scholarly journals Frontal structures associated with coastal upwelling and ice-edge subduction events in southern Beaufort Sea during the Canadian Arctic Shelf Exchange Study

2015 ◽  
Vol 120 (4) ◽  
pp. 2523-2539 ◽  
Author(s):  
Caroline Sévigny ◽  
Yves Gratton ◽  
Peter S. Galbraith
Keyword(s):  
Coastal Upwelling ◽  
Canadian Arctic ◽  
Beaufort Sea ◽  
Arctic Shelf ◽  
Exchange Study ◽  
Ice Edge

Blowing snow studies in the Canadian Arctic Shelf Exchange Study, 2003–04

2006 ◽  
Vol 20 (4) ◽  
pp. 817-827 ◽  
Author(s):  
S. A. Savelyev ◽  
M. Gordon ◽  
J. Hanesiak ◽  
T. Papakyriakou ◽  
P. A. Taylor
Keyword(s):  
Canadian Arctic ◽  
Arctic Shelf ◽  
Blowing Snow ◽  
Exchange Study

Holocene History of the Bering Sea Bowhead Whale (Balaena Mysticetus) in Its Beaufort Sea Summer Grounds off Southwestern Victoria Island, Western Canadian Arctic

2001 ◽  
Vol 55 (3) ◽  
pp. 371-379 ◽  
Author(s):  
Arthur S. Dyke ◽  
James M. Savelle
Keyword(s):  
Bering Sea ◽  
Late Holocene ◽  
Canadian Arctic ◽  
Beaufort Sea ◽  
Bowhead Whale ◽  
Bering Strait ◽  
Range Limit ◽  
Summer Range ◽  
Victoria Island ◽  
The Bering Sea

AbstractThe fossil remains of 43 bowhead whales were mapped on the raised beaches of western Wollaston Peninsula, Victoria Island, Canadian Arctic, near the historic summer range limit of the Bering Sea stock in the Beaufort Sea. The elevations and radiocarbon ages of the remains demonstrate that the bowhead ranged commonly into the region following the submergence of Bering Strait at ca. 10,000 14C yr B.P. until ca. 8500 14C yr B.P. During the same interval, bowheads ranged widely from the Beaufort Sea to Baffin Bay. Subsequently, no whales reached Wollaston Peninsula until ca. 1500 14C yr B.P. Late Holocene populations evidently were small, or occupations were brief, in comparison to those of the early Holocene. Although the late Holocene recurrence may relate to the expansion of pioneering Thule whalers eastward from Alaska, there are few Thule sites and limited evidence of Thule whaling in the area surveyed to support this suggestion.

scholarly journals Gas Hydrate Formation and Dissipation Histories in the Northern Margin of Canada: Beaufort-Mackenzie and the Sverdrup Basins

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Jacek Majorowicz ◽  
Kirk Osadetz ◽  
Jan Safanda
Keyword(s):  
Sea Level ◽  
Canadian Arctic ◽  
Beaufort Sea ◽  
Ice Cover ◽  
Pressure Effects ◽  
Ice Age ◽  
Glacial Ice ◽  
The Holocene ◽  
Surface Temperatures ◽  
Gas Hydrate Formation

Gas hydrates (GHs) are a prominent subsurface feature on the Canadian Arctic continental margin. They occur both onshore and offshore, although they formed generally terrestrially, during the last glacial sea level low-stand, both in a region that was persistently glaciated (Queen Elizabeth Islands Group, Canadian Arctic Archipelago (QEIG)), and in a region that was not persistently glaciated (Mackenzie Delta-Beaufort Sea (MD-BS)). Parts of both regions were transgressed in the Holocene. We study the dynamic permafrost and GH history in both regions using a numerical model to illustrate how changes in setting and environment, especially periodic glacial ice cover, affected GH stability. MD-BS models represent the Mallik wellsite and these models successfully match current permafrost and GH bases observed in the well-studied Mallik wells. The MD-BS models show clearly that GHs have persisted through interglacial episodes. Lower surface temperatures in the more northerly QEIG result in an earlier appearance of GH stability that persists through glacial-interglacial intervals, although the base of GH base stability varies up to 0.2 km during the 100 ka cycles. Because of the persistent glacial ice cover QEIG models illustrate pressure effects attributed to regional ice sheet loading on the bases of both permafrost and GHs since 0.9 MYBP. QEIG model permafrost and GH depths are 572 m and 1072 m, respectively, which is like that observed commonly on well logs in the QEIG. In order to match the observed GH bases in the QEIG it is necessary to introduce ice buildup and thaw gradually during the glacials and interglacials. QEIG sea level rose 100–120 m about 10 ka ago following the most recent glaciation. Shorelines have risen subsequently due to isostatic glacial unloading. Detailed recent history modeling in QEIG coastal regions, where surface temperatures have changed from near zero in the offshore to −20°C in the onshore setting results in a model GH stability base, that is, <0.5 km. These coastal model results are significantly shallower than the inferred average GH base about 1 km in wells, Smith and Judge (1993). QEIG interisland channels are generally shallow and much of the previous shoreline inundated by the Holocene transgression was above the glacial sea level low-stand during the last ice age, resulting in a QEIG setting somewhat analogous to the relict terrestrial GH now transgressed by the shallow Beaufort Sea. It is also possible that the marine conditions were present at emergent shorelines for a shorter time or that the pretransgression subsurface temperatures persisted or were influenced by coastal settings, especially where lateral effects may not be well represented by 1D models.

Seasonal variation in benthic community oxygen demand: A response to an ice algal bloom in the Beaufort Sea, Canadian Arctic?

2007 ◽  
Vol 67 (1-2) ◽  
pp. 1-12 ◽  
Author(s):  
Paul E. Renaud ◽  
Andrea Riedel ◽  
Christine Michel ◽  
Nathalie Morata ◽  
Michel Gosselin ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Benthic Community ◽  
Algal Bloom ◽  
Canadian Arctic ◽  
Oxygen Demand ◽  
Beaufort Sea

Regional and seasonal variability of zooplankton collected using sediment traps in the southeastern Beaufort Sea, Canadian Arctic

Polar Biology ◽  
2009 ◽  
Vol 33 (2) ◽  
pp. 257-270 ◽  
Author(s):  
Ryosuke Makabe ◽  
Hiroshi Hattori ◽  
Makoto Sampei ◽  
Yuya Ota ◽  
Mitsuo Fukuchi ◽  
...  
Keyword(s):  
Seasonal Variability ◽  
Canadian Arctic ◽  
Beaufort Sea ◽  
Sediment Traps

Phytoplankton community adaptation to changing light levels in the southern Beaufort Sea, Canadian Arctic

2009 ◽  
Vol 82 (3) ◽  
pp. 537-546 ◽  
Author(s):  
Atsushi Matsuoka ◽  
Pierre Larouche ◽  
Michel Poulin ◽  
Warwick Vincent ◽  
Hiroshi Hattori
Keyword(s):  
Phytoplankton Community ◽  
Canadian Arctic ◽  
Beaufort Sea ◽  
Community Adaptation ◽  
Light Levels ◽  
Changing Light
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