Airborne observations of far-infrared upwelling radiance in the Arctic
International audience The first airborne measurements of the Far-InfraRed Radiometer (FIRR) were performed in April 2015 during the panarctic NETCARE campaign. Vertical profiles of spectral upwelling radiance in the range 8–50 µm were measured in clear and cloudy conditions from the surface up to 6...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135/document https://hal.archives-ouvertes.fr/hal-03187135/file/Libois2016_NETCARE.pdf https://doi.org/10.5194/acp-16-15689-2016 |
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ftccsdartic:oai:HAL:hal-03187135v1 2023-05-15T14:48:22+02:00 Airborne observations of far-infrared upwelling radiance in the Arctic Libois, Quentin Ivanescu, Liviu Blanchet, Jean-Pierre Schulz, Hannes Bozem, Heiko Leaitch, W. Richard, Burkart, Julia Abbatt, Jonathan, Herber, Andreas, Aliabadi, Amir, Girard, Éric Centre ESCER Université du Québec à Montréal = University of Québec in Montréal (UQAM) Alfred Wegener Institute for Polar and Marine Research (AWI) Institute for Atmospheric Physics Mainz (IPA) Johannes Gutenberg - Universität Mainz (JGU) Environment and Climate Change Canada Department of Chemistry University of Toronto University of Toronto University of Guelph 2016 https://hal.archives-ouvertes.fr/hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135/document https://hal.archives-ouvertes.fr/hal-03187135/file/Libois2016_NETCARE.pdf https://doi.org/10.5194/acp-16-15689-2016 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-16-15689-2016 hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135/document https://hal.archives-ouvertes.fr/hal-03187135/file/Libois2016_NETCARE.pdf doi:10.5194/acp-16-15689-2016 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.archives-ouvertes.fr/hal-03187135 Atmospheric Chemistry and Physics, European Geosciences Union, 2016, 16 (24), pp.15689 - 15707. ⟨10.5194/acp-16-15689-2016⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.5194/acp-16-15689-2016 2021-04-03T22:21:45Z International audience The first airborne measurements of the Far-InfraRed Radiometer (FIRR) were performed in April 2015 during the panarctic NETCARE campaign. Vertical profiles of spectral upwelling radiance in the range 8–50 µm were measured in clear and cloudy conditions from the surface up to 6 km. The clear sky profiles highlight the strong dependence of radiative fluxes to the temperature inversion typical of the Arctic. Measurements acquired for total column water vapour from 1.5 to 10.5 mm also underline the sensitivity of the far-infrared greenhouse effect to specific humidity. The cloudy cases show that optically thin ice clouds increase the cooling rate of the atmosphere, making them important pieces of the Arctic energy balance. One such cloud exhibited a very complex spatial structure, characterized by large horizontal heterogeneities at the kilometre scale. This emphasizes the difficulty of obtaining representative cloud observations with airborne measurements but also points out how challenging it is to model polar clouds radiative effects. These radiance measurements were successfully compared to simulations, suggesting that state-of-the-art radiative transfer models are suited to study the cold and dry Arctic atmosphere. Although FIRR in situ performances compare well to its laboratory performances, complementary simulations show that upgrading the FIRR radiometric resolution would greatly increase its sensitivity to atmospheric and cloud properties. Improved instrument temperature stability in flight and expected technological progress should help meet this objective. The campaign overall highlights the potential for airborne far-infrared radiometry and constitutes a relevant reference for future similar studies dedicated to the Arctic and for the development of spaceborne instruments. Article in Journal/Newspaper Arctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Atmospheric Chemistry and Physics 16 24 15689 15707 |
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 |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Libois, Quentin Ivanescu, Liviu Blanchet, Jean-Pierre Schulz, Hannes Bozem, Heiko Leaitch, W. Richard, Burkart, Julia Abbatt, Jonathan, Herber, Andreas, Aliabadi, Amir, Girard, Éric Airborne observations of far-infrared upwelling radiance in the Arctic |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience The first airborne measurements of the Far-InfraRed Radiometer (FIRR) were performed in April 2015 during the panarctic NETCARE campaign. Vertical profiles of spectral upwelling radiance in the range 8–50 µm were measured in clear and cloudy conditions from the surface up to 6 km. The clear sky profiles highlight the strong dependence of radiative fluxes to the temperature inversion typical of the Arctic. Measurements acquired for total column water vapour from 1.5 to 10.5 mm also underline the sensitivity of the far-infrared greenhouse effect to specific humidity. The cloudy cases show that optically thin ice clouds increase the cooling rate of the atmosphere, making them important pieces of the Arctic energy balance. One such cloud exhibited a very complex spatial structure, characterized by large horizontal heterogeneities at the kilometre scale. This emphasizes the difficulty of obtaining representative cloud observations with airborne measurements but also points out how challenging it is to model polar clouds radiative effects. These radiance measurements were successfully compared to simulations, suggesting that state-of-the-art radiative transfer models are suited to study the cold and dry Arctic atmosphere. Although FIRR in situ performances compare well to its laboratory performances, complementary simulations show that upgrading the FIRR radiometric resolution would greatly increase its sensitivity to atmospheric and cloud properties. Improved instrument temperature stability in flight and expected technological progress should help meet this objective. The campaign overall highlights the potential for airborne far-infrared radiometry and constitutes a relevant reference for future similar studies dedicated to the Arctic and for the development of spaceborne instruments. |
author2 |
Centre ESCER Université du Québec à Montréal = University of Québec in Montréal (UQAM) Alfred Wegener Institute for Polar and Marine Research (AWI) Institute for Atmospheric Physics Mainz (IPA) Johannes Gutenberg - Universität Mainz (JGU) Environment and Climate Change Canada Department of Chemistry University of Toronto University of Toronto University of Guelph |
format |
Article in Journal/Newspaper |
author |
Libois, Quentin Ivanescu, Liviu Blanchet, Jean-Pierre Schulz, Hannes Bozem, Heiko Leaitch, W. Richard, Burkart, Julia Abbatt, Jonathan, Herber, Andreas, Aliabadi, Amir, Girard, Éric |
author_facet |
Libois, Quentin Ivanescu, Liviu Blanchet, Jean-Pierre Schulz, Hannes Bozem, Heiko Leaitch, W. Richard, Burkart, Julia Abbatt, Jonathan, Herber, Andreas, Aliabadi, Amir, Girard, Éric |
author_sort |
Libois, Quentin |
title |
Airborne observations of far-infrared upwelling radiance in the Arctic |
title_short |
Airborne observations of far-infrared upwelling radiance in the Arctic |
title_full |
Airborne observations of far-infrared upwelling radiance in the Arctic |
title_fullStr |
Airborne observations of far-infrared upwelling radiance in the Arctic |
title_full_unstemmed |
Airborne observations of far-infrared upwelling radiance in the Arctic |
title_sort |
airborne observations of far-infrared upwelling radiance in the arctic |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135/document https://hal.archives-ouvertes.fr/hal-03187135/file/Libois2016_NETCARE.pdf https://doi.org/10.5194/acp-16-15689-2016 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.archives-ouvertes.fr/hal-03187135 Atmospheric Chemistry and Physics, European Geosciences Union, 2016, 16 (24), pp.15689 - 15707. ⟨10.5194/acp-16-15689-2016⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-16-15689-2016 hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135 https://hal.archives-ouvertes.fr/hal-03187135/document https://hal.archives-ouvertes.fr/hal-03187135/file/Libois2016_NETCARE.pdf doi:10.5194/acp-16-15689-2016 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-16-15689-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
24 |
container_start_page |
15689 |
op_container_end_page |
15707 |
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