Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere
International audience The Arctic atmosphere–surface system transmits visible light from the Sun to the ocean, determining the annual cycle of light available to microalgae. This light is referred to as photosynthetically available radiation (PAR). A known consequence of Arctic warming is the change...
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ftccsdartic:oai:HAL:hal-03458191v1 2023-05-15T14:36:54+02:00 Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere Laliberté, J. Bélanger, S. Babin, M. Takuvik Joint International Laboratory ULAVAL-CNRS Centre National de la Recherche Scientifique (CNRS)-Université Laval Québec (ULaval) Takuvik International Research Laboratory Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) 2021-07-16 https://hal.archives-ouvertes.fr/hal-03458191 https://doi.org/10.1525/elementa.2020.00083 en eng HAL CCSD University of California Press info:eu-repo/semantics/altIdentifier/doi/10.1525/elementa.2020.00083 hal-03458191 https://hal.archives-ouvertes.fr/hal-03458191 doi:10.1525/elementa.2020.00083 EISSN: 2325-1026 Elementa: Science of the Anthropocene https://hal.archives-ouvertes.fr/hal-03458191 Elementa: Science of the Anthropocene, University of California Press, 2021, 9 (1), ⟨10.1525/elementa.2020.00083⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1525/elementa.2020.00083 2021-12-04T23:25:34Z International audience The Arctic atmosphere–surface system transmits visible light from the Sun to the ocean, determining the annual cycle of light available to microalgae. This light is referred to as photosynthetically available radiation (PAR). A known consequence of Arctic warming is the change at the atmosphere–ocean interface (longer ice-free season, younger ice), implying an increase in the percentage of PAR being transferred to the water. However, much less is known about the recent changes in how much PAR is being transferred by the overlaying atmosphere. We studied the transfer of PAR through the atmosphere between May 21 and July 23 at a pan-Arctic scale for the period ranging from 2000 to 2016. By combining a large data set of atmospheric and surface conditions into a radiative transfer model, we computed the percentage of PAR transferred to the surface. We found that typical Arctic atmospheres convey between 60% and 70% of the incident PAR received from the Sun, meaning the Arctic atmosphere typically transmits more light than most sea ice surfaces, with the exception of mature melt ponds. We also found that the transfer of PAR through the atmosphere decreased at a rate of 2.3% per decade over the studied period, due to the increase in cloudiness and the weaker radiative interaction between the atmosphere and the surface. Further investigation is required to address how, in the warmer Arctic climate, this negative trend would compensate for the increased surface transmittance and its consequences on marine productivity. Article in Journal/Newspaper Arctic Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Elementa: Science of the Anthropocene 9 1 |
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 |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Laliberté, J. Bélanger, S. Babin, M. Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience The Arctic atmosphere–surface system transmits visible light from the Sun to the ocean, determining the annual cycle of light available to microalgae. This light is referred to as photosynthetically available radiation (PAR). A known consequence of Arctic warming is the change at the atmosphere–ocean interface (longer ice-free season, younger ice), implying an increase in the percentage of PAR being transferred to the water. However, much less is known about the recent changes in how much PAR is being transferred by the overlaying atmosphere. We studied the transfer of PAR through the atmosphere between May 21 and July 23 at a pan-Arctic scale for the period ranging from 2000 to 2016. By combining a large data set of atmospheric and surface conditions into a radiative transfer model, we computed the percentage of PAR transferred to the surface. We found that typical Arctic atmospheres convey between 60% and 70% of the incident PAR received from the Sun, meaning the Arctic atmosphere typically transmits more light than most sea ice surfaces, with the exception of mature melt ponds. We also found that the transfer of PAR through the atmosphere decreased at a rate of 2.3% per decade over the studied period, due to the increase in cloudiness and the weaker radiative interaction between the atmosphere and the surface. Further investigation is required to address how, in the warmer Arctic climate, this negative trend would compensate for the increased surface transmittance and its consequences on marine productivity. |
author2 |
Takuvik Joint International Laboratory ULAVAL-CNRS Centre National de la Recherche Scientifique (CNRS)-Université Laval Québec (ULaval) Takuvik International Research Laboratory Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Laliberté, J. Bélanger, S. Babin, M. |
author_facet |
Laliberté, J. Bélanger, S. Babin, M. |
author_sort |
Laliberté, J. |
title |
Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere |
title_short |
Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere |
title_full |
Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere |
title_fullStr |
Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere |
title_full_unstemmed |
Seasonal and interannual variations in the propagation of photosynthetically available radiation through the Arctic atmosphere |
title_sort |
seasonal and interannual variations in the propagation of photosynthetically available radiation through the arctic atmosphere |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03458191 https://doi.org/10.1525/elementa.2020.00083 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
EISSN: 2325-1026 Elementa: Science of the Anthropocene https://hal.archives-ouvertes.fr/hal-03458191 Elementa: Science of the Anthropocene, University of California Press, 2021, 9 (1), ⟨10.1525/elementa.2020.00083⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1525/elementa.2020.00083 hal-03458191 https://hal.archives-ouvertes.fr/hal-03458191 doi:10.1525/elementa.2020.00083 |
op_doi |
https://doi.org/10.1525/elementa.2020.00083 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766309436839690240 |