Quantification and interpretation of glacier elevation changes
Glaciers, ice caps and ice sheets constitute a large reservoir in the global hydrological cycle and provide a coupling between climate and sea-level. Observations of glacial change is important for constraining their contribution to sea-level fluctuations and to better understand the interactions be...
Published in: | Journal of Geophysical Research |
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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2011
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Online Access: | http://hdl.handle.net/10852/12326 http://urn.nb.no/URN:NBN:no-28425 |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
topic |
VDP::450 |
spellingShingle |
VDP::450 Nuth, Christopher Quantification and interpretation of glacier elevation changes |
topic_facet |
VDP::450 |
description |
Glaciers, ice caps and ice sheets constitute a large reservoir in the global hydrological cycle and provide a coupling between climate and sea-level. Observations of glacial change is important for constraining their contribution to sea-level fluctuations and to better understand the interactions between glaciers and climate. This thesis focuses on glacier observations through measurements of elevation change. The research in this thesis is oriented towards the methodological detection of elevation changes using remote sensing techniques. The quality of glacier elevation change measurements is dependent on controlling the potential errors and biases within the data. Therefore, one aspect is focused on a universal co-registration method for elevation products and further identification and correction of biases that remain, specifically in satellite stereo products. For glaciological studies, elevation changes require conversion into volume and mass changes. This is sometimes complicated when the data available is not spatially continuous and/or temporally consistent. Therefore, another aspect of this thesis explores methods for estimating regional glacier volume change. Specifically, Svalbard glacial contribution to sea-level has been estimated using regionalization techniques from scattered elevation measurements over roughly two time epochs. We observed that Svalbard glaciers over the past few decades have had a negative mass balance, contributing approximately 0.026 mm per year to the oceans. During the past few years, the sea-level contribution from Svalbard glaciers decreased slightly to 0.013 mm per year. Interpretations of elevation changes are convoluted by their dependence on climatic and dynamic forces operating on glacier systems. The last aspect of this thesis experiments with surface mass balance modelling for quantifying the climatic component of an elevation change. Combining this with observed elevation changes using theory of mass continuity can yield estimates of the calving flux of icebergs into the ocean. We observed on one particular fast flowing glacier in Svalbard that the average calving flux in the 1966-1990 epoch increased in the 1990-2007 epoch. |
author2 |
Jack Kohler, Jon Ove Hagen, Thomas Vikhamar Schuler, Andreas Kääb |
format |
Doctoral or Postdoctoral Thesis |
author |
Nuth, Christopher |
author_facet |
Nuth, Christopher |
author_sort |
Nuth, Christopher |
title |
Quantification and interpretation of glacier elevation changes |
title_short |
Quantification and interpretation of glacier elevation changes |
title_full |
Quantification and interpretation of glacier elevation changes |
title_fullStr |
Quantification and interpretation of glacier elevation changes |
title_full_unstemmed |
Quantification and interpretation of glacier elevation changes |
title_sort |
quantification and interpretation of glacier elevation changes |
publishDate |
2011 |
url |
http://hdl.handle.net/10852/12326 http://urn.nb.no/URN:NBN:no-28425 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
glacier Journal of Glaciology Svalbard The Cryosphere The Cryosphere Discussions |
genre_facet |
glacier Journal of Glaciology Svalbard The Cryosphere The Cryosphere Discussions |
op_relation |
Paper I Nuth C., Moholdt G., Kohler J., Hagen J.O., Kääb A (2010) Svalbard glacier elevation changes and contribution to sea level rise. Journal of Geophysical Reasearch- Earth Surface. 115, F01008 http://dx.doi.org/10.1029/2008JF001223 Paper II Moholdt G., Nuth C., Hagen J.O., Kohler J. (2010) Recent elevation changes of Svalbard glaciers derived from ICESat laser altimetry. Remote Sensing of Environment. 114(11), 15 November 2010, Pages 2756-2767. The paper is removed from the thesis in DUO due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1016/j.rse.2010.06.008 Paper III Nuth, C. and Kääb, A. (2010) What is in an elevation difference? Accuracy and corrections of satellite elevation data sets for quantification of glacier changes. Published under a Creative Commons Attribution License. The Cryosphere Discussions. 4, 2013-2077, 2010 http://dx.doi.org/10.5194/tcd-4-2013-2010 Paper IV Nuth C., Schuler T.V., Kohler J., Altena B. and Hagen J.O. Estimating the long term calving flux of Kronebreen, Svalbard, from geodetic elevation changes and mass balance modelling. Manuscript, published in: Journal of Glaciology, Vol. 58, No. 207, 2012 Copyright IGS. http://dx.doi.org/10.3189/2012JoG11J036 http://dx.doi.org/10.1029/2008JF001223 http://dx.doi.org/10.1016/j.rse.2010.06.008 http://dx.doi.org/10.5194/tcd-4-2013-2010 http://dx.doi.org/10.3189/2012JoG11J036 http://urn.nb.no/URN:NBN:no-28425 Nuth, Christopher. Quantification and interpretation of glacier elevation changes. Doktoravhandling, University of Oslo, 2011 http://hdl.handle.net/10852/12326 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Nuth, Christopher&rft.title=Quantification and interpretation of glacier elevation changes&rft.inst=University of Oslo&rft.date=2011&rft.degree=Doktoravhandling URN:NBN:no-28425 115075 120457318 Fulltext https://www.duo.uio.no/bitstream/handle/10852/12326/3/dravhandling-nuth.pdf |
