FN Archimer Export Format
PT J
TI Observations of Layering under a Warm-Core Ring in the Gulf of Mexico
BT 
AF MEUNIER, Thomas
   PALLAS SANZ, Enric
   TENREIRO, Miguel
   OCHOA, Jose
   ANGULO, Angel Ruiz
   BUCKINGHAM, Christian
AS 1:1;2:1;3:1;4:1;5:2;6:3;
FF 1:;2:;3:;4:;5:;6:;
C1 Ctr Invest Cient & Educ Super Ensenada, Phys Oceanog Dept, Ensenada, Baja California, Mexico.
   Iceland Meteorol Off, Reykjavik, Iceland.
   Inst Univ Europeen Mer, Lab Oceanog Phys & Spatiale, Plouzane, France.
C2 CICESE, MEXICO
   ICELAND METEOROL OFF, ICELAND
   UBO, FRANCE
UM LOPS
IN WOS Cotutelle UMR
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 3.318
TC 12
UR https://archimer.ifremer.fr/doc/00600/71242/69612.pdf
LA English
DT Article
DE ;Eddies;Mesoscale processes;Small scale processes;In situ oceanic observations;Quasigeostrophic models;Tracers
AB Two glider transects in the Gulf of Mexico reveal fine-vertical-scale thermohaline structures within a Loop Current eddy (LCE). Partially compensating temperature and salinity anomalies are shown to organize as thin layers below the eddy and near its edges. The anomalies have vertical scales ranging from 2 to 60 m and extend laterally over distances up to 120 km. These structures are evident in synthetic acoustic reflectivity derived from the glider data and are reminiscent of the intense layering observed in seismic imagery around meddies, Agulhas rings, and warm-core Kuroshio rings. The observed layers are aligned with the geostrophic streamfunction rather than isopycnals and develop preferentially in zones of intense vertical shear. These observations suggest that tracer stirring by the eddy's vertically sheared azimuthal flow might be an important process for their generation. In an attempt to rationalize this process, high-resolution quasigeostrophic simulations were performed using an idealized anticyclonic ring for the initial conditions. As the vortex destabilizes, layering rapidly develops in the model, resulting in structures similar to those found in the observation data. Passive tracer experiments also suggest that the layers form through differential advection of the tracer field by the vertically sheared flow associated with the LCE. 
PY 2019
PD DEC
SO Journal Of Physical Oceanography
SN 0022-3670
PU Amer Meteorological Soc
VL 49
IS 12
UT 000501807300001
BP 3145
EP 3162
DI 10.1175/JPO-D-18-0138.1
ID 71242
ER

EF