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Changeset 6396 for branches/2015/nemo_v3_6_STABLE/DOC/TexFiles/Chapters/Chap_DYN.tex – NEMO

# Changeset 6396 for branches/2015/nemo_v3_6_STABLE/DOC/TexFiles/Chapters/Chap_DYN.tex

Ignore:
Timestamp:
2016-03-18T14:56:37+01:00 (8 years ago)
Message:

Modification of the ISF documentation based on the comments from N. Jourdain

File:
1 edited

### Legend:

Unmodified
 r6317 \label{DYN_hpg_isf} Beneath an ice shelf, the total pressure gradient is the sum of the pressure gradient due to the ice shelf load and the pressure gradient due to the ocean load. If cavity opened (\np{ln\_isfcav}~=~true) these 2 terms can be calculated by setting \np{ln\_dynhpg\_isf}~=~true. No other scheme are working with the ice shelf.\\ $\bullet$ The main hypothesis to compute the ice shelf load is that the ice shelf is in an isostatic equilibrium. The top pressure is computed integrating from surface to the base of the ice shelf a reference density profile (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. This top pressure is constant over time. A detailed description of this method is described in \citet{Losch2008}.\\ the pressure gradient due to the ocean load. If cavities are present (\np{ln\_isfcav}~=~true) these two terms can be calculated by setting \np{ln\_dynhpg\_isf}~=~true. No other scheme is working with ice shelves.\\ $\bullet$ The main hypothesis to compute the ice shelf load is that the ice shelf is in isostatic equilibrium. The top pressure is computed integrating a reference density profile (prescribed as density of a water at 34.4 PSU and -1.9$\degres C$) from the sea surface to the ice shelf base, which corresponds to the load of the water column in which the ice shelf is floatting. This top pressure is constant over time. A detailed description of this method is described in \citet{Losch2008}.\\ $\bullet$ The ocean load is computed using the expression \eqref{Eq_dynhpg_sco} described in \ref{DYN_hpg_sco}. A treatment of the partial cell for top and bottom similar to the one described in \ref{DYN_hpg_zps} is done A treatment of the top and bottom partial cells similar to the one described in \ref{DYN_hpg_zps} is done to reduce the residual circulation generated by the top partial cell.