op_doi |
https://doi.org/10.1029/2008JF001223 https://doi.org/10.1016/j.rse.2010.06.008 https://doi.org/10.5194/tcd-4-2013-2010 https://doi.org/10.3189/2012JoG11J036 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
F1 |
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1766010111905497088 |
spelling |
ftoslouniv:oai:www.duo.uio.no:10852/12326 2023-05-15T16:22:08+02:00 Quantification and interpretation of glacier elevation changes Nuth, Christopher Jack Kohler, Jon Ove Hagen, Thomas Vikhamar Schuler, Andreas Kääb 2011 http://hdl.handle.net/10852/12326 http://urn.nb.no/URN:NBN:no-28425 eng eng Paper I Nuth C., Moholdt G., Kohler J., Hagen J.O., Kääb A (2010) Svalbard glacier elevation changes and contribution to sea level rise. Journal of Geophysical Reasearch- Earth Surface. 115, F01008 http://dx.doi.org/10.1029/2008JF001223 Paper II Moholdt G., Nuth C., Hagen J.O., Kohler J. (2010) Recent elevation changes of Svalbard glaciers derived from ICESat laser altimetry. Remote Sensing of Environment. 114(11), 15 November 2010, Pages 2756-2767. The paper is removed from the thesis in DUO due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1016/j.rse.2010.06.008 Paper III Nuth, C. and Kääb, A. (2010) What is in an elevation difference? Accuracy and corrections of satellite elevation data sets for quantification of glacier changes. Published under a Creative Commons Attribution License. The Cryosphere Discussions. 4, 2013-2077, 2010 http://dx.doi.org/10.5194/tcd-4-2013-2010 Paper IV Nuth C., Schuler T.V., Kohler J., Altena B. and Hagen J.O. Estimating the long term calving flux of Kronebreen, Svalbard, from geodetic elevation changes and mass balance modelling. Manuscript, published in: Journal of Glaciology, Vol. 58, No. 207, 2012 Copyright IGS. http://dx.doi.org/10.3189/2012JoG11J036 http://dx.doi.org/10.1029/2008JF001223 http://dx.doi.org/10.1016/j.rse.2010.06.008 http://dx.doi.org/10.5194/tcd-4-2013-2010 http://dx.doi.org/10.3189/2012JoG11J036 http://urn.nb.no/URN:NBN:no-28425 Nuth, Christopher. Quantification and interpretation of glacier elevation changes. Doktoravhandling, University of Oslo, 2011 http://hdl.handle.net/10852/12326 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Nuth, Christopher&rft.title=Quantification and interpretation of glacier elevation changes&rft.inst=University of Oslo&rft.date=2011&rft.degree=Doktoravhandling URN:NBN:no-28425 115075 120457318 Fulltext https://www.duo.uio.no/bitstream/handle/10852/12326/3/dravhandling-nuth.pdf VDP::450 Doctoral thesis Doktoravhandling 2011 ftoslouniv https://doi.org/10.1029/2008JF001223 https://doi.org/10.1016/j.rse.2010.06.008 https://doi.org/10.5194/tcd-4-2013-2010 https://doi.org/10.3189/2012JoG11J036 2020-06-21T08:42:07Z Glaciers, ice caps and ice sheets constitute a large reservoir in the global hydrological cycle and provide a coupling between climate and sea-level. Observations of glacial change is important for constraining their contribution to sea-level fluctuations and to better understand the interactions between glaciers and climate. This thesis focuses on glacier observations through measurements of elevation change. The research in this thesis is oriented towards the methodological detection of elevation changes using remote sensing techniques. The quality of glacier elevation change measurements is dependent on controlling the potential errors and biases within the data. Therefore, one aspect is focused on a universal co-registration method for elevation products and further identification and correction of biases that remain, specifically in satellite stereo products. For glaciological studies, elevation changes require conversion into volume and mass changes. This is sometimes complicated when the data available is not spatially continuous and/or temporally consistent. Therefore, another aspect of this thesis explores methods for estimating regional glacier volume change. Specifically, Svalbard glacial contribution to sea-level has been estimated using regionalization techniques from scattered elevation measurements over roughly two time epochs. We observed that Svalbard glaciers over the past few decades have had a negative mass balance, contributing approximately 0.026 mm per year to the oceans. During the past few years, the sea-level contribution from Svalbard glaciers decreased slightly to 0.013 mm per year. Interpretations of elevation changes are convoluted by their dependence on climatic and dynamic forces operating on glacier systems. The last aspect of this thesis experiments with surface mass balance modelling for quantifying the climatic component of an elevation change. Combining this with observed elevation changes using theory of mass continuity can yield estimates of the calving flux of icebergs into the ocean. We observed on one particular fast flowing glacier in Svalbard that the average calving flux in the 1966-1990 epoch increased in the 1990-2007 epoch. Doctoral or Postdoctoral Thesis glacier Journal of Glaciology Svalbard The Cryosphere The Cryosphere Discussions Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Svalbard Journal of Geophysical Research 115 F1 |