scholarly journals Assessing oxygen depletion in the Northeastern Pacific Ocean during the last deglaciation using I/Ca ratios from multiple benthic foraminiferal species

2017 ◽  
Vol 32 (8) ◽  
pp. 746-762 ◽  
Author(s):  
M. A. Taylor ◽  
I. L. Hendy ◽  
A. Chappaz
Keyword(s):  
Pacific Ocean ◽  
Oxygen Depletion ◽  
Last Deglaciation ◽  
Foraminiferal Species ◽  
Northeastern Pacific ◽  
The Last Deglaciation

Changes in the rate of ventilation of intermediate and deep water masses in the pacific ocean during the last deglaciation

1988 ◽  
Vol 70 (1-2) ◽  
pp. 108 ◽  
Author(s):  
J.C. Duplessy ◽  
M. Arnold ◽  
N.J. Shackleton ◽  
N. Kallel ◽  
L. Labeyrie ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Deep Water ◽  
Water Masses ◽  
Last Deglaciation ◽  
The Pacific ◽  
The Pacific Ocean ◽  
The Last Deglaciation

scholarly journals Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation

2013 ◽  
Vol 9 (6) ◽  
pp. 6221-6253 ◽  
Author(s):  
L. Max ◽  
L. Lembke-Jene ◽  
J.-R. Riethdorf ◽  
R. Tiedemann ◽  
D. Nürnberg ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Deep Water ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Northwest Pacific ◽  
Intermediate Water ◽  
Okhotsk Sea ◽  
Last Deglaciation ◽  
North Pacific Intermediate Water ◽  
The Last Deglaciation

Abstract. Under modern conditions only North Pacific Intermediate Water is formed in the Northwest Pacific Ocean. This situation might have changed in the past. Recent studies with General Circulation Models indicate a switch to deep-water formation in the Northwest Pacific during Heinrich Stadial 1 (17.5–15.0 kyr) of the last glacial termination. Reconstructions of past ventilation changes based on paleoceanographic proxy records are still insufficient to test whether a deglacial mode of deep-water formation in the North Pacific Ocean existed. Here we present deglacial ventilation records based on radiocarbon-derived ventilation ages in combination with epibenthic stable carbon isotopes from the Northwest Pacific including the Okhotsk Sea and Bering Sea, the two potential source regions for past North Pacific ventilation changes. Evidence for most rigorous ventilation of the mid-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic Meridional Overturning Circulation. Concurrent changes in δ13C and ventilation ages point to the Okhotsk Sea as driver of millennial-scale changes in North Pacific Intermediate Water ventilation during the last deglaciation. Our records additionally indicate that changes in the δ13C intermediate water (700–1750 m water depth) signature and radiocarbon-derived ventilation ages are in antiphase to those of the deep North Pacific Ocean (>2100 m water depth) during the last glacial termination. Thus, intermediate and deep-water masses of the Northwest Pacific have a differing ventilation history during the last deglaciation.

scholarly journals Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation

2014 ◽  
Vol 10 (2) ◽  
pp. 591-605 ◽  
Author(s):  
L. Max ◽  
L. Lembke-Jene ◽  
J.-R. Riethdorf ◽  
R. Tiedemann ◽  
D. Nürnberg ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Deep Water ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Northwest Pacific ◽  
Intermediate Water ◽  
Okhotsk Sea ◽  
Last Deglaciation ◽  
North Pacific Intermediate Water ◽  
The Last Deglaciation

Abstract. Under modern conditions only North Pacific Intermediate Water is formed in the northwest Pacific Ocean. This situation might have changed in the past. Recent studies with general circulation models indicate a switch to deep-water formation in the northwest Pacific during Heinrich Stadial 1 (17.5–15.0 ka) of the last glacial termination. Reconstructions of past ventilation changes based on paleoceanographic proxy records are still insufficient to test whether a deglacial mode of deep-water formation in the North Pacific Ocean existed. Here we present deglacial ventilation records based on radiocarbon-derived ventilation ages in combination with epibenthic stable carbon isotopes from the northwest Pacific including the Okhotsk Sea and Bering Sea, the two potential source regions for past North Pacific ventilation changes. Evidence for most rigorous ventilation of the intermediate-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic Meridional Overturning Circulation. Concurrent changes in δ13C and ventilation ages point to the Okhotsk Sea as driver of millennial-scale changes in North Pacific Intermediate Water ventilation during the last deglaciation. Our records additionally indicate that changes in the δ13C intermediate-water (700–1750 m water depth) signature and radiocarbon-derived ventilation ages are in antiphase to those of the deep North Pacific Ocean (>2100 m water depth) during the last glacial termination. Thus, intermediate- and deep-water masses of the northwest Pacific have a differing ventilation history during the last deglaciation.

Radiocarbon age anomaly at intermediate water depth in the Pacific Ocean during the last deglaciation

2009 ◽  
Vol 24 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Lowell Stott ◽  
John Southon ◽  
Axel Timmermann ◽  
Athanasios Koutavas
Keyword(s):  
Pacific Ocean ◽  
Water Depth ◽  
Intermediate Water ◽  
Last Deglaciation ◽  
Radiocarbon Age ◽  
The Pacific ◽  
The Pacific Ocean ◽  
The Last Deglaciation
Sign in / Sign up

Export Citation Format

Share Document