Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S)
International audience The spatial variables which affect the surface thermal regime are explored in a valley in a high-altitude catchment of the Andes of Santiago. Two one-year (2009 - 10 and 2010 - 11) ground surface temperature (GST) time series are analysed separately and linear mixed-effects mo...
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Online Access: | https://hal.science/hal-00870977 https://doi.org/10.1002/ppp.1753 |
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ftunivsavoie:oai:HAL:hal-00870977v1 2024-04-28T08:35:55+00:00 Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) Apaloo, Jotham Brenning, Alexander Bodin, Xavier Department of Geography and Environmental Management Waterloo University of Waterloo Waterloo Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Instituto de Geografia Pontificia Universidad Católica de Chile (UC) 2012 https://hal.science/hal-00870977 https://doi.org/10.1002/ppp.1753 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/ppp.1753 hal-00870977 https://hal.science/hal-00870977 doi:10.1002/ppp.1753 ISSN: 1045-6740 EISSN: 1099-1530 Permafrost and Periglacial Processes https://hal.science/hal-00870977 Permafrost and Periglacial Processes, 2012, 23, pp. 277-291. ⟨10.1002/ppp.1753⟩ round thermal regime snow cover duration mountain permafrost linear mixed-effects model Andes [SHS.ENVIR]Humanities and Social Sciences/Environmental studies [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2012 ftunivsavoie https://doi.org/10.1002/ppp.1753 2024-04-11T00:12:29Z International audience The spatial variables which affect the surface thermal regime are explored in a valley in a high-altitude catchment of the Andes of Santiago. Two one-year (2009 - 10 and 2010 - 11) ground surface temperature (GST) time series are analysed separately and linear mixed-effects models are used to quantify the effects of site characteristics on mean GST (MGST) and ground surface thermal regimes. The effect of snow cover onset and disappearance dates on MGST is further examined in a sensitivity analysis. Elevation has the strongest effect on MGST (1C/100 m), 30 additional days of snow cover suppress MGST by an estimated 0.1 to 0.6 C and openwork boulder surfaces are cooler by an estimated 0.6 to 0.8 C. The sensitivity analysis corroborates the effect of late snow cover in the linear models, which can overwhelm the spatial differences in radiative effects. A positive MGST found on active rock glaciers would suggest negative thermal offsets probably related to the presence of coarse blocky material at the surface, and which may also be present outside rock glaciers. We suggest that spatial patterns of MGST can serve as a proxy for spatial patterns in the lower limit of permafrost occurrence Article in Journal/Newspaper permafrost Permafrost and Periglacial Processes Université Savoie Mont Blanc: HAL Permafrost and Periglacial Processes 23 4 277 291 |
institution |
Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
round thermal regime snow cover duration mountain permafrost linear mixed-effects model Andes [SHS.ENVIR]Humanities and Social Sciences/Environmental studies [SDE]Environmental Sciences |
spellingShingle |
round thermal regime snow cover duration mountain permafrost linear mixed-effects model Andes [SHS.ENVIR]Humanities and Social Sciences/Environmental studies [SDE]Environmental Sciences Apaloo, Jotham Brenning, Alexander Bodin, Xavier Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) |
topic_facet |
round thermal regime snow cover duration mountain permafrost linear mixed-effects model Andes [SHS.ENVIR]Humanities and Social Sciences/Environmental studies [SDE]Environmental Sciences |
description |
International audience The spatial variables which affect the surface thermal regime are explored in a valley in a high-altitude catchment of the Andes of Santiago. Two one-year (2009 - 10 and 2010 - 11) ground surface temperature (GST) time series are analysed separately and linear mixed-effects models are used to quantify the effects of site characteristics on mean GST (MGST) and ground surface thermal regimes. The effect of snow cover onset and disappearance dates on MGST is further examined in a sensitivity analysis. Elevation has the strongest effect on MGST (1C/100 m), 30 additional days of snow cover suppress MGST by an estimated 0.1 to 0.6 C and openwork boulder surfaces are cooler by an estimated 0.6 to 0.8 C. The sensitivity analysis corroborates the effect of late snow cover in the linear models, which can overwhelm the spatial differences in radiative effects. A positive MGST found on active rock glaciers would suggest negative thermal offsets probably related to the presence of coarse blocky material at the surface, and which may also be present outside rock glaciers. We suggest that spatial patterns of MGST can serve as a proxy for spatial patterns in the lower limit of permafrost occurrence |
author2 |
Department of Geography and Environmental Management Waterloo University of Waterloo Waterloo Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Instituto de Geografia Pontificia Universidad Católica de Chile (UC) |
format |
Article in Journal/Newspaper |
author |
Apaloo, Jotham Brenning, Alexander Bodin, Xavier |
author_facet |
Apaloo, Jotham Brenning, Alexander Bodin, Xavier |
author_sort |
Apaloo, Jotham |
title |
Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) |
title_short |
Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) |
title_full |
Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) |
title_fullStr |
Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) |
title_full_unstemmed |
Interactions between Seasonal Snow Cover, Ground Surface Temperature and Topography (Andes of Santiago, Chile, 33.5 S) |
title_sort |
interactions between seasonal snow cover, ground surface temperature and topography (andes of santiago, chile, 33.5 s) |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00870977 https://doi.org/10.1002/ppp.1753 |
genre |
permafrost Permafrost and Periglacial Processes |
genre_facet |
permafrost Permafrost and Periglacial Processes |
op_source |
ISSN: 1045-6740 EISSN: 1099-1530 Permafrost and Periglacial Processes https://hal.science/hal-00870977 Permafrost and Periglacial Processes, 2012, 23, pp. 277-291. ⟨10.1002/ppp.1753⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/ppp.1753 hal-00870977 https://hal.science/hal-00870977 doi:10.1002/ppp.1753 |
op_doi |
https://doi.org/10.1002/ppp.1753 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
23 |
container_issue |
4 |
container_start_page |
277 |
op_container_end_page |
291 |
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1797567859333791744 |