An Exceptional Storm and Its Effects in the Canadian High Arctic

Cogley, J. Graham; McCann, S. B.

doi:10.2307/1550613

Cited by 51 publications

(38 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Courtin and Labine (1977), for example, reporting on a continuing program to study the microclimate of Truelove Lowland on the northern coast of Devon Island, indicated a measured value for annual net radiation of 17.8 kly, similar in magnitude to those values indicated in the northwestern islands.…”

Section: J B Maxwellmentioning

confidence: 77%

Climatic Regions of the Canadian Arctic Islands

Maxwell¹

1981

ARCTIC

133

View full text Add to dashboard Cite

ABSTRACT. As a result of a comprehensive assessment of the climate of the Canadian Arctic Islands and adjacent waters, five climatic regions were identified. The regional boundaries were delineated by an analysis of the influence of the major climatic controls while further regional subdivisions were arrived at through consideration of the fields of the standard observed meteorological elements. Short discussions of the climatic characteristics of each sub-region are given and tables outlining values of selected climatic elements are presented. A brief discussion of climatic change across the entire area is included.

show abstract

Section: J B Maxwellmentioning

confidence: 77%

Climatic Regions of the Canadian Arctic Islands

Maxwell¹

1981

ARCTIC

133

View full text Add to dashboard Cite

show abstract

“…The 9720-yr date is the age of another single poplar leaf from the overlying channel sands. alluviation probably was caused by a combination of increased permafrost melting and heightened hillslope erosion, which perhaps was triggered by increased summer rainfall on a landscape with discontinuous vegetation cover (cf., Cogley and McCann, 1976;Edlund et al, 1989).…”

Section: Synthesismentioning

confidence: 99%

Responses of an arctic landscape to Lateglacial and early Holocene climatic changes: the importance of moisture

Mann

Peteet

Reanier³

et al. 2002

Quaternary Science Reviews

116

132

View full text Add to dashboard Cite

Many of the physical and biological processes that characterize arctic ecosystems are unique to high latitudes, and their sensitivities to climate change are poorly understood. Stratigraphic records of land-surface processes and vegetation change in the Arctic Foothills of northern Alaska reveal how tundra landscapes responded to climatic changes between 13,000 and 8000 14 C yr BP. Peat deposition began and shrub vegetation became widespread ca. 12,500 14 C yr BP, probably in response to the advent of warmer and wetter climate. Increased slope erosion caused rapid alluviation in valleys, and Populus trees spread northward along braided floodplains before 11,000 14 C yr BP. Lake levels fell and streams incised their floodplains during the Younger Dryas (YD) (11,000-10,000 14 C yr BP). A hiatus in records of Populus suggest that its geographic range contracted, and pollen records of other species suggest a cooler and drier climate during this interval. Basal peats dating to the YD are rare, suggesting that rates of paludification slowed. Immediately after 10,000 14 C yr BP, lake levels rose, streams aggraded rapidly again, intense solifluction occurred, and Populus re-invaded the area. Moist acidic tundra vegetation was widespread by 8500 14 C yr BP along with wet, organic-rich soils. Most of these landscape-scale effects of climatic change involved changes in moisture. Although low temperature is the most conspicuous feature of arctic climate, shifts in effective moisture may be the proximate cause for many of the impacts that climate change has in arctic regions. r

show abstract

“…Runoff decreases once the snow cover has disappeared, and the baseflow period is only occasionally interrupted by streamflow responses to summer precipitation events. Exceptional summer rainfall events in the High Arctic infrequently generate dramatic hydrologic responses (e.g., Adams, 1966;Cogley and McCann, 1976). Mean monthly air temperatures at Resolute Bay are only positive during July and August (Table 1), with daily air temperatures on average below 0°C until 15 June and after 25 August (Maxwell, 1981).…”

Section: Climate and Hydrology Of Cornwallis Islandmentioning

confidence: 99%

“…It is possible that suspended sediment transport to Lake Sophia remains relatively constant from year-to-year, despite different levels and intensities of snowmelt and runoff, simply due to insufficient sediment supply in the watershed. Summer rainfall events can have considerable effects on sediment transport (e.g., Cogley and McCann, 1976), as they potentially affect the entire watershed and access sediment sources otherwise protected from fluvial erosion. In 1994, 9% of the annual suspended sediment load was transported in response to summer rainfall events.…”

Section: Temporal Considerationsmentioning

confidence: 99%

Streamflow and Suspended Sediment Transfer to Lake Sophia, Cornwallis Island, Nunavut, Canada

Braun

Hardy

Bradley

et al. 2000

Arctic, Antarctic, and Alpine Research

View full text Add to dashboard Cite

To ascertain the climatic controls on sediment transport to Lake Sophia, Comwallis Island, Nunavut, Canada, we made detailed hydrological and meteorological measurements in the Sophia River watershed through the 1994 melt season. Streamflow and suspended sediment transport are limited, on an annual time scale, by the supply of snow and sediment in the watershed. Suspended sediment yield from the watershed was only 0.46 t k:m-2 , which is lower than any previously published yield for a stream in the High Arctic. Snowmelt rgnoff accounted for 88% of the annual suspended sediment load, whereas 6 and 9% were transported in response to a slushflow event and summer rainfall, respectively. These measurements provide no direct evidence that modem-day sediment delivery to Lake Sophia is related to fluctuations in air temperature, which has implications for the paleoenvironmental signal preserved in Lake Sophia's laminated sediments. We suggest that on-site sediment transport studies are necessary to establish the relationships among geology, geography, climate, and hydrology unique to each watershed-lake system and need to be an integral part of any calibration attempt. Additional years of data are needed however to define the interannual variability of streamflow and sediment transport in response to climate.

show abstract

An Exceptional Storm and Its Effects in the Canadian High Arctic

Cited by 51 publications

References 2 publications

Climatic Regions of the Canadian Arctic Islands

Climatic Regions of the Canadian Arctic Islands

Responses of an arctic landscape to Lateglacial and early Holocene climatic changes: the importance of moisture

Streamflow and Suspended Sediment Transfer to Lake Sophia, Cornwallis Island, Nunavut, Canada

Contact Info

Product

Resources

About