Lower Circumpolar Deep Water Flow Through the SW Pacific Gateway for the Last 190 Ky: Evidence from Antarctic Diatoms

2013 ◽  
pp. 101-116 ◽  
Author(s):  
Catherine E. Stickley ◽  
Lionel Carter ◽  
I. Nick Mccave ◽  
Phil P.E. Weaver
Keyword(s):  
Water Flow ◽  
Deep Water ◽  
Circumpolar Deep Water ◽  
Sw Pacific ◽  
Lower Circumpolar Deep Water ◽  
Flow Through ◽  
Antarctic Diatoms

Deep flow in the Madagascar–Mascarene Basin over the last 150000 years

2005 ◽  
Vol 363 (1826) ◽  
pp. 81-99 ◽  
Author(s):  
I. N. McCave ◽  
T. Kiefer ◽  
D. J. R. Thornalley ◽  
H. Elderfield
Keyword(s):  
Southern Ocean ◽  
Water Flow ◽  
Deep Water ◽  
Last Interglacial ◽  
Circumpolar Deep Water ◽  
The North ◽  
Bottom Waters ◽  
Lower Circumpolar Deep Water ◽  
Sw Indian Ocean ◽  
Fast Flow

The SW Indian Ocean contains at least four layers of water masses with different sources: deep Antarctic (Lower Circumpolar Deep Water) flow to the north, midwater North Indian Deep Water flow to the south and Upper Circumpolar Deep Water to the north, meridional convergence of intermediate waters at 500–1500 m, and the shallow South Equatorial Current flowing west. Sedimentation rates in the area are rather low, being less than 1 cm ka −1 on Madagascar Ridge, but up to 4 cm ka −1 at Amirante Passage. Bottom flow through the Madagascar–Mascarene Basin into Amirante Passage varies slightly on glacial–interglacial time–scales, with faster flow in the warm periods of the last interglacial and minima in cold periods. Far more important are the particularly high flow rates, inferred from silt grain size, which occur at warm–to–cold transitions rather than extrema. This suggests the cause is changing density gradient driving a transiently fast flow. Corroboration is found in the glacial–interglacial range of benthic d 18 O which is ca. 2%, suggesting water close to freezing and at least 1.2 more saline and thus more dense glacial bottom waters than present. Significant density steps are inferred in isotope stage 6, the 5e–5d, and 5a–4 transitions. Oxygen isotope data suggest little change by mixing in glacial bottom water on their northward path. Benthic carbon isotope ratios at Amirante Passage differ from glacial Southern Ocean values, due possibly to absence of a local productivity effect present in the Southern Ocean.

scholarly journals Bottom water warming along the pathway of lower circumpolar deep water in the Pacific Ocean

2006 ◽  
Vol 33 (23) ◽  
Author(s):  
Takeshi Kawano ◽  
Masao Fukasawa ◽  
Shinya Kouketsu ◽  
Hiroshi Uchida ◽  
Toshimasa Doi ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Deep Water ◽  
Bottom Water ◽  
Circumpolar Deep Water ◽  
The Pacific ◽  
Lower Circumpolar Deep Water ◽  
The Pacific Ocean

On the application of hydraulic theory to the deep-water flow through the Irbe Strait

2000 ◽  
Vol 25 (3-4) ◽  
pp. 323-332 ◽  
Author(s):  
Janek Laanearu ◽  
Urmas Lips ◽  
Peter Lundberg
Keyword(s):  
Water Flow ◽  
Deep Water ◽  
Hydraulic Theory ◽  
Flow Through

On the deep-water flow through the Faroe Bank Channel

1988 ◽  
Vol 93 (C2) ◽  
pp. 1281 ◽  
Author(s):  
Karin M. Borenäs ◽  
Peter A. Lundberg
Keyword(s):  
Water Flow ◽  
Deep Water ◽  
Flow Through
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