Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland
International audience This study presents a modern database including 831 pollen assemblages from lakes of the Boreal, Subarctic and Arctic biomes of North America and Greenland, and corresponding temperature, sunshine and precipitation. Pollen data include the 39 most common vascular taxa (18 wood...
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ftunivaixmarseil:oai:HAL:hal-01457766v1 2024-04-28T08:07:30+00:00 Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland Frechette, Bianca Vernal, Anne, De Guiot, Joel Wolfe, Alexander P. Miller, Gifford H. Fredskild, Bent Kerwin, Micheal W. Richard, Pierre J. H. Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2008-06 https://hal.science/hal-01457766 https://doi.org/10.1016/j.quascirev.2008.02.016 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2008.02.016 hal-01457766 https://hal.science/hal-01457766 doi:10.1016/j.quascirev.2008.02.016 ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-01457766 Quaternary Science Reviews, 2008, 27 (11-12), pp.1197-1216. ⟨10.1016/j.quascirev.2008.02.016⟩ [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2008 ftunivaixmarseil https://doi.org/10.1016/j.quascirev.2008.02.016 2024-04-04T17:37:38Z International audience This study presents a modern database including 831 pollen assemblages from lakes of the Boreal, Subarctic and Arctic biomes of North America and Greenland, and corresponding temperature, sunshine and precipitation. Pollen data include the 39 most common vascular taxa (18 woody plants and 21 herbs). Multivariate ordinations using correspondence analysis (CA) and canonical correspondence analysis (CCA) reveal that temperature and sunshine account, respectively, for 45.5% and 44.4% of the variance within pollen assemblages, whereas precipitation only accounts for 10.2% of total variance. CCA further demonstrates that the climatic information encapsulated in pollen assemblages is not the same for the three biomes. In the Boreal biome, precipitation and temperature account for most of the variance, whereas sunshine and precipitation are more determinant in the Subarctic biome, and the temperature and sunshine seem to exert the main control on the pollen distribution in the Arctic biome. The modern analogue technique (MAT) and CCA regressions were tested for reconstructing climate parameters. MAT yields better results than CCA regressions and validation tests indicate a root mean square error (RMSE) of 1.35 degrees C for July air temperature, 2.3% for July sunshine, 3.10 degrees C for January air temperature and 143 mm for annual precipitation. Two examples of reconstructions are presented from recent (<450 years) lake-sediment cores of eastern Baffin Island, Arctic Canada and southwest Greenland. They demonstrate that July air temperature and July sunshine can be reconstructed independently from Arctic pollen assemblages, but January air temperature and annual precipitation must be interpreted with caution. They also suggest that reconstruction of past sunshine variations can serve to document climate changes at synoptic scale including the North Atlantic Oscillation (NAO). (C) 2008 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Arctic Baffin Island Baffin Greenland North Atlantic North Atlantic oscillation Subarctic Aix-Marseille Université: HAL Quaternary Science Reviews 27 11-12 1197 1216 |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.MCG]Environmental Sciences/Global Changes Frechette, Bianca Vernal, Anne, De Guiot, Joel Wolfe, Alexander P. Miller, Gifford H. Fredskild, Bent Kerwin, Micheal W. Richard, Pierre J. H. Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience This study presents a modern database including 831 pollen assemblages from lakes of the Boreal, Subarctic and Arctic biomes of North America and Greenland, and corresponding temperature, sunshine and precipitation. Pollen data include the 39 most common vascular taxa (18 woody plants and 21 herbs). Multivariate ordinations using correspondence analysis (CA) and canonical correspondence analysis (CCA) reveal that temperature and sunshine account, respectively, for 45.5% and 44.4% of the variance within pollen assemblages, whereas precipitation only accounts for 10.2% of total variance. CCA further demonstrates that the climatic information encapsulated in pollen assemblages is not the same for the three biomes. In the Boreal biome, precipitation and temperature account for most of the variance, whereas sunshine and precipitation are more determinant in the Subarctic biome, and the temperature and sunshine seem to exert the main control on the pollen distribution in the Arctic biome. The modern analogue technique (MAT) and CCA regressions were tested for reconstructing climate parameters. MAT yields better results than CCA regressions and validation tests indicate a root mean square error (RMSE) of 1.35 degrees C for July air temperature, 2.3% for July sunshine, 3.10 degrees C for January air temperature and 143 mm for annual precipitation. Two examples of reconstructions are presented from recent (<450 years) lake-sediment cores of eastern Baffin Island, Arctic Canada and southwest Greenland. They demonstrate that July air temperature and July sunshine can be reconstructed independently from Arctic pollen assemblages, but January air temperature and annual precipitation must be interpreted with caution. They also suggest that reconstruction of past sunshine variations can serve to document climate changes at synoptic scale including the North Atlantic Oscillation (NAO). (C) 2008 Elsevier Ltd. All rights reserved. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Frechette, Bianca Vernal, Anne, De Guiot, Joel Wolfe, Alexander P. Miller, Gifford H. Fredskild, Bent Kerwin, Micheal W. Richard, Pierre J. H. |
author_facet |
Frechette, Bianca Vernal, Anne, De Guiot, Joel Wolfe, Alexander P. Miller, Gifford H. Fredskild, Bent Kerwin, Micheal W. Richard, Pierre J. H. |
author_sort |
Frechette, Bianca |
title |
Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland |
title_short |
Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland |
title_full |
Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland |
title_fullStr |
Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland |
title_full_unstemmed |
Methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in Arctic Canada and Greenland |
title_sort |
methodological basis for quantitative reconstruction of air temperature and sunshine from pollen assemblages in arctic canada and greenland |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-01457766 https://doi.org/10.1016/j.quascirev.2008.02.016 |
genre |
Arctic Baffin Island Baffin Greenland North Atlantic North Atlantic oscillation Subarctic |
genre_facet |
Arctic Baffin Island Baffin Greenland North Atlantic North Atlantic oscillation Subarctic |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-01457766 Quaternary Science Reviews, 2008, 27 (11-12), pp.1197-1216. ⟨10.1016/j.quascirev.2008.02.016⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2008.02.016 hal-01457766 https://hal.science/hal-01457766 doi:10.1016/j.quascirev.2008.02.016 |
op_doi |
https://doi.org/10.1016/j.quascirev.2008.02.016 |
container_title |
Quaternary Science Reviews |
container_volume |
27 |
container_issue |
11-12 |
container_start_page |
1197 |
op_container_end_page |
1216 |
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1797576594808635392 |