Forecasting temperate alpine glacier survival from accumulation zone observations
Temperate alpine glacier survival is dependent on the consistent presence of an accumulation zone. Frequent low accumulation area ratio values, below 30%, indicate the lack of a consistent accumulation zone, which leads to substantial thinning of the glacier in the accumulation zone. This thinning i...
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ftdoajarticles:oai:doaj.org/article:650638a5a6784e958fb35359d9480302 2023-05-15T18:32:24+02:00 Forecasting temperate alpine glacier survival from accumulation zone observations M. S. Pelto 2010-01-01T00:00:00Z https://doaj.org/article/650638a5a6784e958fb35359d9480302 EN eng Copernicus Publications http://www.the-cryosphere.net/4/67/2010/tc-4-67-2010.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 https://doaj.org/article/650638a5a6784e958fb35359d9480302 The Cryosphere, Vol 4, Iss 1, Pp 67-75 (2010) Environmental sciences GE1-350 Geology QE1-996.5 article 2010 ftdoajarticles 2022-12-31T00:54:20Z Temperate alpine glacier survival is dependent on the consistent presence of an accumulation zone. Frequent low accumulation area ratio values, below 30%, indicate the lack of a consistent accumulation zone, which leads to substantial thinning of the glacier in the accumulation zone. This thinning is often evident from substantial marginal recession, emergence of new rock outcrops and surface elevation decline in the accumulation zone. In the North Cascades 9 of the 12 examined glaciers exhibit characteristics of substantial accumulation zone thinning; marginal recession or emergent bedrock areas in the accumulation zone. The longitudinal profile thinning factor, f , which is a measure of the ratio of thinning in the accumulation zone to that at the terminus, is above 0.6 for all glaciers exhibiting accumulation zone thinning characteristics. The ratio of accumulation zone thinning to cumulative mass balance is above 0.5 for glacier experiencing substantial accumulation zone thinning. Without a consistent accumulation zone these glaciers are forecast not to survive the current climate or future additional warming. The results vary considerably with adjacent glaciers having a different survival forecast. This emphasizes the danger of extrapolating survival from one glacier to the next. Article in Journal/Newspaper The Cryosphere New Rock Directory of Open Access Journals: DOAJ Articles New Rock ENVELOPE(-60.734,-60.734,-63.007,-63.007) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 M. S. Pelto Forecasting temperate alpine glacier survival from accumulation zone observations |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Temperate alpine glacier survival is dependent on the consistent presence of an accumulation zone. Frequent low accumulation area ratio values, below 30%, indicate the lack of a consistent accumulation zone, which leads to substantial thinning of the glacier in the accumulation zone. This thinning is often evident from substantial marginal recession, emergence of new rock outcrops and surface elevation decline in the accumulation zone. In the North Cascades 9 of the 12 examined glaciers exhibit characteristics of substantial accumulation zone thinning; marginal recession or emergent bedrock areas in the accumulation zone. The longitudinal profile thinning factor, f , which is a measure of the ratio of thinning in the accumulation zone to that at the terminus, is above 0.6 for all glaciers exhibiting accumulation zone thinning characteristics. The ratio of accumulation zone thinning to cumulative mass balance is above 0.5 for glacier experiencing substantial accumulation zone thinning. Without a consistent accumulation zone these glaciers are forecast not to survive the current climate or future additional warming. The results vary considerably with adjacent glaciers having a different survival forecast. This emphasizes the danger of extrapolating survival from one glacier to the next. |
format |
Article in Journal/Newspaper |
author |
M. S. Pelto |
author_facet |
M. S. Pelto |
author_sort |
M. S. Pelto |
title |
Forecasting temperate alpine glacier survival from accumulation zone observations |
title_short |
Forecasting temperate alpine glacier survival from accumulation zone observations |
title_full |
Forecasting temperate alpine glacier survival from accumulation zone observations |
title_fullStr |
Forecasting temperate alpine glacier survival from accumulation zone observations |
title_full_unstemmed |
Forecasting temperate alpine glacier survival from accumulation zone observations |
title_sort |
forecasting temperate alpine glacier survival from accumulation zone observations |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doaj.org/article/650638a5a6784e958fb35359d9480302 |
long_lat |
ENVELOPE(-60.734,-60.734,-63.007,-63.007) |
geographic |
New Rock |
geographic_facet |
New Rock |
genre |
The Cryosphere New Rock |
genre_facet |
The Cryosphere New Rock |
op_source |
The Cryosphere, Vol 4, Iss 1, Pp 67-75 (2010) |
op_relation |
http://www.the-cryosphere.net/4/67/2010/tc-4-67-2010.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 https://doaj.org/article/650638a5a6784e958fb35359d9480302 |
_version_ |
1766216513873772544 |