Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene
Abstract Variability in the abundance of exotic (non‐native) pollen in sediment cores has long been considered as a potential proxy for changing atmospheric circulation, but the difficulty of gaining sufficient total exotic pollen and the incomplete understanding of atmospheric pollen transport patt...
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crwiley:10.1002/jqs.1453 2024-06-23T07:53:18+00:00 Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene Jessen, Catherine A. Solignac, Sandrine Nørgaard‐Pedersen, Niels Mikkelsen, Naja Kuijpers, Antoon Seidenkrantz, Marit‐Solveig 2011 http://dx.doi.org/10.1002/jqs.1453 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1453 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1453 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 26, issue 3, page 286-296 ISSN 0267-8179 1099-1417 journal-article 2011 crwiley https://doi.org/10.1002/jqs.1453 2024-06-04T06:42:16Z Abstract Variability in the abundance of exotic (non‐native) pollen in sediment cores has long been considered as a potential proxy for changing atmospheric circulation, but the difficulty of gaining sufficient total exotic pollen and the incomplete understanding of atmospheric pollen transport patterns has hindered its application. In light of recent advances in the study of pollen transport, we present an exotic pollen record from two fjord sediment cores taken from the west (Placentia Bay, Newfoundland) and east (Narsaq Sund, Greenland) Labrador Sea as a basis for studying variations in regional atmospheric circulation. The two cores cover the last ca. 5500 years and indicate a shift in dominant spring/summer air masses at ca. 2000 (southern Greenland) and 3000 cal a BP (Newfoundland) transporting reduced concentrations of pollen from southerly and south‐westerly vegetation zones. This may suggest a shift away from more dominantly zonal atmospheric circulation (a feature of positive North Atlantic Oscillation years) to more frequent meridional circulation. These results support sea ice/sea‐surface temperature proxy reconstructions from Newfoundland, investigated as part of the same project, which also suggest increased winter atmospheric circulation during the early part of the time period studied. In this region, more positive North Atlantic Oscillation years, and therefore more zonal atmospheric circulation, are associated with increased atmospheric circulation in both the winter and the summer seasons. Copyright © 2011 John Wiley & Sons, Ltd. Article in Journal/Newspaper Greenland Labrador Sea Narsaq Newfoundland North Atlantic North Atlantic oscillation Sea ice Wiley Online Library Greenland Narsaq Sund ENVELOPE(-46.117,-46.117,60.917,60.917) Newfoundland Sund ENVELOPE(13.644,13.644,66.207,66.207) Journal of Quaternary Science 26 3 286 296 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Variability in the abundance of exotic (non‐native) pollen in sediment cores has long been considered as a potential proxy for changing atmospheric circulation, but the difficulty of gaining sufficient total exotic pollen and the incomplete understanding of atmospheric pollen transport patterns has hindered its application. In light of recent advances in the study of pollen transport, we present an exotic pollen record from two fjord sediment cores taken from the west (Placentia Bay, Newfoundland) and east (Narsaq Sund, Greenland) Labrador Sea as a basis for studying variations in regional atmospheric circulation. The two cores cover the last ca. 5500 years and indicate a shift in dominant spring/summer air masses at ca. 2000 (southern Greenland) and 3000 cal a BP (Newfoundland) transporting reduced concentrations of pollen from southerly and south‐westerly vegetation zones. This may suggest a shift away from more dominantly zonal atmospheric circulation (a feature of positive North Atlantic Oscillation years) to more frequent meridional circulation. These results support sea ice/sea‐surface temperature proxy reconstructions from Newfoundland, investigated as part of the same project, which also suggest increased winter atmospheric circulation during the early part of the time period studied. In this region, more positive North Atlantic Oscillation years, and therefore more zonal atmospheric circulation, are associated with increased atmospheric circulation in both the winter and the summer seasons. Copyright © 2011 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Jessen, Catherine A. Solignac, Sandrine Nørgaard‐Pedersen, Niels Mikkelsen, Naja Kuijpers, Antoon Seidenkrantz, Marit‐Solveig |
spellingShingle |
Jessen, Catherine A. Solignac, Sandrine Nørgaard‐Pedersen, Niels Mikkelsen, Naja Kuijpers, Antoon Seidenkrantz, Marit‐Solveig Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene |
author_facet |
Jessen, Catherine A. Solignac, Sandrine Nørgaard‐Pedersen, Niels Mikkelsen, Naja Kuijpers, Antoon Seidenkrantz, Marit‐Solveig |
author_sort |
Jessen, Catherine A. |
title |
Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene |
title_short |
Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene |
title_full |
Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene |
title_fullStr |
Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene |
title_full_unstemmed |
Exotic pollen as an indicator of variable atmospheric circulation over the Labrador Sea region during the mid to late Holocene |
title_sort |
exotic pollen as an indicator of variable atmospheric circulation over the labrador sea region during the mid to late holocene |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/jqs.1453 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1453 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1453 |
long_lat |
ENVELOPE(-46.117,-46.117,60.917,60.917) ENVELOPE(13.644,13.644,66.207,66.207) |
geographic |
Greenland Narsaq Sund Newfoundland Sund |
geographic_facet |
Greenland Narsaq Sund Newfoundland Sund |
genre |
Greenland Labrador Sea Narsaq Newfoundland North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Greenland Labrador Sea Narsaq Newfoundland North Atlantic North Atlantic oscillation Sea ice |
op_source |
Journal of Quaternary Science volume 26, issue 3, page 286-296 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1453 |
container_title |
Journal of Quaternary Science |
container_volume |
26 |
container_issue |
3 |
container_start_page |
286 |
op_container_end_page |
296 |
_version_ |
1802644879351742464 |