FN Archimer Export Format
PT J
TI Observed mean and mesoscale upper ocean circulation in the midlatitude northeast Atlantic
BT 
AF LE CANN, Bernard
   ASSENBAUM, Michel
   GASCARD, Jean-Claude
   REVERDIN, Gilles
AS 1:1,4;2:2;3:3;4:3;
FF 1:;2:PDG-DRO-UMLPO;3:;4:;
C1 Univ Bretagne Occidentale, UFR Sci, Inst Francais Rech Exploitat Mer, CNRS,Lab Phys Oceans, F-29238 Brest, France.
   Bur Rech & Etud SHOM Meteo, Lab Etud Geophys & Oceanog Spatiales, F-31400 Toulouse, France.
   Univ Paris 06, Lab Oceanog Dynam & Climatol, F-75252 Paris, France.
C2 UBO, FRANCE
   LEGOS, FRANCE
   UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DRO-UMLPO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.784
TC 27
UR https://archimer.ifremer.fr/doc/2005/publication-745.pdf
LA English
DT Article
CR POMME - T0
   POMME 1 LEG1
   POMME 1 LEG2
   POMME 2 LEG1
   POMME 2 LEG2
   POMME 3 - LEG 1
   POMME 3 - LEG 2
BO Thalassa
   L'Atalante
DE ;Altimetry;Drifting buoys;Acoustic floats;Lagrangian circulation;Mesoscale eddies;Northeastern Atlantic
AB Lagrangian instruments and altimetry data are used to investigate the upper ( 0 to similar to 500 m) mean and mesoscale circulations in a region of the midlatitude northeast Atlantic (36 degrees - 47 degrees N, 13 degrees - 23 degrees W), a formation and subduction area of Subpolar Mode Water. Lagrangian data were collected between September 2000 and September 2001 with isobaric subsurface floats, totaling 34.0 float years, and surface drifting buoys, totaling 27.9 buoy years. The near-surface ( 0 - 100 m) mean circulation is dominated by two weak ( similar to 5 cm/s) eastward currents which veer southward in the domain. In the 100- to 500-m-deep layer, these eastward mean currents retroflect westward and form two anticyclonic circulation cells, opened to the west and separated by a cyclonic cell. Eddy kinetic energy is decreasing from the northwest to the southeast of the area, from similar to 100-200 (cm/s)(2) to similar to 20 - 30 (cm/s)(2). Long-lived anticyclones and cyclones display mean coherent displacements, both to the southwest. Westward eddy propagation speeds, close to that of long Rossby waves, increase southward and are consistent with a superposition of beta effect and advection by mean currents. Southward eddy displacements are coherent with the observed mean currents. In the north, anticyclones are seen to consist of Central and Subpolar Mode Water eddies, most of them likely originating from the eastern boundary, whereas in the south, most anticyclonic features result from the influence of "Mediterranean Water Eddies'' (meddies) on the upper layers. Cyclonic activity is concentrated in "cyclonic zones,'' which are seen to exchange floats and water properties.
PY 2005
PD JUN
SO Journal of Geophysical Union - Research C - Oceans
SN 0148-0227
PU American Geophysical Union
VL 110
IS C7
UT 000230641100003
DI 10.1029/2004JC002768
ID 745
ER

EF