Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere
A new calibration database of census counts of organic-walled dinoflagellate cyst (dinocyst) assemblages has been developed from the analyses of surface sediment samples collected at middle to high latitudes of the Northern Hemisphere after standardisation of taxonomy and laboratory procedures. The...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.738562 2023-05-15T15:14:52+02:00 Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere de Vernal, Anne Eynaud, Frédérique Henry, Maryse Hillaire-Marcel, Claude Londeix, Laurent Mangin, Sylvie Matthiessen, Jens Marret, Fabienne Radi, Taoufik Rochon, André Solignac, Sandrine Turon, Jean-Louis 2005-06-02 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.738562 https://doi.org/10.1594/PANGAEA.738562 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.738562 https://doi.org/10.1594/PANGAEA.738562 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: de Vernal, Anne; Eynaud, Frédérique; Henry, Maryse; Hillaire-Marcel, Claude; Londeix, Laurent; Mangin, Sylvie; Matthiessen, Jens; Marret, Fabienne; Radi, Taoufik; Rochon, André; Solignac, Sandrine; Turon, Jean-Louis (2005): Reconstruction of sea-surface conditions at middle to highlatitudes of the Northern Hemisphere during the Last Glacial Maximum(LGM) based on dinoflagellate cyst assemblages. Quaternary Science Reviews, 24(7-9), 897-924, https://doi.org/10.1016/j.quascirev.2004.06.014 LIT Literary studies MARGO MARGO_0000 Multiproxy Approach for the Reconstruction of the Glacial Ocean surface Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.738562 https://doi.org/10.1016/j.quascirev.2004.06.014 2023-01-20T07:31:48Z A new calibration database of census counts of organic-walled dinoflagellate cyst (dinocyst) assemblages has been developed from the analyses of surface sediment samples collected at middle to high latitudes of the Northern Hemisphere after standardisation of taxonomy and laboratory procedures. The database comprises 940 reference data points from the North Atlantic, Arctic and North Pacific oceans and their adjacent seas, including the Mediterranean Sea, as well as epicontinental environments such as the Estuary and Gulf of St. Lawrence, the Bering Sea and the Hudson Bay. The relative abundance of taxa was analysed to describe the distribution of assemblages. The best analogue technique was used for the reconstruction of Last Glacial Maximum (LGM) sea-surface temperature and salinity during summer and winter, in addition to sea-ice cover extent, at sites from the North Atlantic (n=63), Mediterranean Sea (n=1) and eastern North Pacific (n=1). Three of the North Atlantic cores, from the continental margin of eastern Canada, revealed a barren LGM interval, probably because of quasi-permanent sea ice. Six other cores from the Greenland and Norwegian seas were excluded from the compilation because of too sparse assemblages and poor analogue situation. At the remaining sites (n= 54), relatively close modern analogues were found for most LGM samples, which allowed reconstructions. The new LGM results are consistent with previous reconstructions based on dinocyst data, which show much cooler conditions than at present along the continental margins of Canada and Europe, but sharp gradients of increasing temperature offshore. The results also suggest low salinity and larger than present contrasts in seasonal temperatures with colder winters and more extensive sea-ice cover, whereas relatively warm conditions may have prevailed offshore in summer. From these data, we hypothesise low thermal inertia in a shallow and low-density surface water layer. Dataset Arctic Atlantic Arctic Atlantic-Arctic Bering Sea Greenland Hudson Bay North Atlantic Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Bering Sea Hudson Bay Canada Greenland Pacific Hudson |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
LIT Literary studies MARGO MARGO_0000 Multiproxy Approach for the Reconstruction of the Glacial Ocean surface |
spellingShingle |
LIT Literary studies MARGO MARGO_0000 Multiproxy Approach for the Reconstruction of the Glacial Ocean surface de Vernal, Anne Eynaud, Frédérique Henry, Maryse Hillaire-Marcel, Claude Londeix, Laurent Mangin, Sylvie Matthiessen, Jens Marret, Fabienne Radi, Taoufik Rochon, André Solignac, Sandrine Turon, Jean-Louis Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere |
