Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model
To study the past and future evolution of Rhonegletscher, Switzerland, a flowline model was developed to include valley shape effects more accurately than conventional flowband models. In the model, the ice flux at a gridpoint was computed by a two-dimensional ice-flow model applied to the valley cr...
Published in: | Annals of Glaciology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
International Glaciological Society
|
Subjects: | |
Online Access: | http://hdl.handle.net/2115/34781 https://doi.org/10.3189/172756407782871143 |
id |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/34781 |
---|---|
record_format |
openpolar |
spelling |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/34781 2023-05-15T13:29:11+02:00 Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model Sugiyama, Shin Bauder, Andreas Zahno, Conradin Funk, Martin http://hdl.handle.net/2115/34781 https://doi.org/10.3189/172756407782871143 eng eng International Glaciological Society http://www.igsoc.org/ http://hdl.handle.net/2115/34781 Annals of Glaciology, 46: 268-274 http://dx.doi.org/10.3189/172756407782871143 © 2007 International Glaciological Society 452 article fthokunivhus https://doi.org/10.3189/172756407782871143 2022-11-18T01:01:39Z To study the past and future evolution of Rhonegletscher, Switzerland, a flowline model was developed to include valley shape effects more accurately than conventional flowband models. In the model, the ice flux at a gridpoint was computed by a two-dimensional ice-flow model applied to the valley cross-section. The results suggested the underestimation of the accumulation area, which seems to be a general problem of flowline modelling arising from the model's one-dimensional nature. The corrected mass balance was coupled with the equilibrium-line altitude (ELA) change, which was reconstructed for the period 1878–2003 from temperature and precipitation records, to run the model for the past 125 years. The model satisfactorily reproduced both changes in the terminus position and the total ice volume derived from digital elevation models of the surface obtained by analyses of old maps and aerial photographs. This showed the model’s potential to simulate glacier evolution when an accurate mass balance could be determined. The future evolution of Rhonegletscher was evaluated with three mass-balance conditions: the mean for the period 1994–2003, and the most negative (2003) and positive (1978) mass-balance values for the past 50 years. The model predicted volume changes of –18%, –58% and +38% after 50 years for the three conditions, respectively. Article in Journal/Newspaper Annals of Glaciology Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Ela ENVELOPE(9.642,9.642,63.170,63.170) Annals of Glaciology 46 268 274 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Sugiyama, Shin Bauder, Andreas Zahno, Conradin Funk, Martin Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model |
topic_facet |
452 |
description |
To study the past and future evolution of Rhonegletscher, Switzerland, a flowline model was developed to include valley shape effects more accurately than conventional flowband models. In the model, the ice flux at a gridpoint was computed by a two-dimensional ice-flow model applied to the valley cross-section. The results suggested the underestimation of the accumulation area, which seems to be a general problem of flowline modelling arising from the model's one-dimensional nature. The corrected mass balance was coupled with the equilibrium-line altitude (ELA) change, which was reconstructed for the period 1878–2003 from temperature and precipitation records, to run the model for the past 125 years. The model satisfactorily reproduced both changes in the terminus position and the total ice volume derived from digital elevation models of the surface obtained by analyses of old maps and aerial photographs. This showed the model’s potential to simulate glacier evolution when an accurate mass balance could be determined. The future evolution of Rhonegletscher was evaluated with three mass-balance conditions: the mean for the period 1994–2003, and the most negative (2003) and positive (1978) mass-balance values for the past 50 years. The model predicted volume changes of –18%, –58% and +38% after 50 years for the three conditions, respectively. |
format |
Article in Journal/Newspaper |
author |
Sugiyama, Shin Bauder, Andreas Zahno, Conradin Funk, Martin |
author_facet |
Sugiyama, Shin Bauder, Andreas Zahno, Conradin Funk, Martin |
author_sort |
Sugiyama, Shin |
title |
Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model |
title_short |
Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model |
title_full |
Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model |
title_fullStr |
Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model |
title_full_unstemmed |
Evolution of Rhonegletscher, Switzerland, over the past 125 years and in the future : application of an improved flowline model |
title_sort |
evolution of rhonegletscher, switzerland, over the past 125 years and in the future : application of an improved flowline model |
publisher |
International Glaciological Society |
url |
http://hdl.handle.net/2115/34781 https://doi.org/10.3189/172756407782871143 |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) |
geographic |
Ela |
geographic_facet |
Ela |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_relation |
http://www.igsoc.org/ http://hdl.handle.net/2115/34781 Annals of Glaciology, 46: 268-274 http://dx.doi.org/10.3189/172756407782871143 |
op_rights |
© 2007 International Glaciological Society |
op_doi |
https://doi.org/10.3189/172756407782871143 |
container_title |
Annals of Glaciology |
container_volume |
46 |
container_start_page |
268 |
op_container_end_page |
274 |
_version_ |
1765999131145273344 |