CNRS 2017

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Additional NEMO ST members involved

Name	Institution	%	Position
Martin Vancoppenolle	CNRS LOCEAN-IPSL, Paris	10	CNRS
Laurent Debreu	IMAG, Grenoble	0	INRIA, AGRIF Working Group Leader
Marie-Alice Foujols	IPSL, Paris	0	CNRS
Rachid Benshila	LEGOS, Toulouse	0	CNRS

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Summaries from Actions forms

List of pages: CNRS-14_Merino-ICB, CNRS-1_Martin-LIM3PTRA

Action CNRS-1_Martin-LIM3PTRA Add generic passive tracer to LIM3 PI(S) Martin Vancoppenolle Digest In order to prepare a Biogeochemical compartment in sea ice, a generic passive tracer interface will be added in LIM3 Dependencies Depends on ... Target Priority or deadline Trac Ticket #XXXX SVN branch [source:/branches/2017WP/dev_r{REV}_{WG or INSTITUTE}-{NUM}_{PIS}-{KEYWORDS}] Previewer(s) Names Reviewer(s) Names Status Pending/In progress/Postponed/Ready Link ExtractUrl(.)?

Action CNRS-14_Merino ICB PI(S) Nacho Merino Digest Improve NEMO-ICM (icebergs) ocean column properties. Proposed modifications consists in considering the ocean column properties in the dynamics and thermodynamics parametrizations of the NEMO-ICB module: 1- In the computation of the ocean drag term for the iceberg dynamics equation we propose the use of the depth-integrated ocean velocity as described in equation 2.1 of Merino et al 2016, instead of considering the ocean surface velocity. In the situation where the submerged part of an iceberg is greater than the ocean bathymetry, the integrated velocity considers zero velocity for the part of the iceberg which is deeper than the ocean bathymetry. This parametrization has the effect of reducing the iceberg velocity when icebergs transit through shallow regions of the ocean. We have chosen not to stop or stuck icebergs in such situation since this has a strong impact in the iceberg distribution and it would require a representation of subgrid bathymetry. 2- For the computation of the basal turbulence melt rate term, we propose to consider the ocean temperature at the iceberg depth (equation 2.2 in Merino et al 2016) instead of the sea surface temperature. In cases where the submerged part of the iceberg is greater than the ocean bathymetry we propose to consider the ocean temperature at the ocean bathymetry depth. 3- For the buoyant convection term, we propose to integrate this term along the submerged part of the iceberg (equation 2.3 of Merino et al 2016), instead of only consider the ocean surface temperature. In cases where the submerged part of the iceberg is greater than the ocean bathymetry, the ocean temperature considered in the integral for the part of the iceberg which is found deeper than the ocean bathymetry (no temperature is defined deeper than the ocean bathymetry) is the temperature of the ocean at the bathymetry depth. Dependencies Depends on nothing Target Priority or deadline Trac Ticket #1900 SVN branch No need of specific branch: the code exist and has been tested and its use published Previewer(s) Tim Graham or Pierre Mathiot Reviewer(s) Tim Graham or Pierre Mathiot Status Ready & succesful : Incorporated in dev_merge_2017 in early January 2018 Link ExtractUrl(.)?