scholarly journals Thermal isolation of Campbell Plateau, New Zealand, by the Antarctic Circumpolar Current over the past 130 kyr

2004 ◽  
Vol 19 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Helen L. Neil ◽  
Lionel Carter ◽  
Michele Y. Morris
Keyword(s):  
New Zealand ◽  
Antarctic Circumpolar Current ◽  
Thermal Isolation ◽  
The Past ◽  
Circumpolar Current ◽  
The Antarctic

Atmospheric CO2 concentrations and δ13C values across the Antarctic Circumpolar Current between New Zealand and Antarctica

Tellus B ◽  
2007 ◽  
Vol 59 (1) ◽  
pp. 130-137 ◽  
Author(s):  
Antonio Longinelli ◽  
Federico Giglio ◽  
Leonardo Langone ◽  
Renzo Lenaz ◽  
Carlo Ori ◽  
...  
Keyword(s):  
New Zealand ◽  
Antarctic Circumpolar Current ◽  
Atmospheric Co2 ◽  
Δ13c Values ◽  
Co2 Concentrations ◽  
Circumpolar Current ◽  
Atmospheric Co2 Concentrations ◽  
The Antarctic

Atmospheric CO2concentrations andδ13C values across the Antarctic Circumpolar Current between New Zealand and Antarctica

Tellus B ◽  
2007 ◽  
Vol 59 (1) ◽  
Author(s):  
Antonio Longinelli ◽  
Federico Giglio ◽  
Leonardo Langone ◽  
Renzo Lenaz ◽  
Carlo Ori ◽  
...  
Keyword(s):  
New Zealand ◽  
Antarctic Circumpolar Current ◽  
Circumpolar Current ◽  
The Antarctic

scholarly journals Variations of the Antarctic Circumpolar Current intensity during the past 500 ka

2010 ◽  
Vol 11 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. Mazaud ◽  
E. Michel ◽  
F. Dewilde ◽  
J. L. Turon
Keyword(s):  
Antarctic Circumpolar Current ◽  
Current Intensity ◽  
The Past ◽  
Circumpolar Current ◽  
The Antarctic

scholarly journals Orbital- and millennial-scale variability of the Antarctic Circumpolar Current over the past 140,000 years

2020 ◽  
Author(s):  
Shuzhuang Wu ◽  
Lester Lembke-Jene ◽  
Frank Lamy ◽  
Helge Arz ◽  
Norbert Nowaczyk ◽  
...  
Keyword(s):  
Sea Ice ◽  
Ocean Circulation ◽  
Antarctic Circumpolar Current ◽  
Cold Water ◽  
Meridional Overturning Circulation ◽  
Global Ocean ◽  
The Past ◽  
Circumpolar Current ◽  
The Antarctic ◽  
Millennial Scale

Abstract The Antarctic Circumpolar Current (ACC) plays a crucial role in global ocean circulation by fostering deep-water upwelling and formation of new water masses. On geological time-scales, ACC variations are poorly constrained beyond the last glacial. Here, we reconstruct changes in ACC strength in the central Drake Passage over the past 140,000 years, based on grain-size and geochemical characteristics. We found significant glacial-interglacial changes of ACC flow speed, with reduced ACC intensity during glacials and a more vigorous circulation in interglacials. Superimposed on these orbital-scale changes are high-amplitude millennial-scale fluctuations, with ACC strength maxima correlating with diatom-based Antarctic winter sea-ice minima, particularly during full glacial conditions. We hypothesize that the ACC is closely linked to Southern Hemisphere millennial-scale climate oscillations, amplified through Antarctic sea ice extent changes. These strong ACC variations regulated Pacific-Atlantic water exchange via the “cold water route” and affected the Atlantic Meridional Overturning Circulation and marine carbon storage.

scholarly journals Nonlinear Differential Equations Modeling the Antarctic Circumpolar Current

2021 ◽  
Vol 23 (4) ◽  
Author(s):  
Jifeng Chu ◽  
Kateryna Marynets
Keyword(s):  
Fixed Point ◽  
Differential Equations ◽  
Boundary Conditions ◽  
Topological Degree ◽  
Antarctic Circumpolar Current ◽  
Fixed Point Theorems ◽  
Nonlinear Differential Equations ◽  
Existence Results ◽  
Circumpolar Current ◽  
The Antarctic

AbstractThe aim of this paper is to study one class of nonlinear differential equations, which model the Antarctic circumpolar current. We prove the existence results for such equations related to the geophysical relevant boundary conditions. First, based on the weighted eigenvalues and the theory of topological degree, we study the semilinear case. Secondly, the existence results for the sublinear and superlinear cases are proved by fixed point theorems.

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