Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard
The definitive version is found at: http://onlinelibrary.wiley.com/ Copyright Wiley-Blackwell Enhanced delivery of water-saturated, ice-marginal sediments to the glacier surface is a response to glacier thinning that has the potential to increase both levels of sediment transfer through the glacier...
Main Authors: | , , , |
---|---|
Other Authors: | , , , |
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | http://hdl.handle.net/2299/9457 http://www.scopus.com/inward/record.url?scp=78650042676&partnerID=8YFLogxK |
id |
ftunivhertford:oai:uhra.herts.ac.uk:2299/9457 |
---|---|
record_format |
openpolar |
spelling |
ftunivhertford:oai:uhra.herts.ac.uk:2299/9457 2024-06-02T07:59:50+00:00 Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard Porter, Philip R. Vatne, Geir Ng, Felix Irvine-Fynn, Tristram D. L. Department of Human and Environmental Sciences School of Life and Medical Sciences Health & Human Sciences Research Institute Geography, Environment and Agriculture 2010 13 1329994 http://hdl.handle.net/2299/9457 http://www.scopus.com/inward/record.url?scp=78650042676&partnerID=8YFLogxK eng eng Geografiska Annaler: Series A, Physical Geography Porter , P R , Vatne , G , Ng , F & Irvine-Fynn , T D L 2010 , ' Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard ' , Geografiska Annaler: Series A, Physical Geography , vol. 92A , no. 4 , pp. 437-449 . https://doi.org/10.1111/j.1468-0459.2010.00406.x 0435-3676 http://hdl.handle.net/2299/9457 http://www.scopus.com/inward/record.url?scp=78650042676&partnerID=8YFLogxK ice-marginal paraglacial suspended sediment 2010 ftunivhertford 2024-05-07T23:37:30Z The definitive version is found at: http://onlinelibrary.wiley.com/ Copyright Wiley-Blackwell Enhanced delivery of water-saturated, ice-marginal sediments to the glacier surface is a response to glacier thinning that has the potential to increase both levels of sediment transfer through the glacier hydrological system and total basin sediment yields. Preliminary observations made during summer 2007 at Austre Br circle divide ggerbreen, Svalbard, confirm that ice-marginal debris flows in the upper reaches of the glacier are actively delivering sediments to the glacier surface, which may then be flushed into the glacier's hydrological system. During a four-day observation period, several stochastic pulses in water turbidity were observed at a single portal where solely supra- and englacial drainage emerge at the glacier margin. The erratic suspended sediment fluxes were hypothesized to originate from ice-marginal sources. Quantitative analysis of continuous turbidity and discharge data confirm that discharge is not driving these turbidity pulses and, combined with observational data, that the most likely origin is the delivery of water-saturated sediments to the glacier surface from ice-marginal, debris flows with subsequent transfer to the portal via the glacial drainage system. These observations illustrate the potential importance of the paraglacial component to the overall sediment cascade of deglaciating basins and highlight the need for careful interpretation of turbidity records, where stochastic pulses in turbidity may be attributed to sources and processes other than ice-marginal sediment inputs. Peer reviewed Other/Unknown Material Arctic Arctic glacier Svalbard University of Hertfordshire: UH Research Archive Arctic Svalbard The Portal ENVELOPE(159.167,159.167,-78.100,-78.100) |
institution |
Open Polar |
collection |
University of Hertfordshire: UH Research Archive |
op_collection_id |
ftunivhertford |
language |
English |
topic |
ice-marginal paraglacial suspended sediment |
spellingShingle |
ice-marginal paraglacial suspended sediment Porter, Philip R. Vatne, Geir Ng, Felix Irvine-Fynn, Tristram D. L. Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard |
topic_facet |
ice-marginal paraglacial suspended sediment |
description |
The definitive version is found at: http://onlinelibrary.wiley.com/ Copyright Wiley-Blackwell Enhanced delivery of water-saturated, ice-marginal sediments to the glacier surface is a response to glacier thinning that has the potential to increase both levels of sediment transfer through the glacier hydrological system and total basin sediment yields. Preliminary observations made during summer 2007 at Austre Br circle divide ggerbreen, Svalbard, confirm that ice-marginal debris flows in the upper reaches of the glacier are actively delivering sediments to the glacier surface, which may then be flushed into the glacier's hydrological system. During a four-day observation period, several stochastic pulses in water turbidity were observed at a single portal where solely supra- and englacial drainage emerge at the glacier margin. The erratic suspended sediment fluxes were hypothesized to originate from ice-marginal sources. Quantitative analysis of continuous turbidity and discharge data confirm that discharge is not driving these turbidity pulses and, combined with observational data, that the most likely origin is the delivery of water-saturated sediments to the glacier surface from ice-marginal, debris flows with subsequent transfer to the portal via the glacial drainage system. These observations illustrate the potential importance of the paraglacial component to the overall sediment cascade of deglaciating basins and highlight the need for careful interpretation of turbidity records, where stochastic pulses in turbidity may be attributed to sources and processes other than ice-marginal sediment inputs. Peer reviewed |
author2 |
Department of Human and Environmental Sciences School of Life and Medical Sciences Health & Human Sciences Research Institute Geography, Environment and Agriculture |
author |
Porter, Philip R. Vatne, Geir Ng, Felix Irvine-Fynn, Tristram D. L. |
author_facet |
Porter, Philip R. Vatne, Geir Ng, Felix Irvine-Fynn, Tristram D. L. |
author_sort |
Porter, Philip R. |
title |
Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard |
title_short |
Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard |
title_full |
Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard |
title_fullStr |
Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard |
title_full_unstemmed |
Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard |
title_sort |
ice-marginal sediment delivery to the surface of a high-arctic glacier: austre broggerbreen, svalbard |
publishDate |
2010 |
url |
http://hdl.handle.net/2299/9457 http://www.scopus.com/inward/record.url?scp=78650042676&partnerID=8YFLogxK |
long_lat |
ENVELOPE(159.167,159.167,-78.100,-78.100) |
geographic |
Arctic Svalbard The Portal |
geographic_facet |
Arctic Svalbard The Portal |
genre |
Arctic Arctic glacier Svalbard |
genre_facet |
Arctic Arctic glacier Svalbard |
op_relation |
Geografiska Annaler: Series A, Physical Geography Porter , P R , Vatne , G , Ng , F & Irvine-Fynn , T D L 2010 , ' Ice-marginal sediment delivery to the surface of a high-arctic glacier: Austre Broggerbreen, Svalbard ' , Geografiska Annaler: Series A, Physical Geography , vol. 92A , no. 4 , pp. 437-449 . https://doi.org/10.1111/j.1468-0459.2010.00406.x 0435-3676 http://hdl.handle.net/2299/9457 http://www.scopus.com/inward/record.url?scp=78650042676&partnerID=8YFLogxK |
_version_ |
1800743908335943680 |