Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest
International audience Helicopter based simultaneous measurements of broadband surface albedo and the effective leaf area index (LAI eff ) were carried out in subarctic area of Finnish Lapland in spring 2008, 2009, and 2010 under varying illumination and snow cover conditions. Vertical profile measu...
Published in: | Journal of Geophysical Research: Atmospheres |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://insu.hal.science/insu-03668295 https://insu.hal.science/insu-03668295/document https://insu.hal.science/insu-03668295/file/JGR%20Atmospheres%20-%202021%20-%20Manninen%20-%20Airborne%20Measurements%20of%20Surface%20Albedo%20and%20Leaf%20Area%20Index%20of%20Snow_E2_80_90Covered%20Boreal.pdf https://doi.org/10.1029/2021JD035376 |
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ftinsu:oai:HAL:insu-03668295v1 2023-12-17T10:50:47+01:00 Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest Manninen, Terhikki Roujean, Jean-Louis Hautecoeur, Olivier Riihelä, Aku Lahtinen, Panu Jääskeläinen, Emmihenna Siljamo, Niilo Anttila, Kati Sukuvaara, Timo Korhonen, Lauri Centre d'études spatiales de la biosphère (CESBIO) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Météo-France 2022 https://insu.hal.science/insu-03668295 https://insu.hal.science/insu-03668295/document https://insu.hal.science/insu-03668295/file/JGR%20Atmospheres%20-%202021%20-%20Manninen%20-%20Airborne%20Measurements%20of%20Surface%20Albedo%20and%20Leaf%20Area%20Index%20of%20Snow_E2_80_90Covered%20Boreal.pdf https://doi.org/10.1029/2021JD035376 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035376 insu-03668295 https://insu.hal.science/insu-03668295 https://insu.hal.science/insu-03668295/document https://insu.hal.science/insu-03668295/file/JGR%20Atmospheres%20-%202021%20-%20Manninen%20-%20Airborne%20Measurements%20of%20Surface%20Albedo%20and%20Leaf%20Area%20Index%20of%20Snow_E2_80_90Covered%20Boreal.pdf BIBCODE: 2022JGRD.12735376M doi:10.1029/2021JD035376 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://insu.hal.science/insu-03668295 Journal of Geophysical Research: Atmospheres, 2022, 127, ⟨10.1029/2021JD035376⟩ albedo snow boreal forest airborne leaf area index satellite [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1029/2021JD035376 2023-11-22T17:28:09Z International audience Helicopter based simultaneous measurements of broadband surface albedo and the effective leaf area index (LAI eff ) were carried out in subarctic area of Finnish Lapland in spring 2008, 2009, and 2010 under varying illumination and snow cover conditions. Vertical profile measurements show that the found relationship between albedo and LAI eff seems to be rather independent of the flight altitude and therefore the footprint scale. Actually, flights above 500 m in altitude revealed low variations of the surface albedo approaching an aerial average at 1 km, meaning that a footprint of 20 km is representative of the landscape. The albedo of the area was beta distributed, and without LAI eff values below 0.25, the average albedo value of the area would decrease from 0.49 to 0.44 showing the albedo sensitivity to sparse vegetation. The results agreed with the photon recollision probability based model PARAS and the MODIS satellite albedo product MCD43A3. However, differences between satellite based and airborne albedo values were noticed, which could be explained by a difference in footprint size and/or the strong local heterogeneity as certain flights were operated on specific targets. Article in Journal/Newspaper Subarctic Lapland Institut national des sciences de l'Univers: HAL-INSU Paras ENVELOPE(20.139,20.139,69.111,69.111) Journal of Geophysical Research: Atmospheres 127 1 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
albedo snow boreal forest airborne leaf area index satellite [SDU]Sciences of the Universe [physics] |
spellingShingle |
albedo snow boreal forest airborne leaf area index satellite [SDU]Sciences of the Universe [physics] Manninen, Terhikki Roujean, Jean-Louis Hautecoeur, Olivier Riihelä, Aku Lahtinen, Panu Jääskeläinen, Emmihenna Siljamo, Niilo Anttila, Kati Sukuvaara, Timo Korhonen, Lauri Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest |
topic_facet |
albedo snow boreal forest airborne leaf area index satellite [SDU]Sciences of the Universe [physics] |
description |
International audience Helicopter based simultaneous measurements of broadband surface albedo and the effective leaf area index (LAI eff ) were carried out in subarctic area of Finnish Lapland in spring 2008, 2009, and 2010 under varying illumination and snow cover conditions. Vertical profile measurements show that the found relationship between albedo and LAI eff seems to be rather independent of the flight altitude and therefore the footprint scale. Actually, flights above 500 m in altitude revealed low variations of the surface albedo approaching an aerial average at 1 km, meaning that a footprint of 20 km is representative of the landscape. The albedo of the area was beta distributed, and without LAI eff values below 0.25, the average albedo value of the area would decrease from 0.49 to 0.44 showing the albedo sensitivity to sparse vegetation. The results agreed with the photon recollision probability based model PARAS and the MODIS satellite albedo product MCD43A3. However, differences between satellite based and airborne albedo values were noticed, which could be explained by a difference in footprint size and/or the strong local heterogeneity as certain flights were operated on specific targets. |
author2 |
Centre d'études spatiales de la biosphère (CESBIO) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Météo-France |
format |
Article in Journal/Newspaper |
author |
Manninen, Terhikki Roujean, Jean-Louis Hautecoeur, Olivier Riihelä, Aku Lahtinen, Panu Jääskeläinen, Emmihenna Siljamo, Niilo Anttila, Kati Sukuvaara, Timo Korhonen, Lauri |
author_facet |
Manninen, Terhikki Roujean, Jean-Louis Hautecoeur, Olivier Riihelä, Aku Lahtinen, Panu Jääskeläinen, Emmihenna Siljamo, Niilo Anttila, Kati Sukuvaara, Timo Korhonen, Lauri |
author_sort |
Manninen, Terhikki |
title |
Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest |
title_short |
Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest |
title_full |
Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest |
title_fullStr |
Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest |
title_full_unstemmed |
Airborne Measurements of Surface Albedo and Leaf Area Index of Snow-Covered Boreal Forest |
title_sort |
airborne measurements of surface albedo and leaf area index of snow-covered boreal forest |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03668295 https://insu.hal.science/insu-03668295/document https://insu.hal.science/insu-03668295/file/JGR%20Atmospheres%20-%202021%20-%20Manninen%20-%20Airborne%20Measurements%20of%20Surface%20Albedo%20and%20Leaf%20Area%20Index%20of%20Snow_E2_80_90Covered%20Boreal.pdf https://doi.org/10.1029/2021JD035376 |
long_lat |
ENVELOPE(20.139,20.139,69.111,69.111) |
geographic |
Paras |
geographic_facet |
Paras |
genre |
Subarctic Lapland |
genre_facet |
Subarctic Lapland |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://insu.hal.science/insu-03668295 Journal of Geophysical Research: Atmospheres, 2022, 127, ⟨10.1029/2021JD035376⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021JD035376 insu-03668295 https://insu.hal.science/insu-03668295 https://insu.hal.science/insu-03668295/document https://insu.hal.science/insu-03668295/file/JGR%20Atmospheres%20-%202021%20-%20Manninen%20-%20Airborne%20Measurements%20of%20Surface%20Albedo%20and%20Leaf%20Area%20Index%20of%20Snow_E2_80_90Covered%20Boreal.pdf BIBCODE: 2022JGRD.12735376M doi:10.1029/2021JD035376 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021JD035376 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
127 |
container_issue |
1 |
_version_ |
1785575855768993792 |