FN Archimer Export Format PT J TI Extended deep equatorial layering as a possible imprint of inertial instability BT AF D'ORGEVILLE, Marc HUA, Bach-Lien SCHOPP, Richard BUNGE, L AS 1:;2:;3:;4:; FF 1:PDG-DRO-DOPS-LPO;2:PDG-DRO-DOPS-LPO;3:;4:; C1 IFREMER, LPO, F-29280 Plouzane, France. IRD, LODYC, F-75252 Paris 05, France. C2 IFREMER, FRANCE IRD, FRANCE SI BREST SE PDG-DRO-DOPS-LPO IN WOS Ifremer jusqu'en 2018 IF 2.378 TC 14 TU Centre national de la recherche scientifique Institut de recherche pour le développement Institut français de recherche pour l'exploitation de la mer Muséum national d'histoire naturelle Université Pierre et Marie Curie Université de Bretagne Occidentale UR https://archimer.ifremer.fr/doc/00000/10892/9229.pdf LA English DT Article CR EQUALANT 2000 EQUALANT 99 PIRATA-FR06 PIRATA-FR08 BO Thalassa Le Suroît L'Atalante AB The deep equatorial track of the world ocean is subject to intense zonal flow fields that still remain to be better understood. Inertial instability has been invoked to explain some of its features. Here we present possible in situ imprints of such a mechanism in the equatorial Atlantic Ocean below the thermocline. We analyse the observed pattern of homogeneous density layers of 50 - 100 m vertical scale, which are characterized by a large meridional coherency up to 2degrees of latitude, a concentration in the vicinity of the equator and foremost a vertical localization within regions of well-mixed angular momentum ( westward jets). These distinctive properties suggest inertial instability to be a plausible mechanism for this extended layering. Numerical simulations forced by a time-oscillating shear reproduce the observed density layering characteristics. The prescription of deep jets in the background flow controls the vertical localization of the layering inside westward jets. PY 2004 PD NOV SO Geophysical Research Letters SN 0094-8276 PU Amer Geophysical Union VL 31 IS L22303 UT 000225399800002 BP 1 EP 5 DI 10.1029/2004GL020845 ID 10892 ER EF