scholarly journals Porsild, A.E. The Vascular Plants of the Werstern Canadian Arctic Archipelago. (Canada, ministère du Nord canadien et des Ressources nationales, Musée national, Bull. no 135); Ottawa, Imprimeur de la reine, 1955. Un volume 226 pp., 22 figures, 24 planches phot., index.

1956 ◽  
Vol 1 (1) ◽  
pp. 94
Author(s):  
Benoît Robitaille
Keyword(s):  
Vascular Plants ◽  
Canadian Arctic ◽  
Canadian Arctic Archipelago

THE BOTANY OF THE NORTHWESTERN QUEEN ELIZABETH ISLANDS

1961 ◽  
Vol 39 (4) ◽  
pp. 909-942 ◽  
Author(s):  
D. B. O. Savile
Keyword(s):  
Snow Cover ◽  
Vascular Plants ◽  
Ice Sheets ◽  
Ice Sheet ◽  
Canadian Arctic ◽  
Distribution Patterns ◽  
Canadian Arctic Archipelago ◽  
Summer Climate ◽  
Parasitic Fungi ◽  
South West

Ellef Ringnes Island has a confirmed flora of 49 vascular plants and five parasitic fungi. The adjacent islands have less diversity of habitat and probably have even poorer floras. There are no endemics and the plants are extremely depauperate. The summer climate at Isachsen is colder than at any other station in the Canadian arctic. Although there are no convincing indications that Ellef Ringnes I. was overrun by a Wisconsin continental ice sheet, it cannot have escaped being snow-covered. The light cover of snow and ice on the outer islands was quickly lost in the postglacial xerothermic, which enabled plants to spread along the periphery of the archipelago. The numerous plants that occur south-west and northeast of these islands but not in them indicate that postglacial cold periods, probably accompanied by at least partial snow cover of the outermost islands, have driven out many species. Nearctic refugia are discussed and it is indicated, by analysis of distribution patterns, that no refugia occurred in the Canadian arctic archipelago. The region has been colonized from the Peary Land refuge, the Yukon–Alaska refugia, and from south of the retreating ice sheets.

Vascular plants from some localities in the western and northern parts of the Canadian Arctic Archipelago

1970 ◽  
Vol 48 (11) ◽  
pp. 1931-1938 ◽  
Author(s):  
Marian Kuc
Keyword(s):  
Vascular Plants ◽  
Canadian Arctic ◽  
River Valley ◽  
Canadian Arctic Archipelago ◽  
Good Friday ◽  
Banks Island ◽  
Axel Heiberg Island

The paper lists 123 species of vascular plants from several areas hitherto not investigated botanically: Masik River Valley, Banks Island; Eglinton Island; Fitzwilliam Owen Island; and Good Friday Bay, Axel Heiberg Island. Also, collections are listed from Meighen Island and from the vicinity of Eureka, Axel Heiberg Island, both areas where botanical work has been carried out earlier.

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.

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