@article{fdi:010051111, title = {{B}arotropic zonal jets induced by islands in the southwest {P}acific}, author = {{C}ouvelard, {X}avier and {M}archesiello, {P}atrick and {G}ourdeau, {L}ionel and {L}ef{\`e}vre, {J}{\'e}r{\^o}me}, editor = {}, language = {{ENG}}, abstract = {{T}he oceanic circulation entering the tropical southwest {P}acific ({SWP}) is dominated by the broad west- ward flow of the {S}outh {E}quatorial {C}urrent ({SEC}), which is forced by the trade winds. {I}t has been argued that the numerous islands of the {SWP} are able to restructure the {SEC} into a series of deep and narrow zonal jets, which control important pathways connecting equatorial and extraequatorial signals. {T}he primary objective of this paper is to improve the understanding of the structure and dynamics of {SWP} zonal jets, giving special attention to topographic effects. {T}his study is based on the use of a high-resolution regional oceanic model, whose solution is compared with observations, as well as with solutions from global models and the {S}verdrup relation. {T}he model used here indicates that the regional topography drives a general equatorward shift of the {SEC}, which is beneficial to the {N}orth {F}iji, {N}orth {V}anuatu, and {N}orth {C}aledonian jets. {A} depth-integrated vorticity budget shows that this topographic effect is considerably attenuated by baroclinicity and advection processes, but not to the point of total compensation as often admitted for the interior ocean. {T}he effect of nonlinear advection is to allow flow rectification of the jets fluctuations, taking the form of zonally elongated dipole circulations in the leeward side of the islands.}, keywords = {{CIRCULATION} {OCEANIQUE} ; {SOUS} {COURANT} ; {THERMOCLINE} ; {TOPOGRAPHIE} ; {ADVECTION} ; {VARIATION} {SAISONNIERE} ; {MODELE} ; {PACIFIQUE} {SUD} {OUEST}}, booktitle = {}, journal = {{J}ournal of {P}hysical {O}ceanography}, volume = {38}, numero = {10}, pages = {2185--2204}, ISSN = {1520-0485}, year = {2008}, DOI = {10.1175/2008{JPO}3903.1}, URL = {https://www.documentation.ird.fr/hor/fdi:010051111}, }