The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study
Rabots Glaciar and Storglaciaren, two small valley glaciers in the Swedish Arctic, have not behaved synchronously in response to recent climate change. Both glaciers advanced late in the 19th century and then began to retreat in response to an approximately 1 degree C warming that occurred around 19...
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ftunivminnesmor:oai:digitalcommons.morris.umn.edu:geol_facpubs-1003 2023-05-15T15:07:24+02:00 The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study Brugger, Keith A. 2007-01-01T08:00:00Z application/pdf https://digitalcommons.morris.umn.edu/geol_facpubs/2 https://digitalcommons.morris.umn.edu/cgi/viewcontent.cgi?article=1003&context=geol_facpubs unknown University of Minnesota Morris Digital Well https://digitalcommons.morris.umn.edu/geol_facpubs/2 https://digitalcommons.morris.umn.edu/cgi/viewcontent.cgi?article=1003&context=geol_facpubs Geology Publications Geology Glaciology text 2007 ftunivminnesmor 2023-03-12T18:53:48Z Rabots Glaciar and Storglaciaren, two small valley glaciers in the Swedish Arctic, have not behaved synchronously in response to recent climate change. Both glaciers advanced late in the 19th century and then began to retreat in response to an approximately 1 degree C warming that occurred around 1910. By the mid-1980s the terminus and volume of Storglaciaren had essentially stabilized, so it may have completed its response to the earlier warming. In contrast, ongoing thinning and retreat of Rabots Glaciar are substantial and suggest its response time is considerably longer. A time-dependent numerical model was used to investigate each glacier’s response to perturbations in mass balance. This modeling suggests that, for small perturbations, volume timescales for Storglaciaren and Rabots Glaciar are approximately 125 and 215 years, respectively. Another measure of response time (i.e. length response time) yields somewhat lower values for each glacier; however, what is significant is that by either measure and accounting for uncertainties, the response time for Rabots Glaciar is consistently about 1.5 times longer than that for Storglaciaren. This implies that their non-synchronous behavior is likely due to differences in response times. The latter ultimately result from markedly different longitudinal geometries (particularly near the termini), velocity profiles and specific net balance gradients. Text Arctic Climate change Northern Sweden University of Minnesota, Morris (UMM): Digital Well Arctic |
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University of Minnesota, Morris (UMM): Digital Well |
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ftunivminnesmor |
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topic |
Geology Glaciology |
spellingShingle |
Geology Glaciology Brugger, Keith A. The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study |
topic_facet |
Geology Glaciology |
description |
Rabots Glaciar and Storglaciaren, two small valley glaciers in the Swedish Arctic, have not behaved synchronously in response to recent climate change. Both glaciers advanced late in the 19th century and then began to retreat in response to an approximately 1 degree C warming that occurred around 1910. By the mid-1980s the terminus and volume of Storglaciaren had essentially stabilized, so it may have completed its response to the earlier warming. In contrast, ongoing thinning and retreat of Rabots Glaciar are substantial and suggest its response time is considerably longer. A time-dependent numerical model was used to investigate each glacier’s response to perturbations in mass balance. This modeling suggests that, for small perturbations, volume timescales for Storglaciaren and Rabots Glaciar are approximately 125 and 215 years, respectively. Another measure of response time (i.e. length response time) yields somewhat lower values for each glacier; however, what is significant is that by either measure and accounting for uncertainties, the response time for Rabots Glaciar is consistently about 1.5 times longer than that for Storglaciaren. This implies that their non-synchronous behavior is likely due to differences in response times. The latter ultimately result from markedly different longitudinal geometries (particularly near the termini), velocity profiles and specific net balance gradients. |
format |
Text |
author |
Brugger, Keith A. |
author_facet |
Brugger, Keith A. |
author_sort |
Brugger, Keith A. |
title |
The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study |
title_short |
The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study |
title_full |
The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study |
title_fullStr |
The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study |
title_full_unstemmed |
The Non-Synchronous Response to Rabots Glaciar and Storglaciaren, Northern Sweden, to Recent Climate Change: a Comparative Study |
title_sort |
non-synchronous response to rabots glaciar and storglaciaren, northern sweden, to recent climate change: a comparative study |
publisher |
University of Minnesota Morris Digital Well |
publishDate |
2007 |
url |
https://digitalcommons.morris.umn.edu/geol_facpubs/2 https://digitalcommons.morris.umn.edu/cgi/viewcontent.cgi?article=1003&context=geol_facpubs |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Northern Sweden |
genre_facet |
Arctic Climate change Northern Sweden |
op_source |
Geology Publications |
op_relation |
https://digitalcommons.morris.umn.edu/geol_facpubs/2 https://digitalcommons.morris.umn.edu/cgi/viewcontent.cgi?article=1003&context=geol_facpubs |
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1766338918923370496 |