topic_facet |
LIT Literary studies MARGO MARGO_0000 Multiproxy Approach for the Reconstruction of the Glacial Ocean surface |
description |
A new calibration database of census counts of organic-walled dinoflagellate cyst (dinocyst) assemblages has been developed from the analyses of surface sediment samples collected at middle to high latitudes of the Northern Hemisphere after standardisation of taxonomy and laboratory procedures. The database comprises 940 reference data points from the North Atlantic, Arctic and North Pacific oceans and their adjacent seas, including the Mediterranean Sea, as well as epicontinental environments such as the Estuary and Gulf of St. Lawrence, the Bering Sea and the Hudson Bay. The relative abundance of taxa was analysed to describe the distribution of assemblages. The best analogue technique was used for the reconstruction of Last Glacial Maximum (LGM) sea-surface temperature and salinity during summer and winter, in addition to sea-ice cover extent, at sites from the North Atlantic (n=63), Mediterranean Sea (n=1) and eastern North Pacific (n=1). Three of the North Atlantic cores, from the continental margin of eastern Canada, revealed a barren LGM interval, probably because of quasi-permanent sea ice. Six other cores from the Greenland and Norwegian seas were excluded from the compilation because of too sparse assemblages and poor analogue situation. At the remaining sites (n= 54), relatively close modern analogues were found for most LGM samples, which allowed reconstructions. The new LGM results are consistent with previous reconstructions based on dinocyst data, which show much cooler conditions than at present along the continental margins of Canada and Europe, but sharp gradients of increasing temperature offshore. The results also suggest low salinity and larger than present contrasts in seasonal temperatures with colder winters and more extensive sea-ice cover, whereas relatively warm conditions may have prevailed offshore in summer. From these data, we hypothesise low thermal inertia in a shallow and low-density surface water layer. |
format |
Dataset |
author |
de Vernal, Anne Eynaud, Frédérique Henry, Maryse Hillaire-Marcel, Claude Londeix, Laurent Mangin, Sylvie Matthiessen, Jens Marret, Fabienne Radi, Taoufik Rochon, André Solignac, Sandrine Turon, Jean-Louis |
author_facet |
de Vernal, Anne Eynaud, Frédérique Henry, Maryse Hillaire-Marcel, Claude Londeix, Laurent Mangin, Sylvie Matthiessen, Jens Marret, Fabienne Radi, Taoufik Rochon, André Solignac, Sandrine Turon, Jean-Louis |
author_sort |
de Vernal, Anne |
title |
Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere |
title_short |
Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere |
title_full |
Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere |
title_fullStr |
Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere |
title_full_unstemmed |
Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere |
title_sort |
reconstruction of sea-surface conditions at middle to high latitudes of the northern hemisphere |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.738562 https://doi.org/10.1594/PANGAEA.738562 |
geographic |
Arctic Bering Sea Hudson Bay Canada Greenland Pacific Hudson |
geographic_facet |
Arctic Bering Sea Hudson Bay Canada Greenland Pacific Hudson |
genre |
Arctic Atlantic Arctic Atlantic-Arctic Bering Sea Greenland Hudson Bay North Atlantic Sea ice |
genre_facet |
Arctic Atlantic Arctic Atlantic-Arctic Bering Sea Greenland Hudson Bay North Atlantic Sea ice |
op_source |
Supplement to: de Vernal, Anne; Eynaud, Frédérique; Henry, Maryse; Hillaire-Marcel, Claude; Londeix, Laurent; Mangin, Sylvie; Matthiessen, Jens; Marret, Fabienne; Radi, Taoufik; Rochon, André; Solignac, Sandrine; Turon, Jean-Louis (2005): Reconstruction of sea-surface conditions at middle to highlatitudes of the Northern Hemisphere during the Last Glacial Maximum(LGM) based on dinoflagellate cyst assemblages. Quaternary Science Reviews, 24(7-9), 897-924, https://doi.org/10.1016/j.quascirev.2004.06.014 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.738562 https://doi.org/10.1594/PANGAEA.738562 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.738562 https://doi.org/10.1016/j.quascirev.2004.06.014 |
_version_ |
1766345274019545088 |