Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway)
Changes in the supply of water and sediment to high‐latitude rivers related to contemporary climate change and glacier fluctuations largely determine the activity of fluvial processes. This study reconstructs fluvial dynamics since the end of the L ittle I ce A ge ( LIA ) in two small, partially gla...
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crwiley:10.1111/bor.12061 2024-06-23T07:50:50+00:00 Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) Owczarek, Piotr Nawrot, Adam Migała, Krzysztof Malik, Ireneusz Korabiewski, Bartosz 2014 http://dx.doi.org/10.1111/bor.12061 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12061 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12061 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 43, issue 2, page 384-402 ISSN 0300-9483 1502-3885 journal-article 2014 crwiley https://doi.org/10.1111/bor.12061 2024-06-13T04:22:30Z Changes in the supply of water and sediment to high‐latitude rivers related to contemporary climate change and glacier fluctuations largely determine the activity of fluvial processes. This study reconstructs fluvial dynamics since the end of the L ittle I ce A ge ( LIA ) in two small, partially glaciated basins in the southern part of S pitsbergen, S valbard A rchipelago. We use a combination of aerial photograph interpretation, field mapping and dendrochronological analysis. Sequences of abandoned channels and glacifluvial terraces are distinctly visible in middle and lower parts of the B rattegg and A rie basins in this area. The advance of glaciers during the LIA in the upper part of the basins led to the development of a braiding pattern and to channel aggradation corresponding to the highest glacifluvial levels. The decreasing activity of these braidplains occurred at the turn of the 19th and 20th centuries, immediately prior to a significant incision period. A second generation of braided channels developed during the first half of the 20th century. Ice‐marginal lake development, less input of fine‐grained sediment to the river channel, and fast incision began from the second half of the 20th century onward. During the last two decades, the main fluvial response to the climatic warming has been contraction of flow within a narrower channel and the abandonment of braidplains. The increased lateral erosion and rate of downcutting and the formation of the most downstream reaches of the modern valley bottom occurred in the 1980s and 1990s. This process was intensified under flood conditions generated by extreme rainfall events. These micro‐scale (small partially glaciated basins) observations concerning the changes of the activity of fluvial processes since the end of LIA may be helpful for the reconstruction of past fluvial changes over longer time scales. Article in Journal/Newspaper Arctic Climate change glacier glacier Svalbard Wiley Online Library Arctic Marginal Lake ENVELOPE(163.500,163.500,-74.600,-74.600) Norway Svalbard Boreas 43 2 384 402 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Changes in the supply of water and sediment to high‐latitude rivers related to contemporary climate change and glacier fluctuations largely determine the activity of fluvial processes. This study reconstructs fluvial dynamics since the end of the L ittle I ce A ge ( LIA ) in two small, partially glaciated basins in the southern part of S pitsbergen, S valbard A rchipelago. We use a combination of aerial photograph interpretation, field mapping and dendrochronological analysis. Sequences of abandoned channels and glacifluvial terraces are distinctly visible in middle and lower parts of the B rattegg and A rie basins in this area. The advance of glaciers during the LIA in the upper part of the basins led to the development of a braiding pattern and to channel aggradation corresponding to the highest glacifluvial levels. The decreasing activity of these braidplains occurred at the turn of the 19th and 20th centuries, immediately prior to a significant incision period. A second generation of braided channels developed during the first half of the 20th century. Ice‐marginal lake development, less input of fine‐grained sediment to the river channel, and fast incision began from the second half of the 20th century onward. During the last two decades, the main fluvial response to the climatic warming has been contraction of flow within a narrower channel and the abandonment of braidplains. The increased lateral erosion and rate of downcutting and the formation of the most downstream reaches of the modern valley bottom occurred in the 1980s and 1990s. This process was intensified under flood conditions generated by extreme rainfall events. These micro‐scale (small partially glaciated basins) observations concerning the changes of the activity of fluvial processes since the end of LIA may be helpful for the reconstruction of past fluvial changes over longer time scales. |
format |
Article in Journal/Newspaper |
author |
Owczarek, Piotr Nawrot, Adam Migała, Krzysztof Malik, Ireneusz Korabiewski, Bartosz |
spellingShingle |
Owczarek, Piotr Nawrot, Adam Migała, Krzysztof Malik, Ireneusz Korabiewski, Bartosz Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) |
author_facet |
Owczarek, Piotr Nawrot, Adam Migała, Krzysztof Malik, Ireneusz Korabiewski, Bartosz |
author_sort |
Owczarek, Piotr |
title |
Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) |
title_short |
Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) |
title_full |
Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) |
title_fullStr |
Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) |
title_full_unstemmed |
Flood‐plain responses to contemporary climate change in small High‐ Arctic basins ( Svalbard, Norway) |
title_sort |
flood‐plain responses to contemporary climate change in small high‐ arctic basins ( svalbard, norway) |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/bor.12061 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fbor.12061 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12061 |
long_lat |
ENVELOPE(163.500,163.500,-74.600,-74.600) |
geographic |
Arctic Marginal Lake Norway Svalbard |
geographic_facet |
Arctic Marginal Lake Norway Svalbard |
genre |
Arctic Climate change glacier glacier Svalbard |
genre_facet |
Arctic Climate change glacier glacier Svalbard |
op_source |
Boreas volume 43, issue 2, page 384-402 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/bor.12061 |
container_title |
Boreas |
container_volume |
43 |
container_issue |
2 |
container_start_page |
384 |
op_container_end_page |
402 |
_version_ |
1802641778965217280 |