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Monitoring the Northern Current in the Gulf of Lions with an observing system simulation experiment

Monitoring the Northern Current in the Gulf of Lions with an observing system simulation experiment
Monitoring the Northern Current in the Gulf of Lions with an observing system simulation experiment
The coastal circulation in the Gulf of Lions (GoL) is influenced by the Northern Current (NC), forced by a complex wind system and also affected by important river discharges from the Rhône River. Correct modelling of this current is therefore important for obtaining a good representation of the gulf circulation. An observing system simulation experiment using the SEEK filter data assimilation method was used in a regional 1/16° configuration of the GoL in the NEMO model. The synthetic observation database used for the experiment comprised altimetric data in addition to in-situ temperature and salinity profiles. Statistical diagnostics and other physical criteria based on the improvement of NC representation were set up in order to assess the quality of this experiment. Comparisons between the free 1/16° simulation and the experience with assimilation show that data assimilation significantly improved the description of the characteristics of the NC as well as its seasonal and mesoscale variability, which in turn improved the description of the water exchanges between the coastal region and the open sea.
data assimilation, SEEK filter, OSSEs, Gulf of Lions, Northern Current, coastal processes, high-resolution modelling
0214-8358
441-453
Duchez, Aurélie
d73f2e60-bc41-4fb5-9686-6e12048a6f2d
Verron, Jacques
c3bc9331-29ba-403e-a157-e4adc614a85b
Brankart, Jean-Michel
f7e2d6b7-77ea-4b17-9b50-907b1eae18fb
Ourmières, Yann
231d7e12-72d2-4650-ac2d-af9857d741f6
Fraunié, Philippe
0998cf4a-bca1-4e6c-9df1-3f6f13b80a1c
Duchez, Aurélie
d73f2e60-bc41-4fb5-9686-6e12048a6f2d
Verron, Jacques
c3bc9331-29ba-403e-a157-e4adc614a85b
Brankart, Jean-Michel
f7e2d6b7-77ea-4b17-9b50-907b1eae18fb
Ourmières, Yann
231d7e12-72d2-4650-ac2d-af9857d741f6
Fraunié, Philippe
0998cf4a-bca1-4e6c-9df1-3f6f13b80a1c

Duchez, Aurélie, Verron, Jacques, Brankart, Jean-Michel, Ourmières, Yann and Fraunié, Philippe (2012) Monitoring the Northern Current in the Gulf of Lions with an observing system simulation experiment Scientia Marina, 76, (3), pp. 441-453. (doi:10.3989/scimar.03427.02D).

Record type: Article

Abstract

The coastal circulation in the Gulf of Lions (GoL) is influenced by the Northern Current (NC), forced by a complex wind system and also affected by important river discharges from the Rhône River. Correct modelling of this current is therefore important for obtaining a good representation of the gulf circulation. An observing system simulation experiment using the SEEK filter data assimilation method was used in a regional 1/16° configuration of the GoL in the NEMO model. The synthetic observation database used for the experiment comprised altimetric data in addition to in-situ temperature and salinity profiles. Statistical diagnostics and other physical criteria based on the improvement of NC representation were set up in order to assess the quality of this experiment. Comparisons between the free 1/16° simulation and the experience with assimilation show that data assimilation significantly improved the description of the characteristics of the NC as well as its seasonal and mesoscale variability, which in turn improved the description of the water exchanges between the coastal region and the open sea.

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More information

Published date: 2012
Keywords: data assimilation, SEEK filter, OSSEs, Gulf of Lions, Northern Current, coastal processes, high-resolution modelling
Organisations: Marine Physics and Ocean Climate

Identifiers

Local EPrints ID: 344891
URI: http://eprints.soton.ac.uk/id/eprint/344891
ISSN: 0214-8358
PURE UUID: 4ebb3e02-2d57-42fe-9c52-f7d6de0bcc58

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Date deposited: 05 Nov 2012 15:50
Last modified: 18 Jul 2017 05:13

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Contributors

Author: Aurélie Duchez
Author: Jacques Verron
Author: Jean-Michel Brankart
Author: Yann Ourmières
Author: Philippe Fraunié

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