Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes)
A 36 m long ice core down to bedrock from the Cerro Tapado glacier (5536 m a.s.l, 30°08' S, 69°55' W) was analyzed to reconstruct past climatic conditions for Northern Chile. Because of the marked seasonality in the precipitation (short wet winter and extended dry summer periods) in this r...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2006
|
Subjects: | |
Online Access: | https://boris.unibe.ch/18241/1/cp-2-21-2006.pdf https://boris.unibe.ch/18241/ |
id |
ftunivbern:oai:boris.unibe.ch:18241 |
---|---|
record_format |
openpolar |
spelling |
ftunivbern:oai:boris.unibe.ch:18241 2023-08-20T04:07:11+02:00 Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) Ginot, Patrick Kull, Christoph Schotterer, Ulrich Schwikowski, Margit Gäggeler, Heinz 2006 application/pdf https://boris.unibe.ch/18241/1/cp-2-21-2006.pdf https://boris.unibe.ch/18241/ eng eng Copernicus Publications https://boris.unibe.ch/18241/ info:eu-repo/semantics/openAccess Ginot, Patrick; Kull, Christoph; Schotterer, Ulrich; Schwikowski, Margit; Gäggeler, Heinz (2006). Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes). Climate of the past, 2(1), pp. 21-30. Göttingen: Copernicus Publications 10.5194/cp-2-21-2006 <http://dx.doi.org/10.5194/cp-2-21-2006> info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2006 ftunivbern https://doi.org/10.5194/cp-2-21-2006 2023-07-31T20:42:21Z A 36 m long ice core down to bedrock from the Cerro Tapado glacier (5536 m a.s.l, 30°08' S, 69°55' W) was analyzed to reconstruct past climatic conditions for Northern Chile. Because of the marked seasonality in the precipitation (short wet winter and extended dry summer periods) in this region, major snow ablation and related post-depositional processes occur on the glacier surface during summer periods. They include predominantly sublimation and dry deposition. Assuming that, like measured during the field campaign, the enrichment of chloride was always related to sublimation, the chemical record along the ice core may be applied to reconstruct the history of such secondary processes linked to the past climatic conditions over northern Chile. For the time period 1962–1999, a mean annual net accumulation of 316 mm water equivalent (weq) and 327 mm weq loss by sublimation was deduced by this method. This corresponds to an initial total annual accumulation of 539 mm weq. The annual variability of the accumulation and sublimation is related with the Southern Oscillation Index (SOI): higher net-accumulation during El-Niño years and more sublimation during La Niña years. The deepest part of the ice record shows a time discontinuity; with an ice body deposited under different climatic conditions: 290 mm higher precipitation but with reduced seasonal distribution (+470 mm in winter and –180 mm in summer) and –3°C lower mean annual temperature. Unfortunately, its age is unknown. The comparison with regional proxy data however let us conclude that the glacier buildup did most likely occur after the dry mid-Holocene. Article in Journal/Newspaper ice core BORIS (Bern Open Repository and Information System, University of Bern) Soi ENVELOPE(30.704,30.704,66.481,66.481) Climate of the Past 2 1 21 30 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
description |
A 36 m long ice core down to bedrock from the Cerro Tapado glacier (5536 m a.s.l, 30°08' S, 69°55' W) was analyzed to reconstruct past climatic conditions for Northern Chile. Because of the marked seasonality in the precipitation (short wet winter and extended dry summer periods) in this region, major snow ablation and related post-depositional processes occur on the glacier surface during summer periods. They include predominantly sublimation and dry deposition. Assuming that, like measured during the field campaign, the enrichment of chloride was always related to sublimation, the chemical record along the ice core may be applied to reconstruct the history of such secondary processes linked to the past climatic conditions over northern Chile. For the time period 1962–1999, a mean annual net accumulation of 316 mm water equivalent (weq) and 327 mm weq loss by sublimation was deduced by this method. This corresponds to an initial total annual accumulation of 539 mm weq. The annual variability of the accumulation and sublimation is related with the Southern Oscillation Index (SOI): higher net-accumulation during El-Niño years and more sublimation during La Niña years. The deepest part of the ice record shows a time discontinuity; with an ice body deposited under different climatic conditions: 290 mm higher precipitation but with reduced seasonal distribution (+470 mm in winter and –180 mm in summer) and –3°C lower mean annual temperature. Unfortunately, its age is unknown. The comparison with regional proxy data however let us conclude that the glacier buildup did most likely occur after the dry mid-Holocene. |
format |
Article in Journal/Newspaper |
author |
Ginot, Patrick Kull, Christoph Schotterer, Ulrich Schwikowski, Margit Gäggeler, Heinz |
spellingShingle |
Ginot, Patrick Kull, Christoph Schotterer, Ulrich Schwikowski, Margit Gäggeler, Heinz Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) |
author_facet |
Ginot, Patrick Kull, Christoph Schotterer, Ulrich Schwikowski, Margit Gäggeler, Heinz |
author_sort |
Ginot, Patrick |
title |
Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) |
title_short |
Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) |
title_full |
Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) |
title_fullStr |
Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) |
title_full_unstemmed |
Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes) |
title_sort |
glacier mass balance reconstruction by sublimation induced enrichment of chemical species on cerro tapado (chilean andes) |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://boris.unibe.ch/18241/1/cp-2-21-2006.pdf https://boris.unibe.ch/18241/ |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Soi |
geographic_facet |
Soi |
genre |
ice core |
genre_facet |
ice core |
op_source |
Ginot, Patrick; Kull, Christoph; Schotterer, Ulrich; Schwikowski, Margit; Gäggeler, Heinz (2006). Glacier mass balance reconstruction by sublimation induced enrichment of chemical species on Cerro Tapado (Chilean Andes). Climate of the past, 2(1), pp. 21-30. Göttingen: Copernicus Publications 10.5194/cp-2-21-2006 <http://dx.doi.org/10.5194/cp-2-21-2006> |
op_relation |
https://boris.unibe.ch/18241/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-2-21-2006 |
container_title |
Climate of the Past |
container_volume |
2 |
container_issue |
1 |
container_start_page |
21 |
op_container_end_page |
30 |
_version_ |
1774718664486944768 |