| 48 | | - at initialisation or restart |
| 49 | | {{{ |
| 50 | | nemogcm |
| 51 | | --> nemoinit |
| 52 | | --> dominit |
| 53 | | --> domvvlread |
| 54 | | --> dom_vvl_zgr |
| 55 | | --> read e3t |
| 56 | | or |
| 57 | | --> compute e3t from ssh |
| 58 | | }}} |
| 59 | | |
| 60 | | |
| 61 | | |
| 62 | | |
| 63 | | NEMO's version 12377 implements scale factor computation at T-point with a leap frog integration or a filter and then interpolate scale factors at U-V-W-UW-VW-F-points from T-point through domvvl.F90 module. |
| 64 | | - at initialization or restart at all points |
| 65 | | - at time N+1 after sea surface time splitting integration and before the momentum integration at T-U-W-points |
| 66 | | - at time N after the sea surface asselin filtering at T-U-W-points |
| 67 | | - at the end of the time step after index switch F- and W-UW-VW-points are updated accordingly |
| 68 | | Because NEMO needs to take into account continuity issues, these modification are implemented under a cpp key key_qco for "quasi eulerian coordinate". When this key_qco is not activated NEMO should be exactly the same as the trunk. |
| | 48 | - at initialisation or restart at u-v-w-uw-vw-f-points |
| | 49 | {{{ |
| | 50 | nemogcm |
| | 51 | --> nemo_init |
| | 52 | --> dom_init |
| | 53 | --> dom_vvl_init |
| | 54 | --> dom_vvl_rst |
| | 55 | --> dom_vvl_zgr |
| | 56 | --> dom_vvl_interpol |
| | 57 | }}} |
| | 58 | - at each time step for "after" scale factor at u-v-points each time ssh[Naa] is computed |
| | 59 | {{{ |
| | 60 | nemogcm |
| | 61 | --> stp |
| | 62 | --> dom_vvl_sf_nxt |
| | 63 | --> e3t[Kaa] |
| | 64 | --> dom_vvl_interpol |
| | 65 | }}} |
| | 66 | - at each time step for "now" scale factor at u-v-points e3t is directly filtered |
| | 67 | {{{ |
| | 68 | nemogcm |
| | 69 | --> stp |
| | 70 | --> tra_atf |
| | 71 | --> e3t[Kmm] |
| | 72 | --> dyn_atf |
| | 73 | --> e3t[Kmm] |
| | 74 | --> dom_vvl_interpol |
| | 75 | }}} |
| | 76 | - at each time step after time swapping for "now" at f-point and "before" scale factor both at w-uw-vw-points |
| | 77 | {{{ |
| | 78 | nemogcm |
| | 79 | --> stp |
| | 80 | --> dom_vvl_sf_update |
| | 81 | --> dom_vvl_interpol |
| | 82 | }}} |
| | 83 | |
| | 84 | In version 1 we implement changes progressively and validate step by step regarding GYRE_PISCES test case. For backward compatibility we introduce a cpp key key_qco in order to isolate new scale factor implementation from former vvl version. qco stand for for "quasi eulerian coordinate". |
| | 85 | - new variables added in dom_oce and domain |
| | 86 | {{{ |
| | 87 | r3. with . = [t,u,v,f] are 2d in space ssh/hP0 |
| | 88 | }}} |
| | 89 | - new module in DOM : dom_qco |
| | 90 | {{{ |
| | 91 | -- dom_qco_r3c ! compute ssh/ht0 at t-point and interpolate ssh/h.0 at u-v-f-points from ssh |
| | 92 | -- dom_qco_zgr ! set ssh/ht0 at t-u-v-f-points for Kmm and at t-u-v-points for Kbb |
| | 93 | --> dom_qco_r3c[Kmm] at t-u-v-f-points |
| | 94 | --> dom_qco_r3c[Kbb] at t-u-v -points |
| | 95 | }}} |
| | 96 | - new substitute in DOM : domzgr_substitute |
| | 97 | When key_qco is active e3. is no longer a variable but an expression. |
| | 98 | Each time e3. appears in a routine an include domzgr_substitute in the module enables to replace it by a (e3._0 ( 1 + r3. ) * mask.) like expression. |
| | 99 | {{{ |
| | 100 | # define e3t(i,j,k,t) (e3t_0(i,j,k)*(1._wp+r3t(i,j,t)*tmask(i,j,k))) |
| | 101 | # define e3u(i,j,k,t) (e3u_0(i,j,k)*(1._wp+r3u(i,j,t)*umask(i,j,k))) |
| | 102 | # define e3v(i,j,k,t) (e3v_0(i,j,k)*(1._wp+r3v(i,j,t)*vmask(i,j,k))) |
| | 103 | # define e3f(i,j,k) (e3f_0(i,j,k)*(1._wp+r3f(i,j)*fmask(i,j,k))) |
| | 104 | # define e3w(i,j,k,t) (e3w_0(i,j,k)*(1._wp+r3t(i,j,t))) |
| | 105 | # define e3uw(i,j,k,t) (e3uw_0(i,j,k)*(1._wp+r3u(i,j,t))) |
| | 106 | # define e3vw(i,j,k,t) (e3vw_0(i,j,k)*(1._wp+r3v(i,j,t))) |
| | 107 | }}} |
| | 108 | - finally we extended the e3. modification to h. r1_h. and gde.. |
| | 109 | {{{ |
| | 110 | # define ht(i,j) (ht_0(i,j)+ssh(i,j,Kmm)) |
| | 111 | # define hu(i,j,t) (hu_0(i,j)*(1._wp+r3u(i,j,t))) |
| | 112 | # define hv(i,j,t) (hv_0(i,j)*(1._wp+r3v(i,j,t))) |
| | 113 | # define r1_hu(i,j,t) (r1_hu_0(i,j)/(1._wp+r3u(i,j,t))) |
| | 114 | # define r1_hv(i,j,t) (r1_hv_0(i,j)/(1._wp+r3v(i,j,t))) |
| | 115 | # define gdept(i,j,k,t) (gdept_0(i,j,k)*(1._wp+r3t(i,j,t))) |
| | 116 | # define gdepw(i,j,k,t) (gdepw_0(i,j,k)*(1._wp+r3t(i,j,t))) |
| | 117 | # define gde3w(i,j,k) (gdept_0(i,j,k)*(1._wp+r3t(i,j,Kmm))-ssh(i,j,Kmm)) |
| | 118 | }}} |
| | 119 | |
| | 120 | When this key_qco is not activated NEMO should be exactly the same as the trunk. |
| | 121 | |
| | 122 | |
| | 123 | Important points : |
| | 124 | - e3. expression involves tables of distinct dimension then e3.(:,:,:) call fails it may be necessary to introduce temporary variables (same for water height expression) |
| | 125 | - "e3. =" is no longer possible |
| | 126 | - e3t/u/v/f modifications did not introduce any difference in the results, e3w modification does because both approaches vvl and qco do not take into account of the bottom level in the same way |
| | 127 | - in GYRE e3w_0 are not the half sum of e3u_0 so the way it is implemented in the reference version is not convinient |
| | 128 | - e3. substitution makes lines longer than 136 character this may be a problem for compilers (most have been checked but not all) |
| | 129 | - ssh filtering has been displaced upper in order to provide filtered r3. in TOP asselin filtering |
| | 130 | - when key_qco is not active we pass SETTE and this version has been delivered for mid-merge party ! |
| | 131 | -- Some silly allocating memory bugs found and a not that silly bug in the implicit mode for SPITZ12 configuration. |
| | 132 | |
