FN Archimer Export Format
PT J
TI Evolution of Intermediate Water Masses Based on Argo Float Displacements
BT 
AF SEVELLEC, Florian
   COLIN DE VERDIERE, Alain
   OLLITRAULT, Michel
AS 1:1;2:2;3:3;
FF 1:;2:;3:PDG-ODE-LOPS-OH;
C1 Univ Southampton, Ocean & Earth Sci, Southampton, Hants, England.
   UBO, Lab Oceanog Phys & Spatiale, UMR 6523, CNRS,IFREMER,IRD, Brest, France.
   UBO, Lab Oceanog Phys & Spatiale, UMR 6523, CNRS,IFREMER,IRD, Brest, France
C2 UNIV SOUTHAMPTON, UK
   UBO, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.086
TC 10
UR https://archimer.ifremer.fr/doc/00393/50450/51180.pdf
LA English
DT Article
DE ;Dynamics;Large-scale motions;In situ oceanic observations;Statistical techniques;Ocean models
AB The evolution and dispersion of intermediate water masses in the ocean interior is studied. To this purpose, an empirical statistical model of Lagrangian tracers at a constant depth level is developed. The model follows the transfer operator based on 10-day deep displacements of Argo floats at; similar to 1000m depth. An asymptotic analysis of the model shows the existence of 10 principal stationary points (the 10 locations attract asymptotically 97% of the tracers). It takes; 1000 years to reach this asymptotic regime relevant for estimating the stationary points. For Lagrangian floats, the concept of attractor needs to be generalized in a statistical sense (versus deterministic), except for a few places in the ocean. In this new framework, a tracer has a likelihood to reach the stationary points, rather than a certainty to reach a single stationary point. The empirical statistical model is used to describe the fate of three intermediate water masses: North Pacific Intermediate Water (NPIW), Mediterranean Water (MW), and Antarctic Intermediate Water (AAIW). These experiments show a dramatic difference in the long-time behavior of NPIW, MW, and AAIW. In the permanent regime, the NPIW concentrates locally (in the Kuroshio recirculation) and the MW remains mainly regional (concentrated in the subtropical gyre of the North Atlantic), whereas the AAIW spreads globally (well mixed throughout the entire ocean). 
PY 2017
PD JUN
SO Journal Of Physical Oceanography
SN 0022-3670
PU Amer Meteorological Soc
VL 47
IS 7
UT 000405111400004
BP 1569
EP 1586
DI 10.1175/JPO-D-16-0182.1
ID 50450
ER

EF