publication . Article . 2017

Preconditioning of Antarctic maximum sea-ice extent by upper-ocean stratification on a seasonal timescale

Zhan Su;
Open Access
  • Published: 28 Jun 2017
  • Publisher: American Geophysical Union
  • Country: United States
Abstract
This study uses an observationally constrained and dynamically consistent ocean and sea ice state estimate. The author presents a remarkable agreement between the location of the edge of Antarctic maximum sea ice extent, reached in September, and the narrow transition band for the upper ocean (0–100 m depths) stratification, as early as April to June. To the south of this edge, the upper ocean has high stratification, which forbids convective fluxes to cross through; consequently, the ocean heat loss to the atmosphere is an efficient way to cool the surface ocean to the freezing point during April to September. To the north, the upper ocean has low stratificatio...
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Subjects
arXiv: Physics::Atmospheric and Oceanic PhysicsPhysics::Geophysics
free text keywords: Sea ice thickness, Geology, Ocean heat content, Oceanography, Antarctic sea ice, Thermohaline circulation, Ocean dynamics, Sea ice, geography.geographical_feature_category, geography, Ocean surface topography, Deep ocean water
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