An assessment of present and future climate in the Mackenzie Delta and the near-shore Beaufort Sea region of Canada

2009 ◽  
Vol 29 (12) ◽  
pp. 1780-1795 ◽  
Author(s):  
Barrie R. Bonsal ◽  
Bohdan Kochtubajda
Keyword(s):  
Beaufort Sea ◽  
Future Climate ◽  
Mackenzie Delta ◽  
Near Shore

Simultaneous Passive And Active Microwave Observations Of Near-Shore Beaufort Sea Ice

1977 ◽  
Author(s):  
W.J. Campbell ◽  
P.J. Gloersen ◽  
H.J. Zwally ◽  
R.O. Ramseier ◽  
C.J. Elachi
Keyword(s):  
Sea Ice ◽  
Beaufort Sea ◽  
Near Shore

A study of sub-seabottom permafrost in the Beaufort Sea-Mackenzie Delta by hydraulic drilling methods

10.4095/8322 ◽  
1977 ◽  
Author(s):  
H A MacAulay ◽  
A S Judge ◽  
J A Hunter ◽  
V S Allen ◽  
R M Gagne ◽  
...  
Keyword(s):  
Beaufort Sea ◽  
Mackenzie Delta

Recent mollusc distribution patterns and palaeobathymetry, southeastern Beaufort Sea

1977 ◽  
Vol 14 (9) ◽  
pp. 2013-2028 ◽  
Author(s):  
Frances J. E. Wagner
Keyword(s):  
Shallow Water ◽  
Water Depth ◽  
Distribution Patterns ◽  
Beaufort Sea ◽  
Yukon Territory ◽  
Sea Levels ◽  
Near Shore ◽  
Depth Ranges ◽  
Offshore Transport ◽  
Shallow Water Species

Molluscs were obtained from 515 of the 657 grab samples collected 1970–1972 inclusive from southeastern Beaufort Sea, from 29 of the 46 cores taken in the area, and from raised marine deposits at Kay Point and on Herschel Island, Yukon Territory. One hundred and one species have been identified. Water depth was apparently the major factor controlling species distribution. Holocene sea levels, determined by comparing core faunas with the established depth ranges for living specimens, are considered to be reasonably accurate for near-shore sites, but yield excessively shallow water depth figures for deep stations (outer shelf and slope). The anomalous results are probably related to offshore transport of shallow water species.

Impacts of riverine terrestrial organic matter on the lower trophic levels of an Arctic shelf ecosystem

2021 ◽  
Author(s):  
Michael Bedington ◽  
Ricardo Torres ◽  
Luca Polimene ◽  
Phillip Wallhead ◽  
Bennett Juhls ◽  
...  
Keyword(s):  
Organic Matter ◽  
Future Climate ◽  
Trophic Levels ◽  
The Arctic ◽  
Nutrient Concentrations ◽  
Climate Scenarios ◽  
Arctic Ecosystems ◽  
Terrestrial Organic Matter ◽  
Biogeochemical Models ◽  
Near Shore

<p>The Arctic ocean receives 11% of the entire global river discharge via several great Arctic rivers that drain vast catchments underlain with carbon-rich permafrost. Arctic marginal shelf seas are therefore heavily influenced by terrestrial dissolved organic matter (tDOM) supply, influencing coastal biogeochemical processes and food-webs, as well as physio-chemical properties (e.g. stratification or nutrient concentrations).</p><p>Whilst carbon and associated macronutrients supplied by tDOM may enhance the nutrient and carbon substrates for lower trophic levels (phytoplankton/zooplankton), promoting increased local and regional productivity, it can also have opposing effects through a series of indirect processes (e.g. increased light absorption limiting light penetration through the water column). Understanding the relative importance and timing of these processes, and how they vary spatially, is necessary to identify how land-ocean interfaces currently operate.</p><p>Future climate scenarios indicate increased quantities of riverine tDOM delivered to the near-shore, with increased freshwater runoff and greater terrestrial permafrost thaw and erosion. This is likely to be exacerbated by the disappearance of seasonal sea ice cover and increased coastal erosion rates. We can therefore expect changes in planktonic phenology and productivity, with concomitant changes in bacterial and higher trophic level success. Understanding how these factors interact and may change under future climate scenarios is therefore critical to predict the future impact on shelf sea Arctic ecosystems and the ecosystem services they provide.</p><p>In the Changing Arctic Carbon cycle in the cOastal Ocean Near-shore (CACOON) project (UK-Germany collaboration) we are using coupled hydrodynamic-biogeochemical models in the extensive shallow shelf of the Laptev sea to explore the relationship between these factors. The ecosystem model ERSEM has been adapted to explicitly include a tDOM component. This coupled model system allows us to investigate both the role of present day tDOM in an Arctic coastal ecosystem and to project the potential impacts of increased tDOM input in future.</p>

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