Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments
International audience Clouds are an important component of the climate system, yet our understanding of how they directly and indirectly affect glacier melt in different climates is incomplete. Here we analyse high-quality datasets from 16 mountain glaciers in diverse climates around the globe to b...
Published in: | The Cryosphere |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267/document https://hal-insu.archives-ouvertes.fr/insu-03859267/file/tc-16-3331-2022.pdf https://doi.org/10.5194/tc-16-3331-2022 |
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ftunivnantes:oai:HAL:insu-03859267v1 2023-05-15T18:32:20+02:00 Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments Conway, Jonathan P. Abermann, Jakob Andreassen, Liss M. Farooq Azam, Mohd Cullen, Nicolas J. Fitzpatrick, Noel Giesen, Rianne H. Langley, Kirsty Macdonell, Shelley Mölg, Thomas Radić, Valentina Reijmer, Carleen H. Sicart, Jean-Emmanuel Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2022 https://hal-insu.archives-ouvertes.fr/insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267/document https://hal-insu.archives-ouvertes.fr/insu-03859267/file/tc-16-3331-2022.pdf https://doi.org/10.5194/tc-16-3331-2022 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-3331-2022 insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267/document https://hal-insu.archives-ouvertes.fr/insu-03859267/file/tc-16-3331-2022.pdf BIBCODE: 2022TCry.16.3331C doi:10.5194/tc-16-3331-2022 IRD: fdi:010086008 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal-insu.archives-ouvertes.fr/insu-03859267 The Cryosphere, 2022, 16, pp.3331-3356. ⟨10.5194/tc-16-3331-2022⟩ [SDU]Sciences of the Universe [physics] [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.5194/tc-16-3331-2022 2023-03-01T01:18:21Z International audience Clouds are an important component of the climate system, yet our understanding of how they directly and indirectly affect glacier melt in different climates is incomplete. Here we analyse high-quality datasets from 16 mountain glaciers in diverse climates around the globe to better understand how relationships between clouds and near-surface meteorology, radiation and surface energy balance vary. The seasonal cycle of cloud frequency varies markedly between mountain glacier sites. During the main melt season at each site, an increase in cloud cover is associated with increased vapour pressure and relative humidity, but relationships to wind speed are site specific. At colder sites (average near-surface air temperature in the melt season <0 ∘ C), air temperature generally increases with increasing cloudiness, while for warmer sites (average near-surface air temperature in the melt season ≫0 ∘ C), air temperature decreases with increasing cloudiness. At all sites, surface melt is more frequent in cloudy compared to clear-sky conditions. The proportion of melt from temperature-dependent energy fluxes (incoming longwave radiation, turbulent sensible heat and latent heat) also universally increases in cloudy conditions. However, cloud cover does not affect daily total melt in a universal way, with some sites showing increased melt energy during cloudy conditions and others decreased melt energy. The complex association of clouds with melt energy is not amenable to simple relationships due to many interacting physical processes (direct radiative forcing; surface albedo; and co-variance with temperature, humidity and wind) but is most closely related to the effect of clouds on net radiation. These results motivate the use of physics-based surface energy balance models for representing glacier-climate relationships in regional- and global-scale assessments of glacier response to climate change. Article in Journal/Newspaper The Cryosphere Université de Nantes: HAL-UNIV-NANTES The Cryosphere 16 8 3331 3356 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Conway, Jonathan P. Abermann, Jakob Andreassen, Liss M. Farooq Azam, Mohd Cullen, Nicolas J. Fitzpatrick, Noel Giesen, Rianne H. Langley, Kirsty Macdonell, Shelley Mölg, Thomas Radić, Valentina Reijmer, Carleen H. Sicart, Jean-Emmanuel Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Clouds are an important component of the climate system, yet our understanding of how they directly and indirectly affect glacier melt in different climates is incomplete. Here we analyse high-quality datasets from 16 mountain glaciers in diverse climates around the globe to better understand how relationships between clouds and near-surface meteorology, radiation and surface energy balance vary. The seasonal cycle of cloud frequency varies markedly between mountain glacier sites. During the main melt season at each site, an increase in cloud cover is associated with increased vapour pressure and relative humidity, but relationships to wind speed are site specific. At colder sites (average near-surface air temperature in the melt season <0 ∘ C), air temperature generally increases with increasing cloudiness, while for warmer sites (average near-surface air temperature in the melt season ≫0 ∘ C), air temperature decreases with increasing cloudiness. At all sites, surface melt is more frequent in cloudy compared to clear-sky conditions. The proportion of melt from temperature-dependent energy fluxes (incoming longwave radiation, turbulent sensible heat and latent heat) also universally increases in cloudy conditions. However, cloud cover does not affect daily total melt in a universal way, with some sites showing increased melt energy during cloudy conditions and others decreased melt energy. The complex association of clouds with melt energy is not amenable to simple relationships due to many interacting physical processes (direct radiative forcing; surface albedo; and co-variance with temperature, humidity and wind) but is most closely related to the effect of clouds on net radiation. These results motivate the use of physics-based surface energy balance models for representing glacier-climate relationships in regional- and global-scale assessments of glacier response to climate change. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Conway, Jonathan P. Abermann, Jakob Andreassen, Liss M. Farooq Azam, Mohd Cullen, Nicolas J. Fitzpatrick, Noel Giesen, Rianne H. Langley, Kirsty Macdonell, Shelley Mölg, Thomas Radić, Valentina Reijmer, Carleen H. Sicart, Jean-Emmanuel |
author_facet |
Conway, Jonathan P. Abermann, Jakob Andreassen, Liss M. Farooq Azam, Mohd Cullen, Nicolas J. Fitzpatrick, Noel Giesen, Rianne H. Langley, Kirsty Macdonell, Shelley Mölg, Thomas Radić, Valentina Reijmer, Carleen H. Sicart, Jean-Emmanuel |
author_sort |
Conway, Jonathan P. |
title |
Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
title_short |
Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
title_full |
Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
title_fullStr |
Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
title_full_unstemmed |
Cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
title_sort |
cloud forcing of surface energy balance from in situ measurements in diverse mountain glacier environments |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267/document https://hal-insu.archives-ouvertes.fr/insu-03859267/file/tc-16-3331-2022.pdf https://doi.org/10.5194/tc-16-3331-2022 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal-insu.archives-ouvertes.fr/insu-03859267 The Cryosphere, 2022, 16, pp.3331-3356. ⟨10.5194/tc-16-3331-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-3331-2022 insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267 https://hal-insu.archives-ouvertes.fr/insu-03859267/document https://hal-insu.archives-ouvertes.fr/insu-03859267/file/tc-16-3331-2022.pdf BIBCODE: 2022TCry.16.3331C doi:10.5194/tc-16-3331-2022 IRD: fdi:010086008 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-16-3331-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
8 |
container_start_page |
3331 |
op_container_end_page |
3356 |
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