Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Reanalysing glacier mass balance measurement series
Show others and affiliations
2013 (English)In: The Cryosphere, ISSN 1994-0416, E-ISSN 1994-0424, Vol. 7, no 4, p. 1227-1245Article in journal (Refereed) Published
Abstract [en]

Glacier-wide mass balance has been measured for more than sixty years and is widely used as an indicator of climate change and to assess the glacier contribution to runoff and sea level rise. Until recently, comprehensive uncertainty assessments have rarely been carried out and mass balance data have often been applied using rough error estimation or without consideration of errors. In this study, we propose a framework for reanalysing glacier mass balance series that includes conceptual and statistical toolsets for assessment of random and systematic errors, as well as for validation and calibration (if necessary) of the glaciological with the geodetic balance results. We demonstrate the usefulness and limitations of the proposed scheme, drawing on an analysis that comprises over 50 recording periods for a dozen glaciers, and we make recommendations to investigators and users of glacier mass balance data. Reanalysing glacier mass balance series needs to become a standard procedure for every monitoring programme to improve data quality, including reliable uncertainty estimates.

Place, publisher, year, edition, pages
2013. Vol. 7, no 4, p. 1227-1245
National Category
Geosciences, Multidisciplinary Physical Geography
Research subject
Physical Geography
Identifiers
URN: urn:nbn:se:su:diva-94196DOI: 10.5194/tc-7-1227-2013ISI: 000323985700015OAI: oai:DiVA.org:su-94196DiVA, id: diva2:652416
Note

AuthorCount:17

Available from: 2013-09-30 Created: 2013-09-30 Last updated: 2020-01-23Bibliographically approved
In thesis
1. Studies in Glacier Mass Balance: Measurement and its errors
Open this publication in new window or tab >>Studies in Glacier Mass Balance: Measurement and its errors
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The study of the surface mass balance of valley glaciers has a long history but one that is dogged by uncertainty and errors, and uncertainty about those errors. These problems are acknowledged by the glaciological community and have been examined and formalised in several publications. The latest of these stems from a workshop organised by the World Glacier Monitoring Service, the results of which are presented in the first paper of this thesis. The paper examines two common methods and some of their associated errors, with the aim of unifying them and providing more robust data sets. New methodologies, such as ground penetrating radar (GPR), are used in the second paper herein to provide richer and alternative data sources for approaching measurement problems related to snow depth and, to some degree, snow density. The third paper is concerned with both technical survey issues and glaciological definitions when surveys of glacier surfaces are performed for use in mass balance calculation. Many of these issues are common to remote sensing methods and ground based surveys but the paper attempts to make this commonality more explicit. Whilst the first three papers concern themselves with the act of measurement and calculation the fourth paper considers errors brought about by logistical constraints restricting the timing of surveys. Such errors are technically avoidable to a large degree but inevitable in practice. In the case presented here the error is one of unobserved accumulation, falling late in the season, after the last survey. By modelling expected ablation from minimal data, such as temperature, and comparing this with measured mass balance an estimate of unobserved accumulation is made.

Also contained in this work is an assessment of glacier front surveys, specifically those performed by the Tarfala Research Station. Such surveys are assumed to act as a monitor of glacier response to climate change and are assumed to be a large scale proxy of mass balance but the resolution of the response as well as the resolution of survey methods indicates that the frequency of such surveys should be reduced and that remote sensing methods may be more effective.

Common to all glaciological field surveys is the relative sparsity of data rendering error analysis and many statistical methods ineffective but new technologies such as Lidar, Global Navigation Satellite System, GPR and remote sensing indicate a way forward and the potential for future work to deliver detailed and reliable data.

Place, publisher, year, edition, pages
Stockholm: Department of Physical Geography, Stockholm University, 2018
Series
Dissertations from the Department of Physical Geography, ISSN 1653-7211 ; 72
Keywords
Glaciology, Mass Balance, Measurement Errors
National Category
Physical Geography
Research subject
Physical Geography
Identifiers
urn:nbn:se:su:diva-155233 (URN)978-91-7797-205-1 (ISBN)978-91-7797-206-8 (ISBN)
Public defence
2018-06-11, Ahlmannsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Manuscript.

Available from: 2018-05-17 Created: 2018-04-16 Last updated: 2019-11-29Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Search in DiVA

By author/editor
Mercer, AndrewJansson, Peter
By organisation
Department of Physical Geography and Quaternary Geology
In the same journal
The Cryosphere
Geosciences, MultidisciplinaryPhysical Geography

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 57 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf