scholarly journals A belt of seabed erosion along the Beaufort Sea margin, offshore Northwest Territories, governed by Holocene evolution of the Beaufort Shelf-Break Jet; geological evidence, current measurements, and initial oceanographic modelling

2017 ◽  
Author(s):  
E L King ◽  
M Li ◽  
Y Wu ◽  
A Forest ◽  
S Blasco ◽  
...  
Keyword(s):  
Northwest Territories ◽  
Beaufort Sea ◽  
Shelf Break ◽  
Geological Evidence

scholarly journals Albedo of Melting Sea Ice in the Southern Beaufort Sea

1971 ◽  
Vol 10 (58) ◽  
pp. 101-104 ◽  
Author(s):  
M.P. Langleben
Keyword(s):  
Sea Ice ◽  
Northwest Territories ◽  
Beaufort Sea ◽  
Ice Cover ◽  
Short Wave ◽  
Wave Radiation ◽  
Short Wave Radiation ◽  
Melting Period ◽  
Fast Ice ◽  
Made In

AbstractTwo Kipp hemispherical radiometers mounted back to back and suspended by an 18 m cable from a helicopter flying at an altitude of about 90 m were used to make measurements of incident and reflected short-wave radiation. The helicopter was brought to a hovering position at the instant of measurement to ensure that the radiometers were in the proper attitude and a photograph of the ice cover was taken at the same time. The observations were made in 1969 during 16 flights out of Tuktoyaktuk, Northwest Territories (lat. 69° 26’N., long. 133° 02’W.) over the fast ice extending 80 km north of Tuktoyaktuk. Values of albedo of the ice cover were found to decrease during the melting period according to the equation A = 0.59 —0.32P where P is the degree of puddling of the surface.

scholarly journals Patterns of suspended particulate matter across the continental margin in the Canadian Beaufort Sea during summer

2019 ◽  
Vol 16 (7) ◽  
pp. 1583-1605 ◽  
Author(s):  
Jens K. Ehn ◽  
Rick A. Reynolds ◽  
Dariusz Stramski ◽  
David Doxaran ◽  
Bruno Lansard ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Sea Ice ◽  
Suspended Particulate Matter ◽  
Continental Margin ◽  
Suspended Particle ◽  
Particle Diameter ◽  
Beaufort Sea ◽  
Shelf Break ◽  
Return Flow ◽  
Suspended Particulate

Abstract. The particulate beam attenuation coefficient at 660 nm, cp(660), was measured in conjunction with properties of suspended particle assemblages in August 2009 within the Canadian Beaufort Sea continental margin, a region heavily influenced by freshwater and sediment discharge from the Mackenzie River, but also by sea ice melt. The mass concentration of suspended particulate matter (SPM) ranged from 0.04 to 140 g m−3, its composition varied from mineral to organic dominated, and the median particle diameter determined over the range 0.7–120 µm varied from 0.78 to 9.45 µm, with the fraction of particles <1 µm in surface waters reflecting the degree influenced by river water. Despite this range in particle characteristics, a strong relationship between SPM and cp(660) was found and used to determine SPM distributions across the shelf based on measurements of cp(660) taken during summer seasons of 2004, 2008, and 2009. SPM spatial patterns on the stratified shelf reflected the vertically sheared two-layer estuarine circulation and SPM sources (i.e., fluvial inputs, bottom resuspension, and biological productivity). Along-shelf winds generated lateral Ekman flows, isopycnal movements, and upwelling or downwelling at the shelf break. Cross-shelf transects measured during three summers illustrate how sea ice meltwater affects river plume extent, while the presence of meltwater on the shelf was associated with enhanced near-bottom SPM during return flow of upwelled Pacific-origin water. SPM decreased sharply past the shelf break with further transport of particulate matter occurring near the bottom and in interleaving nepheloid layers. These findings expand our knowledge of particle distributions in the Beaufort Sea controlled by river discharge, sea ice, and wind, each of which is sensitive to weather and climate variations.

Current surges and seabed erosion near the shelf break in the Canadian Beaufort Sea: A response to wind and ice motion stress

2016 ◽  
Vol 160 ◽  
pp. 1-16 ◽  
Author(s):  
Alexandre Forest ◽  
Philip D. Osborne ◽  
Gregory Curtiss ◽  
Malcolm G. Lowings
Keyword(s):  
Beaufort Sea ◽  
Shelf Break

scholarly journals GIS compilation of coastline variability spanning 60 years, western Beaufort Sea, Yukon and Northwest Territories

2014 ◽  
Author(s):  
S Hynes ◽  
S M Solomon ◽  
D L Forbes ◽  
D Whalen ◽  
G L Manson
Keyword(s):  
Northwest Territories ◽  
Beaufort Sea

scholarly journals Albedo of Melting Sea Ice in the Southern Beaufort Sea

1971 ◽  
Vol 10 (58) ◽  
pp. 101-104 ◽  
Author(s):  
M.P. Langleben
Keyword(s):  
Sea Ice ◽  
Northwest Territories ◽  
Beaufort Sea ◽  
Ice Cover ◽  
Short Wave ◽  
Wave Radiation ◽  
Short Wave Radiation ◽  
Melting Period ◽  
Fast Ice ◽  
Made In

Two Kipp hemispherical radiometers mounted back to back and suspended by an 18 m cable from a helicopter flying at an altitude of about 90 m were used to make measurements of incident and reflected short-wave radiation. The helicopter was brought to a hovering position at the instant of measurement to ensure that the radiometers were in the proper attitude and a photograph of the ice cover was taken at the same time. The observations were made in 1969 during 16 flights out of Tuktoyaktuk, Northwest Territories (lat. 69° 26’N., long. 133° 02’W.) over the fast ice extending 80 km north of Tuktoyaktuk. Values of albedo of the ice cover were found to decrease during the melting period according to the equationA= 0.59 —0.32PwherePis the degree of puddling of the surface.

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