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Sunday, July 26, 2020 | History

2 edition of Glacier-dammed lake investigations in the Hullet lake area, South Greenland found in the catalog.

Glacier-dammed lake investigations in the Hullet lake area, South Greenland

A. G. Dawson

Glacier-dammed lake investigations in the Hullet lake area, South Greenland

by A. G. Dawson

  • 142 Want to read
  • 5 Currently reading

Published by Nyt Nordisk Forlag in Copenhagen .
Written in English

    Subjects:
  • Glacial landforms -- Greenland.

  • Edition Notes

    Bibliography: p. 22.

    StatementAlastair G. Dawson.
    SeriesMeddelelser om Grønland -- 11
    The Physical Object
    Pagination24 p. :
    Number of Pages24
    ID Numbers
    Open LibraryOL22098500M
    ISBN 108717051193

    at Long Lost Lake, –, White Earth Indian Reservation, Clearwater County, Minnesota By Victoria G. Christensen and Andrea L. Bergman Abstract Long Lost Lake, a closed-basin lake in Clearwater County, Minnesota, has had a substantial rise in lake level since The increased level and surface area of the lake has led to the. In , Greenland's North Lake, a square-mile (square-kilometer) supraglacial meltwater lake, drained almost 12 billion gallons of water in less than two hours.

    That’s how, in the mid s, researchers were able to confirm the presence of Lake Vostok, a 4,square-mile subglacial lake buried near the South Pole. It’s that latter approach that helped scientists detect most of the new—albeit far smaller—subglacial lakes in Greenland. COLUMBUS, Ohio—Researchers who are building the highest-resolution map of the Greenland Ice Sheet to date have made a surprising discovery: two lakes of meltwater that pooled beneath the ice and rapidly drained lake once held billions of gallons of water and emptied to form a mile-wide crater in just a few weeks. The other lake has fill.

      The first lake, which previously held nearly 7 billion gallons of water from melting ice caps, left behind a crater 2 kilometers ( miles) across and around 70 meters ( feet) deep. The area has seen one historic period of drought in the s and a period of above normal precipitation that led to widespread flooding in the late s. It was reported that the only lakes with enough water to support fisheries in the region during were Blue Dog, Enemy Swim, Pickerel, and Roy Lakes.


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Glacier-dammed lake investigations in the Hullet lake area, South Greenland by A. G. Dawson Download PDF EPUB FB2

Glacier-dammed lake investigations in the Hullet lake area, South Greenland. Copenhagen: Kommissionen for videnskabelige Undersøgelser i Grønland, (OCoLC) Document Type: Book: All Authors / Contributors: A G Dawson. Jökulhlaups in and from an ice-dammed lake at the northern margin of Russell Glacier, West Greenland, marked the onset of a renewed jökulhlaup cycle after 20 years of stability.

We present a record of successive ice-dammed lake drainage events and associated ice-margin dynamics spanning ∼25 by: Glacier dammed lakes are formed when a glacier blocks the flow of water out of a tributary valley. Throughout the seasons rainfall, rainfall runoff, snowfall, snow melt and glacier melt all accumulate in the lake.

At a semi-regular interval, South Greenland book differs for each lake, the lake begins a self-dumping process. This process begins when the lake. The occasional or recurrent release of the water stored within ice-dammed lakes can effect significant geomorphic change in glaciated environments (Hydrology of Jökulhlaups).Ice-dammed lakes can form supraglacially, subglacially, or ice-marginally and can be classified by their position in relation to the damming glacierand the surrounding landscape (e.g., Hutchinson, ; Tweed and.

INVESTIGATIONS ATLAS HA GLACIER DAMMED LAKES AND OUTBURST FLOODS IN ALASKA BY Austin Post and Lawrence R. Mayo h 4 INTRODUcrION Glaciers in Alaska cover an area of ab square kilometers (28, square miles). They are most highly concentrated along the Pacific Coast and in the south-central part of the State.

