The Devon Island Expedition

Apollonio, Spencer; Cowie, J. W.; Voegtli, K.; Koerner, R. M.; Cress, Phaedra E; Wyness, R.; Greenhouse, John P.

doi:10.14430/arctic3683

Cited by 10 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sverdrup Glacier's north-south oriented valley is bordered by steep walls with an average height of 300 m above the glacier surface (Vögtli, 1967). Surface mass balance and ice velocity measurements were first made on Sverdrup Glacier in the 1960s (Koerner, 1970;Koerner et al, 1961;World Glacier Monitoring Service, 2008), and six automatic weather stations (AWSs) have been measuring air temperature and changes in height of the ice/snow surface within the Sverdrup glacier basin since 1999. The in situ measurements of ice velocity have shown that glacier flow rates typically increase early in the melt season, an event first measured in 1961 .…”

Section: Sverdrup Glaciermentioning

confidence: 99%

“…Hydrologically, much of the surface meltwater runoff from Sverdrup Glacier is routed ice-marginally (Boon et al, 2010). Historical field observations, as well as those made in 2019, reveal that the bulk of marginal meltwater enters the subglacial environment within 4 km of the glacier terminus (Keeler, 1964;Koerner et al, 1961). Apart from the region within 4 km of the terminus, the low ice velocities and marginal routing suggest that there is a proportionately small amount of meltwater draining along the bed compared to marginal melt, and thus, Sverdrup Glacier likely lacks an extensive subglacial drainage system.…”

Section: Sverdrup Glaciermentioning

confidence: 99%

See 1 more Smart Citation

Nutrient and Carbon Export From a Tidewater Glacier to the Coastal Ocean in the Canadian Arctic Archipelago

et al. 2021

View full text Add to dashboard Cite

As a result of climate change, polar ice caps and glaciers in the Canadian Arctic Archipelago (CAA), Greenland and Antarctica are melting faster than they were 30 years ago (Box et al., 2018;Shepherd et al., 2020). Compared to the polar ice sheets, the CAA is populated by smaller ice caps, icefields, and glaciers, and in the future, these ice masses may be particularly susceptible to warming air temperatures (Cook et al., 2019). Similar to Greenland and Antarctica, many ice caps and icefields in the CAA are drained by glaciers that terminate in the ocean (Cook et al., 2019). Recent studies show that glacial runoff into the coastal ocean can affect marine nutrient and carbon supply (

show abstract

Section: Sverdrup Glaciermentioning

confidence: 99%

Section: Sverdrup Glaciermentioning

confidence: 99%

Nutrient and Carbon Export From a Tidewater Glacier to the Coastal Ocean in the Canadian Arctic Archipelago

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Northern terrain science is built on a strong tradition of field-based research, where presence in the field is central to the formulation of research questions and the testing of hypotheses (e.g., Apollonio et al, 1961;Mackay, 1963;Mackay and Burn, 2002;Boon et al, 2010;Clarke, 2014). However, northern locations are difficult and costly to access, and the option of spending an extended period in the field is not always available.…”

Section: Field-based Researchmentioning

confidence: 99%

Permafrost and Thermokarst Lake Dynamics in the Old Crow Flats, Northern Yukon, Canada

Roy-Léveillée¹

View full text Add to dashboard Cite

Aspects of the thaw lake cycle were investigated in Old Crow Flats (OCF). OCF is a 5600 km 2 peatland with thousands of thermokarst lakes in the continuous permafrost of northern Yukon. It is located in the traditional territory of the Vuntut Gwich'in, who expressed concern that climatic change may be affecting the permafrost and lakes of OCF.Field data collected in 2008-2011 provided the first assessment of spatial variability in permafrost temperatures across the treeline ecotone in OCF.Lake-bottom temperatures were recorded near the shores of four thermokarst lakes and talik configuration was defined beneath the lakes by jet-drilling to determine conditions controlling permafrost degradation in the area. Analytical and thermal models were used to relate field observations to current theory. Surface and subsurface conditions were examined in three drained lake basins and four expanding lakes to investigate how shore recession, talik development, and sediment deposition during lake expansion control the topography in lake basins after drainage.Permafrost temperature at the depth of zero annual amplitude varied between -5.1°C and -2.6°C on the Flats. Within the forest-tundra transition, spatial variability in permafrost temperatures appeared to be controlled by the snow-holding capacity of vegetation and the configuration of land covers in the surrounding landscape, which controlled snow supply. Annual mean lake-bottom temperatures close to shorelines were unaffected by spatial variations in on-ice snow depth, but accumulation of freezing degree-days at the lake bottom varied sufficiently to affect rates of permafrost degradation beneath the lake. Where ice reached the lake bottom, talik development rates were controlled by the ratio of freezing degree days to thawing degree days and the thermal offset in the lake iii sediment. After lake drainage and permafrost aggradation, thermokarst lake basins in OCF commonly develop depressed margins and raised centres. An elevation difference of up to 2 m was recorded between the margins and centres of drained basins, but this elevation difference was not associated with increased ice-wedge density or increased segregated ice content. A conceptual model based on sediment deposition patterns during lake expansion was proposed to explain the topography of drained lake basins in OCF.iv Preface

show abstract

“…During the reconnaissance year (1959) of the McGill expeditions to Axel Heiberg, AINA was preparing its own Devon Island Expedition (Apollonio, 1962). This expedition, like its McGill counterpart, was succeeded by an active field station and field research projects down to the present decade (resulting, for example, in the fine long-term records for the Devon Island Ice Cap (e.g., Koerner, 2002).…”

Section: The Historical Settingmentioning

confidence: 99%

The McGill Axel Heiberg Expeditions: Reconnaissance Year, 1959

Adams¹

2009

ARCTIC

View full text Add to dashboard Cite

The Devon Island Expedition

Cited by 10 publications

References 0 publications

Nutrient and Carbon Export From a Tidewater Glacier to the Coastal Ocean in the Canadian Arctic Archipelago

Nutrient and Carbon Export From a Tidewater Glacier to the Coastal Ocean in the Canadian Arctic Archipelago

Permafrost and Thermokarst Lake Dynamics in the Old Crow Flats, Northern Yukon, Canada

The McGill Axel Heiberg Expeditions: Reconnaissance Year, 1959

Contact Info

Product

Resources

About