Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story
International audience Arctic vegetation cover has been increasing over the last 40 years, which has been attributed mostly to increases in temperature. Yet, the temporal dimension of this greening remains overlooked as it is often viewed as a monotonic trend. Here, using 11 year long rolling window...
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ftunivnantes:oai:HAL:hal-03736417v1 2023-05-15T14:57:20+02:00 Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story Bayle, Arthur Roy, Alexandre Dedieu, Jean-Pierre Boudreau, Stéphane Choler, P. Lévesque, Esther Laboratoire d'Ecologie Alpine (LECA ) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA) 2022-06-10 https://hal.archives-ouvertes.fr/hal-03736417 https://hal.archives-ouvertes.fr/hal-03736417/document https://hal.archives-ouvertes.fr/hal-03736417/file/Bayle%26al_ERL_2022.pdf https://doi.org/10.1088/1748-9326/ac74d6 en eng HAL CCSD IOP Publishing info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-9326/ac74d6 hal-03736417 https://hal.archives-ouvertes.fr/hal-03736417 https://hal.archives-ouvertes.fr/hal-03736417/document https://hal.archives-ouvertes.fr/hal-03736417/file/Bayle%26al_ERL_2022.pdf doi:10.1088/1748-9326/ac74d6 info:eu-repo/semantics/OpenAccess ISSN: 1748-9326 Environmental Research Letters https://hal.archives-ouvertes.fr/hal-03736417 Environmental Research Letters, IOP Publishing, 2022, 17 (6), pp.064051. ⟨10.1088/1748-9326/ac74d6⟩ greening Landsat high latitude vegetation NDVI [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1088/1748-9326/ac74d6 2022-08-02T22:50:18Z International audience Arctic vegetation cover has been increasing over the last 40 years, which has been attributed mostly to increases in temperature. Yet, the temporal dimension of this greening remains overlooked as it is often viewed as a monotonic trend. Here, using 11 year long rolling windows on 30 m resolution Landsat data, we examined the temporal variations in greening in north-eastern Canada and its dependence on summer warming. We found two significant and distinct waves of greening, centred around 1996 and 2011, and observed in all land cover types (from boreal forest to arctic tundra). The first wave was more intense and correlated with increasing summer temperature while no such relation was found for the weaker second wave. More specifically, the greening lasted longer at higher elevation during the first wave which translates to a prolonged correlation between greening and summer warming compared to low-altitude vegetation. Our work explored a forsaken complexity of high latitude greening trends and associated drivers and has raised new questions that warrant further research highlighting the importance to include temporal dimension to greening analyses in conjunction with common spatial gradients. Article in Journal/Newspaper Arctic Tundra Université de Nantes: HAL-UNIV-NANTES Arctic Canada Environmental Research Letters 17 6 064051 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
greening Landsat high latitude vegetation NDVI [SDE]Environmental Sciences |
spellingShingle |
greening Landsat high latitude vegetation NDVI [SDE]Environmental Sciences Bayle, Arthur Roy, Alexandre Dedieu, Jean-Pierre Boudreau, Stéphane Choler, P. Lévesque, Esther Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story |
topic_facet |
greening Landsat high latitude vegetation NDVI [SDE]Environmental Sciences |
description |
International audience Arctic vegetation cover has been increasing over the last 40 years, which has been attributed mostly to increases in temperature. Yet, the temporal dimension of this greening remains overlooked as it is often viewed as a monotonic trend. Here, using 11 year long rolling windows on 30 m resolution Landsat data, we examined the temporal variations in greening in north-eastern Canada and its dependence on summer warming. We found two significant and distinct waves of greening, centred around 1996 and 2011, and observed in all land cover types (from boreal forest to arctic tundra). The first wave was more intense and correlated with increasing summer temperature while no such relation was found for the weaker second wave. More specifically, the greening lasted longer at higher elevation during the first wave which translates to a prolonged correlation between greening and summer warming compared to low-altitude vegetation. Our work explored a forsaken complexity of high latitude greening trends and associated drivers and has raised new questions that warrant further research highlighting the importance to include temporal dimension to greening analyses in conjunction with common spatial gradients. |
author2 |
Laboratoire d'Ecologie Alpine (LECA ) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Bayle, Arthur Roy, Alexandre Dedieu, Jean-Pierre Boudreau, Stéphane Choler, P. Lévesque, Esther |
author_facet |
Bayle, Arthur Roy, Alexandre Dedieu, Jean-Pierre Boudreau, Stéphane Choler, P. Lévesque, Esther |
author_sort |
Bayle, Arthur |
title |
Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story |
title_short |
Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story |
title_full |
Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story |
title_fullStr |
Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story |
title_full_unstemmed |
Two distinct waves of greening in northeastern Canada: summer warming does not tell the whole story |
title_sort |
two distinct waves of greening in northeastern canada: summer warming does not tell the whole story |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.archives-ouvertes.fr/hal-03736417 https://hal.archives-ouvertes.fr/hal-03736417/document https://hal.archives-ouvertes.fr/hal-03736417/file/Bayle%26al_ERL_2022.pdf https://doi.org/10.1088/1748-9326/ac74d6 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
ISSN: 1748-9326 Environmental Research Letters https://hal.archives-ouvertes.fr/hal-03736417 Environmental Research Letters, IOP Publishing, 2022, 17 (6), pp.064051. ⟨10.1088/1748-9326/ac74d6⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-9326/ac74d6 hal-03736417 https://hal.archives-ouvertes.fr/hal-03736417 https://hal.archives-ouvertes.fr/hal-03736417/document https://hal.archives-ouvertes.fr/hal-03736417/file/Bayle%26al_ERL_2022.pdf doi:10.1088/1748-9326/ac74d6 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1088/1748-9326/ac74d6 |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
6 |
container_start_page |
064051 |
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1766329413772771328 |