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| Titel |
Ocean deep convection in the Mediterranean sea: 2012-2013 case study in the Gulf of Lions, from observations to multi-scale modelling. |
| VerfasserIn |
Robin Waldman, Samuel Somot, Marine Herrmann, Florence Sevault, Guy Caniaux, Hervé Giordani, Pierre Testor, Claude Estournel |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250106446
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| Publikation (Nr.) |
 EGU/EGU2015-6119.pdf |
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| Zusammenfassung |
| Ocean deep convection is a major process of interaction between surface and deep ocean, it
indeed plays a major role in ocean heat and CO2 uptake in a warming climate, sea level rise
and nutrient storage for marine biology. In this study, ocean deep convection is
investigated in the Gulf of Lions, the main deep water formation (DWF) site in the
Western Mediterranean sea. Recent observations in the frame of MOOSE, HyMeX
and Mermex programmes allow for a thorough analysis of 2012-2013 convective
year.
The Mediterranean sea model NEMOMED12 (Â6km resolution) with its grid refinement
(Â2km) is used as a numerical tool to characterize and understand ocean deep convection in
2012-2013. The model is initialized on august 1st 2012 using an ensemble of gridded
reanalyses based on in situ observations (MOOSE 2012 ship cruise). The atmospheric forcing
ALADIN-Climate is a dynamical downscaling of the ERA-INTERIM reanalysis at 12km and
3hr resolution over the 2012-2013 period. Near-Atlantic ocean conditions are damped
towards ORAS4 reanalysis and river and Black Sea freshwater inflows are prescribed from
climatologies.
An assessment of large-scale convection is done for 2012-2013 year in NEMOMED12
and observations, allowing for a characterization of its chronology, intensity, location as well
as the hydrology of the main water masses involved.
This study addresses the respective impacts of atmospheric forcing, ocean preconditionning
and mesoscale resolution to deep convection. |
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