Sensitivity of Labrador Sea Water Formation to Changes in Model Resolution, Atmospheric Forcing, and Freshwater Input

2019 ◽  
Vol 124 (3) ◽  
pp. 2126-2152 ◽  
Author(s):  
Yarisbel Garcia‐Quintana ◽  
Peggy Courtois ◽  
Xianmin Hu ◽  
Clark Pennelly ◽  
Dagmar Kieke ◽  
...  
Keyword(s):  
Sea Water ◽  
Labrador Sea ◽  
Model Resolution ◽  
Atmospheric Forcing ◽  
Freshwater Input ◽  
Water Formation ◽  
Labrador Sea Water

scholarly journals Breaking the Linkage Between Labrador Sea Water Production and Its Advective Export to the Subtropical Gyre

2016 ◽  
Vol 46 (7) ◽  
pp. 2169-2182 ◽  
Author(s):  
Sijia Zou ◽  
M. Susan Lozier
Keyword(s):  
Deep Water ◽  
Sea Water ◽  
Water Masses ◽  
Meridional Overturning Circulation ◽  
Subtropical Gyre ◽  
Global Ocean ◽  
Labrador Sea ◽  
Deep Water Formation ◽  
Water Formation ◽  
Labrador Sea Water

AbstractDeep water formation in the northern North Atlantic has been of long-standing interest because the resultant water masses, along with those that flow over the Greenland–Scotland Ridge, constitute the lower limb of the Atlantic meridional overturning circulation (AMOC), which carries these cold, deep waters southward to the subtropical region and beyond. It has long been assumed that an increase in deep water formation would result in a larger southward export of newly formed deep water masses. However, recent observations of Lagrangian floats have raised questions about this linkage. Motivated by these observations, the relationship between convective activity in the Labrador Sea and the export of newly formed Labrador Sea Water (LSW), the shallowest component of the deep AMOC, to the subtropics is explored. This study uses simulated Lagrangian pathways of synthetic floats produced with output from a global ocean–sea ice model. It is shown that substantial recirculation of newly formed LSW in the subpolar gyre leads to a relatively small fraction of this water exported to the subtropical gyre: 40 years after release, only 46% of the floats are able to reach the subtropics. Furthermore, waters produced from any one particular convection event are not collectively and contemporaneously exported to the subtropical gyre, such that the waters that are exported to the subtropical gyre have a wide distribution in age.

Labrador Sea Water Formation Rate and Its Impact on the Local Meridional Overturning Circulation

2019 ◽  
Vol 124 (8) ◽  
pp. 5654-5670 ◽  
Author(s):  
Charlène Feucher ◽  
Yarisbel Garcia‐Quintana ◽  
Igor Yashayaev ◽  
Xianmin Hu ◽  
Paul G. Myers
Keyword(s):  
Sea Water ◽  
Formation Rate ◽  
Meridional Overturning Circulation ◽  
Labrador Sea ◽  
Overturning Circulation ◽  
Water Formation ◽  
Meridional Overturning ◽  
Labrador Sea Water

scholarly journals Detecting Labrador Sea Water formation from space

2013 ◽  
Vol 118 (4) ◽  
pp. 2074-2086 ◽  
Author(s):  
R. Gelderloos ◽  
C. A. Katsman ◽  
K. Våge
Keyword(s):  
Sea Water ◽  
Labrador Sea ◽  
Water Formation ◽  
Labrador Sea Water

Variation of Labrador Sea Water formation over the Last Glacial cycle in a climate model of intermediate complexity

2004 ◽  
Vol 23 (3-4) ◽  
pp. 449-465 ◽  
Author(s):  
Melanie Cottet-Puinel ◽  
Andrew J. Weaver ◽  
Claude Hillaire-Marcel ◽  
Anne de Vernal ◽  
Peter U. Clark ◽  
...  
Keyword(s):  
Climate Model ◽  
Sea Water ◽  
Labrador Sea ◽  
Glacial Cycle ◽  
Last Glacial ◽  
Intermediate Complexity ◽  
Water Formation ◽  
Labrador Sea Water ◽  
The Last Glacial

The History of the Labrador Sea Water: Production, Spreading, Transformation and Loss

2008 ◽  
pp. 569-612 ◽  
Author(s):  
Igor Yashayaev ◽  
N. Penny Holliday ◽  
Manfred Bersch ◽  
Hendrik M. van Aken
Keyword(s):  
Sea Water ◽  
Labrador Sea ◽  
Water Production ◽  
History Of ◽  
Labrador Sea Water

scholarly journals Detecting changes in Labrador Sea Water through a water mass analysis of BATS data

2005 ◽  
Vol 2 (4) ◽  
pp. 417-435 ◽  
Author(s):  
A. Henry-Edwards ◽  
M. Tomczak
Keyword(s):  
Water Mass ◽  
Sea Water ◽  
Source Region ◽  
Labrador Sea ◽  
Sargasso Sea ◽  
Mass Analysis ◽  
Data Set ◽  
Water Mass Analysis ◽  
Quadratic Programming Method ◽  
Labrador Sea Water

Abstract. A new water mass analysis technique is used to analyse the BATS oceanographic data set in the Sargasso Sea of 1988-1998 for changes in Labrador Sea Water (LSW) properties. The technique is based on a sequential quadratic programming method and requires careful definition of constraints to produce reliable results. Variations in LSW temperature and salinity observed in the Labrador Sea are used to define the constraints. It is shown that to minimize the residuals while matching the observed temperature and salinity changes in the source region the nitrate concentration in the Labrador Sea has to be allowed to vary as well. It is concluded that during the period of investigation nitrate underwent significant variations in the Labrador Sea.

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