DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY
International audience A data base of 179 reference sites documents the relations between the assemblages of organic-walled dinoflagellate cysts and sea-surface temperature, salinity, and seasonality throughout the North Atlantic, adjacent subpolar basins (Labrador Sea, Baffin Bay, Irminger and Icel...
Published in: | Canadian Journal of Earth Sciences |
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1994
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Online Access: | https://hal.science/hal-01457661 https://doi.org/10.1139/e94-006 |
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ftunivavignon:oai:HAL:hal-01457661v1 2023-05-15T15:35:07+02:00 DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY de Vernal, A Turon, Jl Guiot, Joel Institut Méditerranéen d'Ecologie et de Paléoécologie (IMEP) Université Paul Cézanne - Aix-Marseille 3-Université de Provence - Aix-Marseille 1-Avignon Université (AU)-Centre National de la Recherche Scientifique (CNRS) 1994-01 https://hal.science/hal-01457661 https://doi.org/10.1139/e94-006 en eng HAL CCSD National Research Council Canada info:eu-repo/semantics/altIdentifier/doi/10.1139/e94-006 hal-01457661 https://hal.science/hal-01457661 doi:10.1139/e94-006 ISSN: 0008-4077 EISSN: 1480-3313 Canadian journal of earth sciences https://hal.science/hal-01457661 Canadian journal of earth sciences, 1994, 31 (1), pp.48-62. ⟨10.1139/e94-006⟩ [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 1994 ftunivavignon https://doi.org/10.1139/e94-006 2023-02-15T00:09:00Z International audience A data base of 179 reference sites documents the relations between the assemblages of organic-walled dinoflagellate cysts and sea-surface temperature, salinity, and seasonality throughout the North Atlantic, adjacent subpolar basins (Labrador Sea, Baffin Bay, Irminger and Iceland basins) and epicontinental environments off eastern Canada (estuary and Gulf of St. Lawrence, Hudson Bay). Principal-component analyses show close relationships between dinoflagellate cyst data and sea-surface conditions: the first component (71.1 % of the variance) correlates with the winter temperature, salinity, and seasonal duration of sea-ice cover, whereas the second component (11.3 % of the variance) appears mainly related to summer temperature. Transfer functions using the best analogue method were tested by reconstructing modern sea-surface conditions on the basis of the reference dinoflagellate cyst assemblages. The correlation coefficient between instrumental averages and reconstructed values ranges from 0.87 (August temperature) to 0.97 (annual duration of sea-ice cover). These transfer functions appear most accurate for the reconstruction of sea-surface conditions in marginal marine environments of high-latitude basins. The only reservation concerns the validity of reconstruction in offshore regions characterized by low productivity where sparse cyst fluxes may result from long-distance transport through currents. The transfer functions that were applied in, as an example, a late Quaternary sequence of the Davis Strait in the northern Labrador Sea, notably suggest seasonal sea-ice cover extent of 6 - 10 months/year and August temperature and salinity of 1-4-degrees-C and 31 - 33 parts per thousand, respectively, during the last glacial optimum (isotopic stage 2). Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Davis Strait Hudson Bay Iceland Labrador Sea North Atlantic Sea ice Université d'Avignon et des Pays de Vaucluse: HAL Baffin Bay Canada Hudson Hudson Bay Canadian Journal of Earth Sciences 31 1 48 62 |
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Open Polar |
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Université d'Avignon et des Pays de Vaucluse: HAL |
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ftunivavignon |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.MCG]Environmental Sciences/Global Changes de Vernal, A Turon, Jl Guiot, Joel DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience A data base of 179 reference sites documents the relations between the assemblages of organic-walled dinoflagellate cysts and sea-surface temperature, salinity, and seasonality throughout the North Atlantic, adjacent subpolar basins (Labrador Sea, Baffin Bay, Irminger and Iceland basins) and epicontinental environments off eastern Canada (estuary and Gulf of St. Lawrence, Hudson Bay). Principal-component analyses show close relationships between dinoflagellate cyst data and sea-surface conditions: the first component (71.1 % of the variance) correlates with the winter temperature, salinity, and seasonal duration of sea-ice cover, whereas the second component (11.3 % of the variance) appears mainly related to summer temperature. Transfer functions using the best analogue method were tested by reconstructing modern sea-surface conditions on the basis of the reference dinoflagellate cyst assemblages. The correlation coefficient between instrumental averages and reconstructed values ranges from 0.87 (August temperature) to 0.97 (annual duration of sea-ice cover). These transfer functions appear most accurate for the reconstruction of sea-surface conditions in marginal marine environments of high-latitude basins. The only reservation concerns the validity of reconstruction in offshore regions characterized by low productivity where sparse cyst fluxes may result from long-distance transport through currents. The transfer functions that were applied in, as an example, a late Quaternary sequence of the Davis Strait in the northern Labrador Sea, notably suggest seasonal sea-ice cover extent of 6 - 10 months/year and August temperature and salinity of 1-4-degrees-C and 31 - 33 parts per thousand, respectively, during the last glacial optimum (isotopic stage 2). |
author2 |
Institut Méditerranéen d'Ecologie et de Paléoécologie (IMEP) Université Paul Cézanne - Aix-Marseille 3-Université de Provence - Aix-Marseille 1-Avignon Université (AU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
de Vernal, A Turon, Jl Guiot, Joel |
author_facet |
de Vernal, A Turon, Jl Guiot, Joel |
author_sort |
de Vernal, A |
title |
DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY |
title_short |
DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY |
title_full |
DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY |
title_fullStr |
DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY |
title_full_unstemmed |
DINOFLAGELLATE CYST DISTRIBUTION IN HIGH-LATITUDE MARINE ENVIRONMENTS AND QUANTITATIVE RECONSTRUCTION OF SEA-SURFACE SALINITY, TEMPERATURE, AND SEASONALITY |
title_sort |
dinoflagellate cyst distribution in high-latitude marine environments and quantitative reconstruction of sea-surface salinity, temperature, and seasonality |
publisher |
HAL CCSD |
publishDate |
1994 |
url |
https://hal.science/hal-01457661 https://doi.org/10.1139/e94-006 |
geographic |
Baffin Bay Canada Hudson Hudson Bay |
geographic_facet |
Baffin Bay Canada Hudson Hudson Bay |
genre |
Baffin Bay Baffin Bay Baffin Davis Strait Hudson Bay Iceland Labrador Sea North Atlantic Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Davis Strait Hudson Bay Iceland Labrador Sea North Atlantic Sea ice |
op_source |
ISSN: 0008-4077 EISSN: 1480-3313 Canadian journal of earth sciences https://hal.science/hal-01457661 Canadian journal of earth sciences, 1994, 31 (1), pp.48-62. ⟨10.1139/e94-006⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1139/e94-006 hal-01457661 https://hal.science/hal-01457661 doi:10.1139/e94-006 |
op_doi |
https://doi.org/10.1139/e94-006 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
31 |
container_issue |
1 |
container_start_page |
48 |
op_container_end_page |
62 |
_version_ |
1766365408653213696 |