FN Archimer Export Format
PT J
TI Genesis and Decay of Mesoscale Baroclinic Eddies in the Seasonally Ice-Covered Interior Arctic Ocean
BT 
AF Meneghello, Gianluca
   Marshall, John
   Lique, Camille
   Isachsen, Pål Erik
   Doddridge, Edward
   Campin, Jean-Michel
   Regan, Heather
   Talandier, Claude
AS 1:1;2:1;3:2;4:3,4;5:1,5;6:1;7:2;8:6;
FF 1:;2:;3:PDG-ODE-LOPS-OH;4:;5:;6:;7:PDG-ODE-LOPS-OH;8:;
C1 Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
   Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d’Océanographie Physique et Spatiale, IUEM, Brest, France
   University of Oslo, Oslo, Norway
   Norwegian Meteorological Institute, Oslo, Norway
   Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
   Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d’Océanographie Physique et Spatiale, IUEM, Brest, France
C2 MIT, USA
   IFREMER, FRANCE
   UNIV OSLO, NORWAY
   NORWEGIAN METEOROL INST MET NO, NORWAY
   UNIV TASMANIA, AUSTRALIA
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 3.806
TC 33
UR https://archimer.ifremer.fr/doc/00665/77743/79866.pdf
   https://archimer.ifremer.fr/doc/00665/77743/79913.zip
LA English
DT Article
DE ;Arctic;Baroclinic flows;Eddies;Ocean circulation;In situ oceanic observations;Quasigeostrophic models
AB Observations of ocean currents in the Arctic interior show a curious, and hitherto unexplained, vertical and temporal distribution of mesoscale activity. A marked seasonal cycle is found close to the surface: strong eddy activity during summer, observed from both satellites and moorings, is followed by very quiet winters. In contrast, subsurface eddies persist all year long within the deeper halocline and below. Informed by baroclinic instability analysis, we explore the origin and evolution of mesoscale eddies in the seasonally ice-covered interior Arctic Ocean. We find that the surface seasonal cycle is controlled by friction with sea ice, dissipating existing eddies and preventing the growth of new ones. In contrast, subsurface eddies, enabled by interior potential vorticity gradients and shielded by a strong stratification at a depth of approximately 50 m, can grow independently of the presence of sea ice. A high-resolution pan-Arctic ocean model confirms that the interior Arctic basin is baroclinically unstable all year long at depth. We address possible implications for the transport of water masses between the margins and the interior of the Arctic basin, and for climate models’ ability to capture the fundamental difference in mesoscale activity between ice-covered and ice-free regions. 
PY 2021
PD JAN
SO Journal Of Physical Oceanography
SN 0022-3670
PU American Meteorological Society
VL 51
IS 1
UT 000646374900008
BP 115
EP 129
DI 10.1175/JPO-D-20-0054.1
ID 77743
ER

EF