Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps
International audience Temporal trends related to recent climatic fluctuations are extracted from the longest glacier-wide winter and summer mass-balance series recorded in the Alps, at Glacier de Sarennes, France. For this, all point balances measured at the glacier surface are used, and different...
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ftccsdartic:oai:HAL:hal-02594923v1 2023-05-15T16:57:26+02:00 Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps Eckert, Nicolas Baya, H. Thibert, Emmanuel Vincent, C. Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Centre National de la Recherche Scientifique (CNRS) GLACIOCLIM through Observatoire des Sciences de l'Univers de Grenoble (OSUG) Institut des Sciences de l'Univers (INSU) 2011 https://hal.inrae.fr/hal-02594923 https://doi.org/10.3189/002214311795306673 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.3189/002214311795306673 hal-02594923 https://hal.inrae.fr/hal-02594923 doi:10.3189/002214311795306673 IRSTEA: PUB00031631 WOS: 000288526400013 ISSN: 0022-1430 Journal of Glaciology https://hal.inrae.fr/hal-02594923 Journal of Glaciology, International Glaciological Society, 2011, 57 (201), pp.134-150. ⟨10.3189/002214311795306673⟩ GLACIER DE SARENNES [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2011 ftccsdartic https://doi.org/10.3189/002214311795306673 2021-08-07T23:06:01Z International audience Temporal trends related to recent climatic fluctuations are extracted from the longest glacier-wide winter and summer mass-balance series recorded in the Alps, at Glacier de Sarennes, France. For this, all point balances measured at the glacier surface are used, and different statistical models are developed and tested. First, Lliboutry's linear variance analysis model is extended to the two seasonal components of the balance. The explicit modelling of variability sources and correlations is proved useful for appropriately quantifying uncertainties in the different components of the balance and estimating missing data. Next, a non-exchangeable structure is added to model the winter and summer balance time series. Two change points separating different underlying trends are thus detected. The first change was in 1976, with a shift of +23% in the winter balance. The second was in 1982 for the summer balance series. These systematic changes explain 2030% of the variability of the different components of the balance, the rest being made up of random interannual fluctuations. Simplified and/or less physically based models are less efficient in capturing data variability. As a result, the cumulative glacier-wide balance shows systematic parabolic trends, which result in an accelerated mass loss for Glacier de Sarennes over the last 25 years. Article in Journal/Newspaper Journal of Glaciology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Glaciology 57 201 134 150 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
GLACIER DE SARENNES [SDE]Environmental Sciences |
spellingShingle |
GLACIER DE SARENNES [SDE]Environmental Sciences Eckert, Nicolas Baya, H. Thibert, Emmanuel Vincent, C. Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps |
topic_facet |
GLACIER DE SARENNES [SDE]Environmental Sciences |
description |
International audience Temporal trends related to recent climatic fluctuations are extracted from the longest glacier-wide winter and summer mass-balance series recorded in the Alps, at Glacier de Sarennes, France. For this, all point balances measured at the glacier surface are used, and different statistical models are developed and tested. First, Lliboutry's linear variance analysis model is extended to the two seasonal components of the balance. The explicit modelling of variability sources and correlations is proved useful for appropriately quantifying uncertainties in the different components of the balance and estimating missing data. Next, a non-exchangeable structure is added to model the winter and summer balance time series. Two change points separating different underlying trends are thus detected. The first change was in 1976, with a shift of +23% in the winter balance. The second was in 1982 for the summer balance series. These systematic changes explain 2030% of the variability of the different components of the balance, the rest being made up of random interannual fluctuations. Simplified and/or less physically based models are less efficient in capturing data variability. As a result, the cumulative glacier-wide balance shows systematic parabolic trends, which result in an accelerated mass loss for Glacier de Sarennes over the last 25 years. |
author2 |
Érosion torrentielle, neige et avalanches (UR ETGR (ETNA)) Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF) Centre National de la Recherche Scientifique (CNRS) GLACIOCLIM through Observatoire des Sciences de l'Univers de Grenoble (OSUG) Institut des Sciences de l'Univers (INSU) |
format |
Article in Journal/Newspaper |
author |
Eckert, Nicolas Baya, H. Thibert, Emmanuel Vincent, C. |
author_facet |
Eckert, Nicolas Baya, H. Thibert, Emmanuel Vincent, C. |
author_sort |
Eckert, Nicolas |
title |
Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps |
title_short |
Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps |
title_full |
Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps |
title_fullStr |
Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps |
title_full_unstemmed |
Extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at Glacier de Sarennes, French Alps |
title_sort |
extracting the temporal signal from a winter and summer mass-balance series: application to a six-decade record at glacier de sarennes, french alps |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.inrae.fr/hal-02594923 https://doi.org/10.3189/002214311795306673 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
ISSN: 0022-1430 Journal of Glaciology https://hal.inrae.fr/hal-02594923 Journal of Glaciology, International Glaciological Society, 2011, 57 (201), pp.134-150. ⟨10.3189/002214311795306673⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/002214311795306673 hal-02594923 https://hal.inrae.fr/hal-02594923 doi:10.3189/002214311795306673 IRSTEA: PUB00031631 WOS: 000288526400013 |
op_doi |
https://doi.org/10.3189/002214311795306673 |
container_title |
Journal of Glaciology |
container_volume |
57 |
container_issue |
201 |
container_start_page |
134 |
op_container_end_page |
150 |
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1766048973140787200 |