Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources
International audience Besides the Lewis glacier in Kenya, Glacier 15 of Antisana, Ecuador (5760–4830 m, 0.28 km2) is the only one which provides regular information regarding glacier mass balance near to the Equator (Annual Report of the World Services for the Monitoring of Glaciers, WGMS 2005) to...
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ftinsu:oai:HAL:insu-00381196v1 2023-06-18T03:41:39+02:00 Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources Caceres, Bolivar Francou, Bernard Favier, Vincent Bontron, Guillaume Tachker, Pierre Bucher, Rodolphe Taupin, Jean-Denis Vuille, Mathias Maisincho, Luis Delachaux, Fanny Chazarin, Jean-Philippe Cadier, Eric Villacis, Marcos Instituto Nacional de Meteorología e Hydrología (INAMHI) Secretaria Nacional del Agua (SENAGUA) Unité de Recherche Great Ice Climate System Research Center University of Massachusetts System (UMASS) GREAT ICE Siegfried Demuth Alan Gustard Eduardo Planos Fred Scatena & Eric Servat 2006 https://hal-insu.archives-ouvertes.fr/insu-00381196 en eng HAL CCSD IAHS ISBN: 978-1-90150278-7 insu-00381196 https://hal-insu.archives-ouvertes.fr/insu-00381196 Climate Variability and Change - Hydrological Impacts https://hal-insu.archives-ouvertes.fr/insu-00381196 Siegfried Demuth, Alan Gustard, Eduardo Planos, Fred Scatena & Eric Servat. Climate Variability and Change - Hydrological Impacts, 308, IAHS, pp.479-482, 2006, IAHS Publication, 978-1-90150278-7 http://iahs.info/Publications-News.do?dmsSearch_pubno=308 glacier balance abalation ENSO climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/bookPart Book sections 2006 ftinsu 2023-06-05T19:57:01Z International audience Besides the Lewis glacier in Kenya, Glacier 15 of Antisana, Ecuador (5760–4830 m, 0.28 km2) is the only one which provides regular information regarding glacier mass balance near to the Equator (Annual Report of the World Services for the Monitoring of Glaciers, WGMS 2005) to the scientific community. The surface of the glacier had been re-constructed using aerial-photogrammetry from 1956 to 1997. Since 1994, direct measurements have been taken over the terminal zone at the glacier tongue using topography. That process has shown the changes at the glacier limits and has determined the superficial speed at the terminal zone of the tongue (ablation zone). At the ablation zone (<5100 m) a wide net of stakes have been installed in order to measure the evolution of the glacier mass each month since 1995. In addition, holes to measure accumulation have been dug in the ablation zone at the end of the hydrological year (December–January) in order to calculate the net specific annual balance. Glacier 15 has lost an average of 600 mm of water a year since 1995 (11 years). The inter-annual variation is wide: very negative balances were observed in 1995 and 2002, two positive balances in 1999 and 2000, and negative balances for the remaining years. The dynamics of the glacier show a mass balance with very noticeable fluctuations. These variations are well synchronized with the glacier evolution. The variability of the ENSO (El Niño Southern Oscillation) has been an important factor in controlling the mass evolution of the Ecuadorian glaciers and the climate conditions. Those factors caused advances and retreats on the glaciers according to La Niña (cold event) or El Niño (warm event), respectively. This study has shown the relationship between glaciology and availability of hydrological sources. Book Part Lewis Glacier Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
glacier balance abalation ENSO climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
glacier balance abalation ENSO climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Caceres, Bolivar Francou, Bernard Favier, Vincent Bontron, Guillaume Tachker, Pierre Bucher, Rodolphe Taupin, Jean-Denis Vuille, Mathias Maisincho, Luis Delachaux, Fanny Chazarin, Jean-Philippe Cadier, Eric Villacis, Marcos Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources |
topic_facet |
glacier balance abalation ENSO climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Besides the Lewis glacier in Kenya, Glacier 15 of Antisana, Ecuador (5760–4830 m, 0.28 km2) is the only one which provides regular information regarding glacier mass balance near to the Equator (Annual Report of the World Services for the Monitoring of Glaciers, WGMS 2005) to the scientific community. The surface of the glacier had been re-constructed using aerial-photogrammetry from 1956 to 1997. Since 1994, direct measurements have been taken over the terminal zone at the glacier tongue using topography. That process has shown the changes at the glacier limits and has determined the superficial speed at the terminal zone of the tongue (ablation zone). At the ablation zone (<5100 m) a wide net of stakes have been installed in order to measure the evolution of the glacier mass each month since 1995. In addition, holes to measure accumulation have been dug in the ablation zone at the end of the hydrological year (December–January) in order to calculate the net specific annual balance. Glacier 15 has lost an average of 600 mm of water a year since 1995 (11 years). The inter-annual variation is wide: very negative balances were observed in 1995 and 2002, two positive balances in 1999 and 2000, and negative balances for the remaining years. The dynamics of the glacier show a mass balance with very noticeable fluctuations. These variations are well synchronized with the glacier evolution. The variability of the ENSO (El Niño Southern Oscillation) has been an important factor in controlling the mass evolution of the Ecuadorian glaciers and the climate conditions. Those factors caused advances and retreats on the glaciers according to La Niña (cold event) or El Niño (warm event), respectively. This study has shown the relationship between glaciology and availability of hydrological sources. |
author2 |
Instituto Nacional de Meteorología e Hydrología (INAMHI) Secretaria Nacional del Agua (SENAGUA) Unité de Recherche Great Ice Climate System Research Center University of Massachusetts System (UMASS) GREAT ICE Siegfried Demuth Alan Gustard Eduardo Planos Fred Scatena & Eric Servat |
format |
Book Part |
author |
Caceres, Bolivar Francou, Bernard Favier, Vincent Bontron, Guillaume Tachker, Pierre Bucher, Rodolphe Taupin, Jean-Denis Vuille, Mathias Maisincho, Luis Delachaux, Fanny Chazarin, Jean-Philippe Cadier, Eric Villacis, Marcos |
author_facet |
Caceres, Bolivar Francou, Bernard Favier, Vincent Bontron, Guillaume Tachker, Pierre Bucher, Rodolphe Taupin, Jean-Denis Vuille, Mathias Maisincho, Luis Delachaux, Fanny Chazarin, Jean-Philippe Cadier, Eric Villacis, Marcos |
author_sort |
Caceres, Bolivar |
title |
Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources |
title_short |
Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources |
title_full |
Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources |
title_fullStr |
Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources |
title_full_unstemmed |
Glacier 15, Antisana, Ecuador: its glaciology and relations to water resources |
title_sort |
glacier 15, antisana, ecuador: its glaciology and relations to water resources |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00381196 |
genre |
Lewis Glacier |
genre_facet |
Lewis Glacier |
op_source |
Climate Variability and Change - Hydrological Impacts https://hal-insu.archives-ouvertes.fr/insu-00381196 Siegfried Demuth, Alan Gustard, Eduardo Planos, Fred Scatena & Eric Servat. Climate Variability and Change - Hydrological Impacts, 308, IAHS, pp.479-482, 2006, IAHS Publication, 978-1-90150278-7 http://iahs.info/Publications-News.do?dmsSearch_pubno=308 |
op_relation |
ISBN: 978-1-90150278-7 insu-00381196 https://hal-insu.archives-ouvertes.fr/insu-00381196 |
_version_ |
1769007294084808704 |