The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada
Abstract Climate changes over the past two millennia in the central part of the Gulf of St. Lawrence are documented in this paper with the aim of determining and understanding the natural climate variability and the impact of anthropogenic forcing at a regional scale. The palynological content (dino...
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crcambridgeupr:10.1017/qua.2021.56 2024-04-28T08:10:54+00:00 The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada Wu, Xiner de Vernal, Anne Fréchette, Bianca Moros, Matthias Perner, Kerstin 2021 http://dx.doi.org/10.1017/qua.2021.56 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589421000569 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 106, page 28-43 ISSN 0033-5894 1096-0287 General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) journal-article 2021 crcambridgeupr https://doi.org/10.1017/qua.2021.56 2024-04-09T06:55:28Z Abstract Climate changes over the past two millennia in the central part of the Gulf of St. Lawrence are documented in this paper with the aim of determining and understanding the natural climate variability and the impact of anthropogenic forcing at a regional scale. The palynological content (dinocysts, pollen, and spores) of the composite marine sediment core MSM46-03 collected in the Laurentian Channel was used to reconstruct oceanographic and climatic changes with a multidecadal temporal resolution. Sea-surface conditions, including summer salinity and temperature, sea-ice cover, and primary productivity, were reconstructed from dinocyst assemblages. Results revealed a remarkable cooling trend of about 4°C after 1230 cal yr BP (720 CE) and a culmination with a cold pulse dated to 170–40 cal yr BP (1780–1910 CE), which likely corresponds to the regional signal of the Little Ice Age. This cold interval was followed by a rapid warming of about 3°C. In the pollen assemblages, the decrease of Pinus abundance over the past 1700 yr suggests changes in wind regimes, likely resulting from increased southerly incursions of cold and dry Arctic air masses into southeastern Canada. Article in Journal/Newspaper Arctic Sea ice Cambridge University Press Quaternary Research 1 16 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
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General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) Wu, Xiner de Vernal, Anne Fréchette, Bianca Moros, Matthias Perner, Kerstin The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada |
topic_facet |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
description |
Abstract Climate changes over the past two millennia in the central part of the Gulf of St. Lawrence are documented in this paper with the aim of determining and understanding the natural climate variability and the impact of anthropogenic forcing at a regional scale. The palynological content (dinocysts, pollen, and spores) of the composite marine sediment core MSM46-03 collected in the Laurentian Channel was used to reconstruct oceanographic and climatic changes with a multidecadal temporal resolution. Sea-surface conditions, including summer salinity and temperature, sea-ice cover, and primary productivity, were reconstructed from dinocyst assemblages. Results revealed a remarkable cooling trend of about 4°C after 1230 cal yr BP (720 CE) and a culmination with a cold pulse dated to 170–40 cal yr BP (1780–1910 CE), which likely corresponds to the regional signal of the Little Ice Age. This cold interval was followed by a rapid warming of about 3°C. In the pollen assemblages, the decrease of Pinus abundance over the past 1700 yr suggests changes in wind regimes, likely resulting from increased southerly incursions of cold and dry Arctic air masses into southeastern Canada. |
format |
Article in Journal/Newspaper |
author |
Wu, Xiner de Vernal, Anne Fréchette, Bianca Moros, Matthias Perner, Kerstin |
author_facet |
Wu, Xiner de Vernal, Anne Fréchette, Bianca Moros, Matthias Perner, Kerstin |
author_sort |
Wu, Xiner |
title |
The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada |
title_short |
The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada |
title_full |
The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada |
title_fullStr |
The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada |
title_full_unstemmed |
The signal of climate changes over the last two millennia in the Gulf of St. Lawrence, eastern Canada |
title_sort |
signal of climate changes over the last two millennia in the gulf of st. lawrence, eastern canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/qua.2021.56 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589421000569 |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Quaternary Research volume 106, page 28-43 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2021.56 |
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Quaternary Research |
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