scholarly journals Sediment Layers Pinpoint Periods of Climatic Change

Eos ◽  
2020 ◽  
Vol 101 ◽  
Author(s):  
Katherine Kornei
Keyword(s):  
Pacific Ocean ◽  
Climatic Change ◽  
Sediment Cores ◽  
Ice Sheet ◽  
Gulf Of Alaska ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Cordilleran Ice Sheet ◽  
Sediment Layers

Researchers studying sediment cores from the Gulf of Alaska have pinpointed when the Cordilleran Ice Sheet, now extinct, disgorged icebergs into the Pacific Ocean.

Phasing of millennial-scale climate variability in the Pacific and Atlantic Oceans

Science ◽  
2020 ◽  
Vol 370 (6517) ◽  
pp. 716-720 ◽  
Author(s):  
Maureen H. Walczak ◽  
Alan C. Mix ◽  
Ellen A. Cowan ◽  
Stewart Fallon ◽  
L. Keith Fifield ◽  
...  
Keyword(s):  
North Pacific ◽  
Ice Sheet ◽  
Gulf Of Alaska ◽  
Ocean Dynamics ◽  
Laurentide Ice Sheet ◽  
Close Coupling ◽  
Carbon 14 ◽  
The Pacific ◽  
Cordilleran Ice Sheet ◽  
Millennial Scale

New radiocarbon and sedimentological results from the Gulf of Alaska document recurrent millennial-scale episodes of reorganized Pacific Ocean ventilation synchronous with rapid Cordilleran Ice Sheet discharge, indicating close coupling of ice-ocean dynamics spanning the past 42,000 years. Ventilation of the intermediate-depth North Pacific tracks strength of the Asian monsoon, supporting a role for moisture and heat transport from low latitudes in North Pacific paleoclimate. Changes in carbon-14 age of intermediate waters are in phase with peaks in Cordilleran ice-rafted debris delivery, and both consistently precede ice discharge events from the Laurentide Ice Sheet, known as Heinrich events. This timing precludes an Atlantic trigger for Cordilleran Ice Sheet retreat and instead implicates the Pacific as an early part of a cascade of dynamic climate events with global impact.

Ice-Sheet Glaciation of the Puget Lowland, Washington, during the Vashon Stade (Late Pleistocene)

1980 ◽  
Vol 13 (3) ◽  
pp. 303-321 ◽  
Author(s):  
Robert M. Thorson
Keyword(s):  
Ice Sheet ◽  
Tectonic Deformation ◽  
Northwestern Part ◽  
Maximum Extent ◽  
Olympic Mountains ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Western Washington ◽  
Longitudinal Profiles ◽  
Cordilleran Ice Sheet

AbstractDuring the Vashon Stade of the Fraser Glaciation, about 15,000–13,000 yr B.P., a lobe of the Cordilleran Ice Sheet occupied the Puget lowland of western Washington. At its maximum extent about 14,000 yr ago, the ice sheet extended across the Puget lowland between the Cascade Range and Olympic Mountains and terminated about 80 km south of Seattle. Meltwater streams drained southwest to the Pacific Ocean and built broad outwash trains south of the ice margin. Reconstructed longitudinal profiles for the Puget lobe at its maximum extent are similar to the modern profile of Malaspina Glacier, Alaska, suggesting that the ice sheet may have been in a near-equilibrium state at the glacial maximum. Progressive northward retreat from the terminal zone was accompanied by the development of ice-marginal streams and proglacial lakes that drained southward during initial retreat, but northward during late Vashon time. Relatively rapid retreat of the Juan de Fuca lobe may have contributed to partial stagnation of the northwestern part of the Puget lobe. Final destruction of the Puget lobe occurred when the ice retreated north of Admiralty Inlet. The sea entered the Puget lowland at this time, allowing the deposition of glacial-marine sediments which now occur as high as 50 m altitude. These deposits, together with ice-marginal meltwater channels presumed to have formed above sea level during deglaciation, suggest that a significant amount of postglacial isostatic and(or) tectonic deformation has occurred in the Puget lowland since deglaciation.

scholarly journals Cordilleran ice-sheet growth fueled primary productivity in the Gulf of Alaska, northeast Pacific Ocean

Geology ◽  
2018 ◽  
Vol 46 (4) ◽  
pp. 307-310 ◽  
Author(s):  
Juliane Müller ◽  
Oscar Romero ◽  
Ellen A. Cowan ◽  
Erin L. McClymont ◽  
Matthias Forwick ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Primary Productivity ◽  
Ice Sheet ◽  
Gulf Of Alaska ◽  
Northeast Pacific ◽  
Cordilleran Ice Sheet ◽  
Northeast Pacific Ocean

Range Extension of Flag Rockfish (Sebastodes rubrivinctus) to Aleutian Islands

1969 ◽  
Vol 26 (7) ◽  
pp. 1955-1956 ◽  
Author(s):  
E. A. Best ◽  
Peter J. Eldridge
Keyword(s):  
Pacific Ocean ◽  
Gulf Of Alaska ◽  
Range Extension ◽  
Aleutian Islands ◽  
The Pacific ◽  
The Pacific Ocean

During August 1967, 12 specimens of Sebastodes rubrivinctus were collected from the Pacific Ocean off Amchitka Island, Alaska. This is a westward extension of their known range from the Gulf of Alaska.

Isolation of sulfate‐reducing bacteria from deep sediment layers of the pacific ocean

1998 ◽  
Vol 15 (2) ◽  
pp. 67-83 ◽  
Author(s):  
Stephen P. Barnes ◽  
Samuel D. Bradbrook ◽  
Barry A. Cragg ◽  
Julian R. Marchesi ◽  
Andrew J. Weightman ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Sulfate Reducing Bacteria ◽  
Deep Sediment ◽  
Sulfate Reducing ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Sediment Layers ◽  
Reducing Bacteria

Description of a new species of Trichogypsiidae (Porifera, Calcarea) and first record of the genus in the Pacific Ocean

Zootaxa ◽  
2017 ◽  
Vol 4312 (2) ◽  
pp. 394 ◽  
Author(s):  
HELMUT LEHNERT ◽  
ROBERT P. STONE
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
North Pacific Ocean ◽  
Gulf Of Alaska ◽  
First Record ◽  
The North ◽  
The Pacific ◽  
The Family ◽  
The Pacific Ocean ◽  
A New Species

A new species of Trichogypsiidae is described and compared to its congeners. Trichogypsia alaskensis n. sp. represents the fifth species of the family and with this record all three genera of the family are now represented in the North Pacific Ocean. Calcarea are rare in the Gulf of Alaska but with this new record the number of confirmed species rises from two to three. The new species has larger diactines of a broader size range and with a different pattern of spination than all congeners. 

On the Pacific Ocean regime shift

2001 ◽  
Vol 28 (19) ◽  
pp. 3721-3724
Author(s):  
Cathy Stephens
Keyword(s):  
Pacific Ocean ◽  
Regime Shift ◽  
The Pacific ◽  
The Pacific Ocean
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