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Assimilation of Argo float positions in the north western Mediterranean Sea and impact on ocean circulation simulations
Author(s) -
Taillandier V.,
Griffa A.,
Poulain P.M.,
Béranger K.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl025552
Subject(s) - argo , data assimilation , climatology , environmental science , context (archaeology) , oceanography , mediterranean sea , assimilation (phonology) , ocean current , structural basin , mediterranean climate , meteorology , geology , geography , archaeology , paleontology , linguistics , philosophy
Assimilation of Argo float trajectories (350m parking depth) in a high resolution model of the Mediterranean Sea has been performed to test the importance of this type of data for operational systems. Starting from a state corresponding to the 28th year of the simulation, two experiments were performed, one with assimilation and one without, during three months in winter 2005. Four Argo floats released in the context of the MFSTEP project are used. The results are very encouraging, showing significant and consistent changes in the ocean circulation. Comparison with independent data of transport through the Channel of Corsica indicates that the results are more realistic with assimilation, showing a non negligible impact of the assimilation process on the large scale circulation of the basin.