Changeset 6396
- Timestamp:
- 2016-03-18T14:56:37+01:00 (9 years ago)
- Location:
- branches/2015/nemo_v3_6_STABLE/DOC/TexFiles
- Files:
-
- 1 added
- 3 edited
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branches/2015/nemo_v3_6_STABLE/DOC/TexFiles/Chapters/Chap_DOM.tex
r6317 r6396 887 887 By default, misfdep(:,:)=1 and no cells are masked. 888 888 889 In case of ice shelf cavities , modifications of the model bathymetry and ice shelf draft into890 the cavities are performed in the \textit{zgr\_isf} routine. The compatibility between ice shelf draft and bathymetry is checked.891 If only one cell on the water column is opened at $t$-, $u$- or $v$-points, the bathymetry or the ice shelf draft is dug to fit this constrain. 892 If the incompatibility is too strong (need to dig more than 1 cell), the cellis masked.\\889 In case of ice shelf cavities (\np{ln\_isfcav}~=~true), modifications of the model bathymetry and ice shelf draft in 890 the cavities are performed through the \textit{zgr\_isf} routine. The compatibility between ice shelf draft and bathymetry is checked: 891 if only one cell on the water column is opened at $t$-, $u$- or $v$-points, the bathymetry or the ice shelf draft is dug to have a 2-level water column 892 (i.e. two unmasked levels). If the incompatibility is too strong (i.e. need to dig more than one cell), the entire water column is masked.\\ 893 893 894 894 From the \textit{mbathy} array, the mask fields are defined as follows: -
branches/2015/nemo_v3_6_STABLE/DOC/TexFiles/Chapters/Chap_DYN.tex
r6317 r6396 655 655 \label{DYN_hpg_isf} 656 656 Beneath an ice shelf, the total pressure gradient is the sum of the pressure gradient due to the ice shelf load and 657 the pressure gradient due to the ocean load. If cavity opened (\np{ln\_isfcav}~=~true) these 2 terms can be 658 calculated by setting \np{ln\_dynhpg\_isf}~=~true. No other scheme are working with the ice shelf.\\ 659 660 $\bullet$ The main hypothesis to compute the ice shelf load is that the ice shelf is in an isostatic equilibrium. 661 The top pressure is computed integrating from surface to the base of the ice shelf a reference density profile 662 (prescribed as density of a water at 34.4 PSU and -1.9$\degres C$) and corresponds to the water replaced by the ice shelf. 663 This top pressure is constant over time. A detailed description of this method is described in \citet{Losch2008}.\\ 657 the pressure gradient due to the ocean load. If cavities are present (\np{ln\_isfcav}~=~true) these two terms can be 658 calculated by setting \np{ln\_dynhpg\_isf}~=~true. No other scheme is working with ice shelves.\\ 659 660 $\bullet$ The main hypothesis to compute the ice shelf load is that the ice shelf is in isostatic equilibrium. 661 The top pressure is computed integrating a reference density profile (prescribed as density of a water at 34.4 662 PSU and -1.9$\degres C$) from the sea surface to the ice shelf base, which corresponds to the load of the water 663 column in which the ice shelf is floatting. This top pressure is constant over time. A detailed description of 664 this method is described in \citet{Losch2008}.\\ 664 665 665 666 $\bullet$ The ocean load is computed using the expression \eqref{Eq_dynhpg_sco} described in \ref{DYN_hpg_sco}. 666 A treatment of the partial cell for top and bottomsimilar to the one described in \ref{DYN_hpg_zps} is done667 A treatment of the top and bottom partial cells similar to the one described in \ref{DYN_hpg_zps} is done 667 668 to reduce the residual circulation generated by the top partial cell. 668 669 -
branches/2015/nemo_v3_6_STABLE/DOC/TexFiles/Chapters/Chap_SBC.tex
r6350 r6396 948 948 \namdisplay{namsbc_isf} 949 949 %-------------------------------------------------------------------------------------------------------- 950 Namelist variable in \ngn{namsbc}, \np{nn\_isf}, controls the ice shelf representation used. 950 Namelist variable in \ngn{namsbc}, \np{nn\_isf}, controls the ice shelf representation used (Fig. \ref{Fig_SBC_isf}): 951 952 %>>>>>>>>>>>>>>>>>>>>>>>>>>>> 953 \begin{figure}[!h] \begin{center} 954 \includegraphics[width=0.8\textwidth]{./TexFiles/Figures/Fig_SBC_isf.pdf} 955 \caption{ \label{Fig_SBC_isf} 956 Schematic for all the options available trough \np{nn\_isf}.} 957 \end{center} \end{figure} 958 %>>>>>>>>>>>>>>>>>>>>>>>>>>>> 959 951 960 \begin{description} 961 \item[\np{nn\_isf}~=~0] 962 The ice shelf routines are not used. The ice shelf melting is not computed or prescribed, the cavity have to be closed. 963 If needed, the ice shelf melting should be added to the runoff or the precipitation file. 964 952 965 \item[\np{nn\_isf}~=~1] 953 966 The ice shelf cavity is represented. The fwf and heat flux are computed. Two different bulk formula are available: … … 1002 1015 $\bullet$ \np{nn\_isf}~=~1 and \np{nn\_isf}~=~2 compute a melt rate based on the water mass properties, ocean velocities and depth. 1003 1016 This flux is thus highly dependent of the model resolution (horizontal and vertical), realism of the water masses onto the shelf ...\\ 1004 1005 1017 1006 1018 $\bullet$ \np{nn\_isf}~=~3 and \np{nn\_isf}~=~4 read the melt rate from a file. You have total control of the fwf forcing.
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