Lake Hullet situated at 61° 21′N, 45° 10′ W and 28 km NE of Narssarssuaq in Johan Dahl Land is one of the biggest ice-dammed lakes in south Greenland (Weidick, ).

It drains primarily through Sydgletscher, which is unusual for flowing up-valley, i.e. with a retrograde bed slope, but also through the Kiagtût Sermiat glacier with a. NWS data show that the Snow Glacier Dammed Lake releases every two to three years, usually from August to December.

The last time it released was in. glacier dammed lake water levels. Glacier-dammed lakes often release in the fall months, but can release as early as mid-summer. Periodic summer/fall photographs are used to document lake levels for threat assessment.

The primary lakes southcentral within Alaska requiring regular reconnaissance are the Snow, Skilak and Moose lakes. A Season of Research on Glacier-Dammed Lakes By Carolyn Rosner Rappelling down rock cliffs, rafting across glacial lakes, and traversing icy crevasses, all in the presence of a massive, ever-changing glacier – it's all part of the job for glaciologists monitoring glacial outburst floods (also known as jökulhlaups) in Alaska.

Glacier dammed lakes in south-central and southeastern Alaska and in adjacent Canada which drain into rivers entering Alaska are included in this study.

Such lakes are numerous in this area; glacier dammed lakes have been plotted on the maps on sheets 1. Hullet lake area, South Greenland. We present results from an investigation of relative sea-level changes in the Qaqortoq area in south Greenland from c cal.

yr BP to the present. A.G. DawsonGlacier-dammed lake investigations in the Hullet lake area, South Greenland. Meddelelser om Grønland Meddelelser om Grønland Geoscience, 11 (), p. KEY POINTS/HIGHLIGHTSTwo rapid ice-dammed lake drainage events gauged and ice dam geometry measured.A melt enlargement model is developed to examine the evolution of drainage mechanism(s).Lake temperature dominated conduit melt enlargement and we hypothesize a flotation logical and hydraulic factors that control the timing and mechanisms of glacier lake.

Sheet of ill. titled: Photographs illustrating the variability of glacier dammed lakes. Description: 1 map on 2 sheets: color ; x cm, sheets 76 x cm and 86 x cm + 16 illustrations (20 x 20 cm, on sheet x 96 cm) folded in envelope 30 x 24 cm + text (10 pages ; 27 cm).

InGreenland's North Lake, a square-mile ( square kilometers) supraglacial meltwater lake, drained almost 12 billion gallons of water in less than two hours. In a study published two. Dawson, A. Glacier-dammed lake investigations in the Hullet Lake area, south Greenland.

Meddelelser om Grønland, Geoscie 3 - Google Scholar. Overview of the location in Greenland (inset), the area of Qorlortorssup tasia and the ice-dammed lake, with the adjacent ice cap (white) and the fjord system (light grey); lakes are shown in.

The Greenland ice sheet, one of the biggest contributors to rising seas, released the equivalent of million Olympic-size swimming pools into. The ice-dammed lake 12 miles up the glacier from the terminus released its water in a Glacial Lake Outburst Flood (GLOF), flooding the popular lagoon at the terminus and creating a.

At the time of its designation, Lake George was the largest glacier-dammed lake and one of the most consistent self-dumping lakes in North America. The lake emptied almost annually for 49 years before When the lake outlet was blocked by the Knik Glacier, the lake swelled with water until summer when the dam broke and the water dumped in a.

Ostgletscher, near Qorqup Sermia Glacier, Southwest Greenland. Twenty-four members of the Brathay Exploration Group under my leadership visited southwest Greenland from July 26 to August The members were senior boys from schools, undergraduates and young men from industry and so the age-range was from 17 to The lakes that form atop Greenland's Ice Sheet, called supraglacial lakes, can rapidly, and mysteriously, drain billions of gallons of water in a matter of hours.

Here's a look at the stunning icy.If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from .