Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005
Abstract Glaciers are key indicators for climate change. Mass balance studies form the important link between advances and retreats of glaciers to changes in climate. Mass balance studies were performed in the balance year 2004/05 on Bogerbreen as part of my Master thesis. Bogerbreen is a valley gla...
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ftoslouniv:oai:www.duo.uio.no:10852/12414 2023-05-15T16:22:12+02:00 Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 Neumann, Ulrich Jon Ove M. Hagen, Hanne H. Christiansen 2006 http://hdl.handle.net/10852/12414 http://urn.nb.no/URN:NBN:no-14313 eng eng http://urn.nb.no/URN:NBN:no-14313 Neumann, Ulrich. Climate - glacier links on Bogerbreen, Svalbard. Hovedoppgave, University of Oslo, 2006 http://hdl.handle.net/10852/12414 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Neumann, Ulrich&rft.title=Climate - glacier links on Bogerbreen, Svalbard&rft.inst=University of Oslo&rft.date=2006&rft.degree=Hovedoppgave URN:NBN:no-14313 50951 070186189 Fulltext https://www.duo.uio.no/bitstream/handle/10852/12414/1/Msc_Ullrich_Neumann_electronicVersion.pdf VDP::450 Master thesis Hovedoppgave 2006 ftoslouniv 2020-06-21T08:42:07Z Abstract Glaciers are key indicators for climate change. Mass balance studies form the important link between advances and retreats of glaciers to changes in climate. Mass balance studies were performed in the balance year 2004/05 on Bogerbreen as part of my Master thesis. Bogerbreen is a valley glacier with a size of 3.3 km² located in central Spitsbergen, Svalbard at 78 degrees north and 15 degrees east. The direct glaciological method was applied to measure winter mass balance using snow soundings and snow pit studies. Summer balance was obtained from stake readings. The use of artificial reference horizons and shallow ice cores helped to estimate superimposed ice formation. In addition to the primary mass balance components, air temperatures were recorded on site as well as daily glacier photographs were collected, stake and glacier surface surveys performed. Ice surface velocities were measured and I generated a high resolution digital terrain model and an orthophoto of the study site. Winter balance 2004/05 was calculated to be 0.55 ± 0.08 m water equivalent. Redistribution of snow is a major control on the spatial distribution of the winter mass balance. In a more regional scale it is likely that wind drifted snow is deposited on Bogerbreen and adds significantly to the winter mass balance beside winter precipitation. Summer mass balance were calculated to - 1.35 ± 0.24 m water equivalent. Ablation decreases with increase in elevation most likely due to the influence of turbulent heat fluxes. At the middle part of the glacier, albedo effects and shading lead to a distinctive lateral summer balance asymmetry. It is likely that the spatial distribution of winter snow plays a major role causing this lateral asymmetry. The resulting net mass balance was negative in the balance year 2004/05, with - 0.80 ± 0.20 m water equivalent. Mean geodetic net balances for the period 1990 to 2003 and previous direct measured balances indicate that Bogerbreen has not been in balance with the climate for the last decades. This is in accordance with findings elsewhere on Spitsbergen. Master Thesis glacier Svalbard Spitsbergen Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Bogerbreen ENVELOPE(15.633,15.633,78.133,78.133) Svalbard |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
topic |
VDP::450 |
spellingShingle |
VDP::450 Neumann, Ulrich Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 |
topic_facet |
VDP::450 |
description |
Abstract Glaciers are key indicators for climate change. Mass balance studies form the important link between advances and retreats of glaciers to changes in climate. Mass balance studies were performed in the balance year 2004/05 on Bogerbreen as part of my Master thesis. Bogerbreen is a valley glacier with a size of 3.3 km² located in central Spitsbergen, Svalbard at 78 degrees north and 15 degrees east. The direct glaciological method was applied to measure winter mass balance using snow soundings and snow pit studies. Summer balance was obtained from stake readings. The use of artificial reference horizons and shallow ice cores helped to estimate superimposed ice formation. In addition to the primary mass balance components, air temperatures were recorded on site as well as daily glacier photographs were collected, stake and glacier surface surveys performed. Ice surface velocities were measured and I generated a high resolution digital terrain model and an orthophoto of the study site. Winter balance 2004/05 was calculated to be 0.55 ± 0.08 m water equivalent. Redistribution of snow is a major control on the spatial distribution of the winter mass balance. In a more regional scale it is likely that wind drifted snow is deposited on Bogerbreen and adds significantly to the winter mass balance beside winter precipitation. Summer mass balance were calculated to - 1.35 ± 0.24 m water equivalent. Ablation decreases with increase in elevation most likely due to the influence of turbulent heat fluxes. At the middle part of the glacier, albedo effects and shading lead to a distinctive lateral summer balance asymmetry. It is likely that the spatial distribution of winter snow plays a major role causing this lateral asymmetry. The resulting net mass balance was negative in the balance year 2004/05, with - 0.80 ± 0.20 m water equivalent. Mean geodetic net balances for the period 1990 to 2003 and previous direct measured balances indicate that Bogerbreen has not been in balance with the climate for the last decades. This is in accordance with findings elsewhere on Spitsbergen. |
author2 |
Jon Ove M. Hagen, Hanne H. Christiansen |
format |
Master Thesis |
author |
Neumann, Ulrich |
author_facet |
Neumann, Ulrich |
author_sort |
Neumann, Ulrich |
title |
Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 |
title_short |
Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 |
title_full |
Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 |
title_fullStr |
Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 |
title_full_unstemmed |
Climate - glacier links on Bogerbreen, Svalbard : Glacier mass balance investigations in central Spitsbergen 2004 / 2005 |
title_sort |
climate - glacier links on bogerbreen, svalbard : glacier mass balance investigations in central spitsbergen 2004 / 2005 |
publishDate |
2006 |
url |
http://hdl.handle.net/10852/12414 http://urn.nb.no/URN:NBN:no-14313 |
long_lat |
ENVELOPE(15.633,15.633,78.133,78.133) |
geographic |
Bogerbreen Svalbard |
geographic_facet |
Bogerbreen Svalbard |
genre |
glacier Svalbard Spitsbergen |
genre_facet |
glacier Svalbard Spitsbergen |
op_relation |
http://urn.nb.no/URN:NBN:no-14313 Neumann, Ulrich. Climate - glacier links on Bogerbreen, Svalbard. Hovedoppgave, University of Oslo, 2006 http://hdl.handle.net/10852/12414 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Neumann, Ulrich&rft.title=Climate - glacier links on Bogerbreen, Svalbard&rft.inst=University of Oslo&rft.date=2006&rft.degree=Hovedoppgave URN:NBN:no-14313 50951 070186189 Fulltext https://www.duo.uio.no/bitstream/handle/10852/12414/1/Msc_Ullrich_Neumann_electronicVersion.pdf |
_version_ |
1766010167554473984 |