FN Archimer Export Format
PT J
TI Freshwater input and vertical mixing in the Canada Basin’s seasonal halocline: 1975 versus 2006-2012
BT 
AF Rosenblum, Erica
   Stroeve, Julienne
   Gille, Sarah T
   Tremblay, L Bruno
   Lique, Camille
   Fajber, Robert
   Galley, Ryan
   Barber, David
   Loureiro, Thiago
   Lukovich, Jennifer
AS 1:1,2;2:1,3,4;3:5;4:2;5:6;6:7;7:8;8:1;9:9;10:1;
FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-OH;6:;7:;8:;9:;10:;
C1 Centre for Earth Observation Science, University of Manitoba, Winnipeg, Manitoba, Canada
   Department of Atmospheric Science, McGill University, Montreal, Quebec, Canada
   Centre for Polar Observation and Modelling, University College London, Earth Sciences, London, United Kingdom
   National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
   Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, USA
   University of Brest, CNRS, IRD, Ifremer, Laboratoire d‘Oceanographie Physique et Spatiale (LOPS), IUEM, Brest, France
   Department of Physics, University of Toronto, Toronto, Ontario, Canada
   Department of Environment and Geography, University of Manitoba, Winnipeg, Manitoba, Canada
   Ryerson University, Toronto, Ontario, Canada
C2 UNIV MANITOBA, CANADA
   UNIV MCGILL, CANADA
   UNIV COLL LONDON, UK
   UNIV COLORADO BOULDER, USA
   UNIV CALIF SAN DIEGO, USA
   IFREMER, FRANCE
   UNIV TORONTO, CANADA
   UNIV MANITOBA, CANADA
   UNIV RYERSON, CANADA
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   copubli-europe
   copubli-int-hors-europe
IF 3.5
TC 2
UR https://archimer.ifremer.fr/doc/00752/86374/93816.pdf
   https://archimer.ifremer.fr/doc/00752/86374/94656.pdf
LA English
DT Article
DE ;Ocean;Arctic;Ocean dynamics;Mixed layer;Seasonal variability;Multidecadal variability
AB The seasonal halocline impacts the exchange of heat, energy, and nutrients between the surface and the deeper ocean, and it is changing in response to Arctic sea ice melt over the past several decades. Here, we assess seasonal halocline formation in 1975 and 2006-2012 by comparing daily, May to September, below-ice salinity profiles collected in the Canada Basin. We evaluate differences between the two time periods using a one-dimensional (1D) bulk model to quantify differences in freshwater input and vertical mixing. The 1D model metrics indicate that two separate factors contribute similarly to stronger stratification in 2006-2012 than in 1975: (1) larger surface freshwater input and (2) less vertical mixing of that freshwater. The first factor is mainly important in August-September, consistent with a longer melt season in recent years. The second factor is mainly important from June until mid-August, when similar levels of freshwater input in 1975 and 2006-2012 are mixed over a different depth range, resulting in different stratification. These results imply that decadal changes to ice-ocean dynamics, in addition to freshwater input, significantly contribute to the stronger seasonal stratification in 2006-2012 than in 1975. The findings highlight the need for near-surface process studies to elucidate the roles of lateral processes and ice-ocean momentum exchange on vertical mixing. 
PY 2022
PD JUN
SO Journal Of Physical Oceanography
SN 0022-3670
PU American Meteorological Society
VL 52
IS 7
UT 000830574200004
BP 1383
EP 1396
DI 10.1175/JPO-D-21-0116.1
ID 86374
ER

EF