVS Tags: checkpoint58f_post, checkpoint58d_post, checkpoint58t_post, checkpoint58m_post, checkpoint58o_post, checkpoint58p_post, checkpoint58q_post, checkpoint58e_post, mitgcm_mapl_00, checkpoint58r_post, checkpoint58n_post, checkpoint58k_post, checkpoint58l_post, checkpoint58g_post, checkpoint58h_post, checkpoint58j_post, checkpoint58i_post, checkpoint58u_post, checkpoint58s_post
Changes since 1.5: +10 -4 lines
File MIME type: text/plain
add comments about ISOTROPIC_COS_SCALING and COSINEMETH_III in an
effort to minimize the confusion about this topic

1 C $Header: /u/gcmpack/MITgcm/pkg/generic_advdiff/GAD_OPTIONS.h,v 1.5 2003/10/09 04:19:19 edhill Exp $
2 C $Name: $
3
4 CBOP
5 C !ROUTINE: GAD_OPTIONS.h
6
7 C !INTERFACE:
8 C #include "GAD_OPTIONS.h"
9
10 C !DESCRIPTION:
11 C Contains CPP macros/flags for controlling optional features of package.
12 CEOP
13
14 C CPP options file for GAD (Generic Advection Diffusion) package
15 C
16 C Use this file for selecting options within the GAD package
17
18 #ifndef GAD_OPTIONS_H
19 #define GAD_OPTIONS_H
20 #include "PACKAGES_CONFIG.h"
21 #ifndef DISABLE_GENERIC_ADVDIFF
22
23 #include "CPP_OPTIONS.h"
24
25 C This flag selects the form of COSINE(lat) scaling of bi-harmonic term.
26 C *only for use on a lat-lon grid*
27 C Setting this flag here only affects the bi-harmonic tracer terms; to
28 C use COSINEMETH_III in the momentum equations set it CPP_OPTIONS.h
29 #define COSINEMETH_III
30
31 C This selects isotropic scaling of harmonic and bi-harmonic term when
32 C using the COSINE(lat) scaling.
33 C Setting this flag here only affects the tracer diffusion terms; to
34 C use ISOTROPIC_COS_SCALING of the horizontal viscosity terms in the
35 C momentum equations set it CPP_OPTIONS.h; the following line
36 C even overrides setting the flag in CPP_OPTIONS.h
37 #undef ISOTROPIC_COS_SCALING
38
39 C As of checkpoint41, the inclusion of multi-dimensional advection
40 C introduces excessive recomputation/storage for the adjoint.
41 C We can disable it here using CPP because run-time flags are insufficient.
42 #undef DISABLE_MULTIDIM_ADVECTION
43
44 #else
45
46 C If GAD is disabled then so is multi-dimensional advection
47 #define DISABLE_MULTIDIM_ADVECTION
48
49 #endif /* DISABLE_GENERIC_ADVDIFF */
50 #endif /* GAD_OPTIONS_H */

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