Geology of the Polaris Zn-Pb Deposit and Surrounding Area, Canadian Arctic Archipelago

1996 ◽  
pp. 307-319 ◽  
Keyword(s):  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Surrounding Area

A regional approach to plant DNA barcoding provides high species resolution of sedges ( Carex and Kobresia , Cyperaceae) in the Canadian Arctic Archipelago

2009 ◽  
Vol 10 (1) ◽  
pp. 69-91 ◽  
Author(s):  
JESSICA LE CLERC‐BLAIN ◽  
JULIAN R. STARR ◽  
ROGER D. BULL ◽  
JEFFERY M. SAARELA
Keyword(s):  
Dna Barcoding ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Regional Approach ◽  
Plant Dna

Subglacial bedform evidence for a major palaeo-ice stream and its retreat phases in Amundsen Gulf, Canadian Arctic Archipelago

2006 ◽  
Vol 21 (4) ◽  
pp. 399-412 ◽  
Author(s):  
C. R. Stokes ◽  
C. D. Clark ◽  
M. C. M. Winsborrow
Keyword(s):  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Ice Stream ◽  
Amundsen Gulf

scholarly journals Regional variability of acidification in the Arctic: a sea of contrasts

2014 ◽  
Vol 11 (2) ◽  
pp. 293-308 ◽  
Author(s):  
E. E. Popova ◽  
A. Yool ◽  
Y. Aksenov ◽  
A. C. Coward ◽  
T. R. Anderson
Keyword(s):  
Climate Change ◽  
Primary Production ◽  
Arctic Ocean ◽  
Canadian Arctic ◽  
Atmospheric Co2 ◽  
The Arctic ◽  
Canadian Arctic Archipelago ◽  
Regional Variability ◽  
The Arctic Ocean ◽  
The Impact

Abstract. The Arctic Ocean is a region that is particularly vulnerable to the impact of ocean acidification driven by rising atmospheric CO2, with potentially negative consequences for calcifying organisms such as coccolithophorids and foraminiferans. In this study, we use an ocean-only general circulation model, with embedded biogeochemistry and a comprehensive description of the ocean carbon cycle, to study the response of pH and saturation states of calcite and aragonite to rising atmospheric pCO2 and changing climate in the Arctic Ocean. Particular attention is paid to the strong regional variability within the Arctic, and, for comparison, simulation results are contrasted with those for the global ocean. Simulations were run to year 2099 using the RCP8.5 (an Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) scenario with the highest concentrations of atmospheric CO2). The separate impacts of the direct increase in atmospheric CO2 and indirect effects via impact of climate change (changing temperature, stratification, primary production and freshwater fluxes) were examined by undertaking two simulations, one with the full system and the other in which atmospheric CO2 was prevented from increasing beyond its preindustrial level (year 1860). Results indicate that the impact of climate change, and spatial heterogeneity thereof, plays a strong role in the declines in pH and carbonate saturation (Ω) seen in the Arctic. The central Arctic, Canadian Arctic Archipelago and Baffin Bay show greatest rates of acidification and Ω decline as a result of melting sea ice. In contrast, areas affected by Atlantic inflow including the Greenland Sea and outer shelves of the Barents, Kara and Laptev seas, had minimal decreases in pH and Ω because diminishing ice cover led to greater vertical mixing and primary production. As a consequence, the projected onset of undersaturation in respect to aragonite is highly variable regionally within the Arctic, occurring during the decade of 2000–2010 in the Siberian shelves and Canadian Arctic Archipelago, but as late as the 2080s in the Barents and Norwegian seas. We conclude that, for future projections of acidification and carbonate saturation state in the Arctic, regional variability is significant and needs to be adequately resolved, with particular emphasis on reliable projections of the rates of retreat of the sea ice, which are a major source of uncertainty.

scholarly journals On the Thermal Regime of a High-Arctic Valley Glacier

1976 ◽  
Vol 16 (74) ◽  
pp. 119-133 ◽  
Author(s):  
Fritz Müller
Keyword(s):  
Thermal Regime ◽  
Energy Input ◽  
Canadian Arctic ◽  
High Arctic ◽  
Canadian Arctic Archipelago ◽  
Valley Glacier ◽  
Drilling Technique ◽  
Percolation Zone ◽  
Mean Annual Air Temperature ◽  
Upper Boundary

AbstractThe 10 m temperatures were measured over several years at 16 sites on the White Glacier (lat. 80° N.), Axel Heiberg Island, Canadian Arctic Archipelago. At three sites deep profiles were made using a new drilling technique, reaching a maximum depth of 280 m. Large differences in the 10 m temperatures between locations and from year to year were observed. The deviations of these temperatures from the almost isothermal mean annual air temperature over the glacier are discussed. The heating effect of the melt water in the lower percolation zone was found to be very important. A conceptual model is developed to assess the influence of these irregularities in the energy input at the upper boundary on the thermal regime of the entire glacier. So far a quantitative analysis has been made only for the relatively simple 30 m temperature profile measured on the tongue of the glacier.

Ice Masses of the Eastern Canadian Arctic Archipelago

2020 ◽  
pp. 297-314
Author(s):  
Wesley Van Wychen ◽  
Luke Copland ◽  
David Burgess
Keyword(s):  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Eastern Canadian Arctic

scholarly journals Late-Holocene Mass Movements in High Arctic East Lake, Melville Island (Western Canadian Arctic Archipelago)

2016 ◽  
pp. 311-320 ◽  
Author(s):  
Alexandre Normandeau ◽  
Gabriel Joyal ◽  
Patrick Lajeunesse ◽  
Pierre Francus ◽  
Scott Lamoureux ◽  
...  
Keyword(s):  
Late Holocene ◽  
Canadian Arctic ◽  
High Arctic ◽  
Mass Movements ◽  
Canadian Arctic Archipelago ◽  
East Lake

scholarly journals Silurian ostracoderms from Washington Land (North Greenland), with comments on cyathaspid structure, systematics and phyletic position

1986 ◽  
Vol 132 ◽  
pp. 89-123
Author(s):  
S.E Bendix-Almgreen
Keyword(s):  
Canadian Arctic ◽  
Stability Control ◽  
Canadian Arctic Archipelago ◽  
Marine Deposits ◽  
Type Section ◽  
Cape Phillips Formation ◽  
North Greenland

The few detached dermal elements recorded here document a new ostracoderm fauna comprising undeterminable species of one anaspid, two cyathaspids and a heterostracan which might have its closest relatives among the pteraspids. This fauna is derived from marine deposits of ultimate Wenlock or possibly Early Ludlow age at the top of the Lafayette Bugt Formation in its type section, in Washington Land, western North Greenland. It is probably equivalent to one of the undescribed faunas known from the Monograptus testis - M. nilssoni sequence of the Cape Phillips Formation in the Canadian Arctic Archipelago. Comparative material from Norway and Spitsbergen is considered in this study which prompted general comments on cyathaspid squamation, vestigial fin structure, cyathaspid systematics, their phyletic position relative to the pteraspids, system of stability control in swimming, their habitats and diets.

scholarly journals Raised Gravel Beaches as Proxy Indicators of Past Sea-Ice and Wave Conditions, Lowther Island, Canadian Arctic Archipelago

ARCTIC ◽  
2010 ◽  
Vol 63 (2) ◽  
Author(s):  
Dominique St-Hilaire-Gravel ◽  
Trevor J. Bell ◽  
Donald L. Forbes
Keyword(s):  
Sea Ice ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago ◽  
Proxy Indicators ◽  
Wave Conditions ◽  
Gravel Beaches
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