Jökulhlaup - a photo on Flickriver

Jökulhlaup

            Icebergs are left perched on dry land after a glacial lake outburst flood drained Summit Lake.  The lake would normally fill the right side of the photo. The lake drainage was caused by the failure of the dam (the Salmon Glacier on the left) containing the glacial lake. Large meltwater channels beneath the Salmon Glacier have enabled rapid drainage under the glacier into the Salmon River. This type of glacial outburst flood is called jökulhlaup,  an Icelandic term that has been adopted in glaciological terminology.  Summit Lake is the largest self-draining, ice-dammed lake in Canada. Until 1961, it contained few icebergs and was stable, overflowing to the north (right top) into the Bowser River valley. The first jökulhlaup occurred in December 1961, after a lengthy period of thinning and retreat of Salmon Glacier, when a subglacial channel developed in the weakened ice dam, allowing the lake to drain suddenly. This flood and two others in 1965 and 1967 caused major damage to the road system in the Salmon River valley south of the lake. Since 1965, with three exceptions, Summit Lake has drained annually. Rapid water-level fluctuations associated with the annual emptying and refilling of Summit Lake have generated large numbers of icebergs, derived from the Salmon Glacier dam. The present jökulhlaup cycle is likely to continue either until the glacier readvances or until it retreats to the point that it no longer forms an effective seal to dam the lake. (Source: Canadian Journal of Earth Sciences, March 1993) The lake has drained to the left underneath the Salmon Glacier. The stream you see on the edge of the glacial rubble on the top right is the inflow to Summit Lake, not the outflow path. The photo is a drone panorama from 4 vertical files taken at dusk.
   

Taken in: Canada / British Columbia / Stewart / Granduc (show map)

Taken on: July 23, 2023

Tags:

Alaska Boundary Range

British Columbia

Canada

Coast Mountains

Coast Range

Salmon Glacier

Summit Lake

alpine

drained lake

drone

drone panorama

drone photography

dusk

glacial outburst flood

glacial retreat

glacier

ice

iceberg

jökulhlaup

lake

landscape

mountain

mountain range

panorama

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Sets appears in: • Explored • 2023-6 Canada

Groups appears in: • Landscape • Aerials more » • Ice is nice! • Dusk & Dawn - Sun below the horizon! • Canada • Glaciers, Icefields and Icebergs • Flickr Nature • Landscape Exploration • Awesome Nature • Alpine Landscapes • Glaciers - Worldwide • Landscapes of the World • Inspirational Landscapes • Drone Photography • in explore • ~The View from Above (No AI, CGI or Small World) • RUNNING LANDSCAPES • Drone Shots • ALL AMERICAS • WONDERS OF PHOTOGRAPHY IN GENERAL.MARAVILLAS DE LA FOTOGRAFIA EN « less

Camera: DJI FC3582, f/1.7, 1/100 sec, 6.7mm, ISO 100 (more info) (hide info)

Camera:	DJI FC3582
Lens:	6.7 mm f/1.7
Aperture:	f/1.7
Exposure Time:	0.01 sec (1/100)
Focal Length:	6.7mm
ISO:	100
Exposure Bias:	-1 EV
Flash:	No Flash
Exposure Program:	Manual
Exposure Mode:	Manual
Metering Mode:	Average
White Balance:	Auto
Light Source:	Cloudy
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 12.4 (Macintosh)
Show full info

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