Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery
The glacial geomorphology of Soviet Karelia was mapped using Landsat satellite imagery. The data of the multispectral scanner were processed using the photographic image enhancement and color combination technique for visual interpretation. Glaciofluvial landforms, streamlined formations, end mora...
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Geographical Society of Finland
1985
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fttriple:oai:gotriple.eu:oai:doaj.org/article:232de9785ad04de68239ef4aa7385e53 2023-05-15T16:40:19+02:00 Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery Mikko Punkari 1985-01-01 https://doaj.org/article/232de9785ad04de68239ef4aa7385e53 en eng Geographical Society of Finland 1798-5617 https://doaj.org/article/232de9785ad04de68239ef4aa7385e53 undefined Fennia: International Journal of Geography, Vol 163, Iss 1 (1985) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 1985 fttriple 2023-01-22T18:11:22Z The glacial geomorphology of Soviet Karelia was mapped using Landsat satellite imagery. The data of the multispectral scanner were processed using the photographic image enhancement and color combination technique for visual interpretation. Glaciofluvial landforms, streamlined formations, end moraines and hummocky moraine tracts were mapped, along with the type and amount of glacial erosion. As a result of the work, the glaciomorphological data were greatly increased compared with maps available earlier. The direction and strength of the glacial flow and the stages of deglaciation were interpreted on the basis of the maps compiled. Conclusions were drawn as to the thermal regime of the ice sheet and the relations between the glacial dynamics and morphology. During the Alleröd Substage, the main direction of the glacial flow was from the northwest, running radially from the Scandinavian mountain range. Later, the direction shifted about 30' more to the west, with the dome being situated in northern Sweden. Locally, near the interlobate zones, the flow shifted as much as 90'. The existence of the oriented elements representing earlier and later flow directions in any area supports the theory that the ice sheet had a melting bed in at least two different zones during the deglaciation. These zones were probably time‑transgressive when the volume of the ice sheet diminished. Extensive marginal formations, evidently belonging to the Salpausselkä (Younger Dryas) Substage, were discovered. The ice margin was situated during the First Salpausselkä phase near the present White Sea coast. In the areas of the active ice lobes, there exist fan‑shaped drumlin fields and landscapes of intensive areal scouring. Between the lobes, there occur remarkable glaciofluvial interlobate formations, like the Kalevala and Syamozero complexes. In the interlobate areas, hummocky and transverse moraines are common and streamlined formations as well as landscapes of glacial erosion are rare. The glacial dynamics of the ice sheet ... Article in Journal/Newspaper Ice Sheet Northern Sweden White Sea Unknown White Sea |
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geo envir Mikko Punkari Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery |
topic_facet |
geo envir |
description |
The glacial geomorphology of Soviet Karelia was mapped using Landsat satellite imagery. The data of the multispectral scanner were processed using the photographic image enhancement and color combination technique for visual interpretation. Glaciofluvial landforms, streamlined formations, end moraines and hummocky moraine tracts were mapped, along with the type and amount of glacial erosion. As a result of the work, the glaciomorphological data were greatly increased compared with maps available earlier. The direction and strength of the glacial flow and the stages of deglaciation were interpreted on the basis of the maps compiled. Conclusions were drawn as to the thermal regime of the ice sheet and the relations between the glacial dynamics and morphology. During the Alleröd Substage, the main direction of the glacial flow was from the northwest, running radially from the Scandinavian mountain range. Later, the direction shifted about 30' more to the west, with the dome being situated in northern Sweden. Locally, near the interlobate zones, the flow shifted as much as 90'. The existence of the oriented elements representing earlier and later flow directions in any area supports the theory that the ice sheet had a melting bed in at least two different zones during the deglaciation. These zones were probably time‑transgressive when the volume of the ice sheet diminished. Extensive marginal formations, evidently belonging to the Salpausselkä (Younger Dryas) Substage, were discovered. The ice margin was situated during the First Salpausselkä phase near the present White Sea coast. In the areas of the active ice lobes, there exist fan‑shaped drumlin fields and landscapes of intensive areal scouring. Between the lobes, there occur remarkable glaciofluvial interlobate formations, like the Kalevala and Syamozero complexes. In the interlobate areas, hummocky and transverse moraines are common and streamlined formations as well as landscapes of glacial erosion are rare. The glacial dynamics of the ice sheet ... |
format |
Article in Journal/Newspaper |
author |
Mikko Punkari |
author_facet |
Mikko Punkari |
author_sort |
Mikko Punkari |
title |
Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery |
title_short |
Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery |
title_full |
Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery |
title_fullStr |
Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery |
title_full_unstemmed |
Glacial geomorphology and dynamics in Soviet Karelia interpreted by means of satellite imagery |
title_sort |
glacial geomorphology and dynamics in soviet karelia interpreted by means of satellite imagery |
publisher |
Geographical Society of Finland |
publishDate |
1985 |
url |
https://doaj.org/article/232de9785ad04de68239ef4aa7385e53 |
geographic |
White Sea |
geographic_facet |
White Sea |
genre |
Ice Sheet Northern Sweden White Sea |
genre_facet |
Ice Sheet Northern Sweden White Sea |
op_source |
Fennia: International Journal of Geography, Vol 163, Iss 1 (1985) |
op_relation |
1798-5617 https://doaj.org/article/232de9785ad04de68239ef4aa7385e53 |
op_rights |
undefined |
_version_ |
1766030705998954496 |