Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S).
Antisana Glacier 15 basin surface mass balance (SMB) (0.28 km2;0°28'S,78° 09'W, 5750 m), located in the tropical Andes of Ecuador, between 2000 and 2008 has been modeled using two models: an empirical positive degree-day (PDD) and other physical surface energy balance approach.As a first s...
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Other Authors: | , , , , , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | French |
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HAL CCSD
2015
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Online Access: | https://theses.hal.science/tel-01561610 https://theses.hal.science/tel-01561610/document https://theses.hal.science/tel-01561610/file/MAISINCHO_2015_diffusion.pdf |
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ftunivnantes:oai:HAL:tel-01561610v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
Glacier Melt Climat Energy balance Water resource Fonte Bilan d'énergie Ressource en eau [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Glacier Melt Climat Energy balance Water resource Fonte Bilan d'énergie Ressource en eau [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Maisincho Guagrilla, Luis Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). |
topic_facet |
Glacier Melt Climat Energy balance Water resource Fonte Bilan d'énergie Ressource en eau [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
Antisana Glacier 15 basin surface mass balance (SMB) (0.28 km2;0°28'S,78° 09'W, 5750 m), located in the tropical Andes of Ecuador, between 2000 and 2008 has been modeled using two models: an empirical positive degree-day (PDD) and other physical surface energy balance approach.As a first stage, melting was calculated using daily temperature and the cumulative precipitation while sublimation was computed as wind-speed function. The PDD was applied at daily-time step and calibrated at 4900 m a.s.l. The period time to calibrate was March 2002 - August 2003 and validated was January - November 2005. A significant link between melting rates and temperature was revealed when model discriminates snow and ice surface. This relationship is explained by the link between the short-wave radiation and air temperature. However, this relationship disappears under intense wind-speed events, however this events show low air temperature, therefore they are not affect the final results. The PDD model was applied for modeling SMB, ablation, snow-line position and equilibrium line altitude. The results show this model type fits to SMB measures over Antisana glacier. However, it should not apply to other tropical regions, particularly where there are high sublimation rates (pronounced dry seasons) or where glaciers are located under the isotherm 0 ° C.A second stage, a distributed surface energy balance (DBES) model over glacier 15a of the Antisana was applied to quantify ice and snow ablation. For this task was used a model adapted to tropical conditions from Adélie Land-Antarctica BES model. Initially, the model was applied at 4900 m.a.s.l. , with a slope of 28º and NW (45 °) azimuth. For computing DBES, the glacier was divided in 18 altitude strips ( 50m/level). The model generated slops and azimuths from a digital elevation model (DEM). The meteorological vertical gradients were measured in the study zone. This values was used into de model as constants during both periods calibration and validation. The DBES model reproduced the ... |
author2 |
Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) Université Grenoble Alpes Escuela politécnica nacional (Quito) Bernard Francou |
format |
Doctoral or Postdoctoral Thesis |
author |
Maisincho Guagrilla, Luis |
author_facet |
Maisincho Guagrilla, Luis |
author_sort |
Maisincho Guagrilla, Luis |
title |
Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). |
title_short |
Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). |
title_full |
Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). |
title_fullStr |
Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). |
title_full_unstemmed |
Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). |
title_sort |
analysis of the melting from ice and snow in the tropical andes using the energy balance approach : glacier antisana, ecuador (0 ° 28's). |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://theses.hal.science/tel-01561610 https://theses.hal.science/tel-01561610/document https://theses.hal.science/tel-01561610/file/MAISINCHO_2015_diffusion.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
https://theses.hal.science/tel-01561610 Sciences de la Terre. Université Grenoble Alpes; Escuela politécnica nacional (Quito), 2015. Français. ⟨NNT : 2015GREAU027⟩ |
op_relation |
NNT: 2015GREAU027 tel-01561610 https://theses.hal.science/tel-01561610 https://theses.hal.science/tel-01561610/document https://theses.hal.science/tel-01561610/file/MAISINCHO_2015_diffusion.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766139785373548544 |
spelling |
ftunivnantes:oai:HAL:tel-01561610v1 2023-05-15T13:40:46+02:00 Analysis of the melting from ice and snow in the tropical Andes using the energy balance approach : Glacier Antisana, Ecuador (0 ° 28'S). Analyse de la fonte glaciaire et nivale dans les Andes tropicales à partir d’un bilan d’énergie : Glacier de l’Antisana, Equateur (0°28’S) Maisincho Guagrilla, Luis Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS) Université Grenoble Alpes Escuela politécnica nacional (Quito) Bernard Francou 2015-11-09 https://theses.hal.science/tel-01561610 https://theses.hal.science/tel-01561610/document https://theses.hal.science/tel-01561610/file/MAISINCHO_2015_diffusion.pdf fr fre HAL CCSD NNT: 2015GREAU027 tel-01561610 https://theses.hal.science/tel-01561610 https://theses.hal.science/tel-01561610/document https://theses.hal.science/tel-01561610/file/MAISINCHO_2015_diffusion.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-01561610 Sciences de la Terre. Université Grenoble Alpes; Escuela politécnica nacional (Quito), 2015. Français. ⟨NNT : 2015GREAU027⟩ Glacier Melt Climat Energy balance Water resource Fonte Bilan d'énergie Ressource en eau [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/doctoralThesis Theses 2015 ftunivnantes 2023-03-08T06:43:03Z Antisana Glacier 15 basin surface mass balance (SMB) (0.28 km2;0°28'S,78° 09'W, 5750 m), located in the tropical Andes of Ecuador, between 2000 and 2008 has been modeled using two models: an empirical positive degree-day (PDD) and other physical surface energy balance approach.As a first stage, melting was calculated using daily temperature and the cumulative precipitation while sublimation was computed as wind-speed function. The PDD was applied at daily-time step and calibrated at 4900 m a.s.l. The period time to calibrate was March 2002 - August 2003 and validated was January - November 2005. A significant link between melting rates and temperature was revealed when model discriminates snow and ice surface. This relationship is explained by the link between the short-wave radiation and air temperature. However, this relationship disappears under intense wind-speed events, however this events show low air temperature, therefore they are not affect the final results. The PDD model was applied for modeling SMB, ablation, snow-line position and equilibrium line altitude. The results show this model type fits to SMB measures over Antisana glacier. However, it should not apply to other tropical regions, particularly where there are high sublimation rates (pronounced dry seasons) or where glaciers are located under the isotherm 0 ° C.A second stage, a distributed surface energy balance (DBES) model over glacier 15a of the Antisana was applied to quantify ice and snow ablation. For this task was used a model adapted to tropical conditions from Adélie Land-Antarctica BES model. Initially, the model was applied at 4900 m.a.s.l. , with a slope of 28º and NW (45 °) azimuth. For computing DBES, the glacier was divided in 18 altitude strips ( 50m/level). The model generated slops and azimuths from a digital elevation model (DEM). The meteorological vertical gradients were measured in the study zone. This values was used into de model as constants during both periods calibration and validation. The DBES model reproduced the ... Doctoral or Postdoctoral Thesis Antarc* Antarctica Université de Nantes: HAL-UNIV-NANTES |