Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274
The application of quantitative and semiquantitative methods to assemblage data from dinoflagellate cysts shows potential for interpreting past environments, both in terms of paleotemperature estimates and in recognizing water masses and circulation patterns.Estimates of winter sea-surface temperatu...
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1991
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ftdatacite:10.1594/pangaea.743320 2023-05-15T17:32:01+02:00 Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 Edwards, Lucy Mudie, Peta J de Vernal, Anne 1991 application/zip https://dx.doi.org/10.1594/pangaea.743320 https://doi.pangaea.de/10.1594/PANGAEA.743320 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/0277-3791(91)90024-o Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Drilling/drill rig Leg81 Leg104 Leg105 Glomar Challenger Joides Resolution Deep Sea Drilling Project DSDP Ocean Drilling Program ODP article Supplementary Collection of Datasets Collection 1991 ftdatacite https://doi.org/10.1594/pangaea.743320 https://doi.org/10.1016/0277-3791(91)90024-o 2022-02-09T12:07:01Z The application of quantitative and semiquantitative methods to assemblage data from dinoflagellate cysts shows potential for interpreting past environments, both in terms of paleotemperature estimates and in recognizing water masses and circulation patterns.Estimates of winter sea-surface temperature (WSST) were produced by using the Impagidinium Index (II) method, and by applying a winter-temperature transfer function (TFw). Estimates of summer sea-surface temperature (SSST) were produced by using a summer-temperature transfer function (TFs), two methods based on a temperature-distribution chart (ACT and ACTpo), and a method based on the ratio of gonyaulacoid:protoperidinioid specimens (G:P).WSST estimates from the II and TFw methods are in close agreement except where Impagidinium species are sparse. SSST estimates from TFs are more variable. The value of the G:P ratio for the Pliocene data in this paper is limited by the apparent sparsity of protoperidinioids, which results in monotonous SSST estimates of 14-26°C. The ACT methods show two biases for the Pliocene data set: taxonomic substitution may force 'matches' yielding incorrect temperature estimates, and the method is highly sensitive to the end-points of species distributions.Dinocyst assemblage data were applied to reconstruct Pliocene sea-surface temperatures between 3.5-2.5 Ma from DSDP Hole 552A, and ODP Holes 646B and 642B, which are presently located beneath cold and cool-temperate waters north of 56°N.Our initial results suggest that at 3.0 Ma, WSSTs were a few degrees C warmer than the present and that there was a somewhat reduced north-south temperature gradient. For all three sites, it is likely that SSSTs were also warmer, but by an unknown, perhaps large, amount. Past oceanic circulation in the North Atlantic was probably different from the present. Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Peta ENVELOPE(36.866,36.866,63.158,63.158) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Drilling/drill rig Leg81 Leg104 Leg105 Glomar Challenger Joides Resolution Deep Sea Drilling Project DSDP Ocean Drilling Program ODP |
spellingShingle |
Drilling/drill rig Leg81 Leg104 Leg105 Glomar Challenger Joides Resolution Deep Sea Drilling Project DSDP Ocean Drilling Program ODP Edwards, Lucy Mudie, Peta J de Vernal, Anne Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 |
topic_facet |
Drilling/drill rig Leg81 Leg104 Leg105 Glomar Challenger Joides Resolution Deep Sea Drilling Project DSDP Ocean Drilling Program ODP |
description |
The application of quantitative and semiquantitative methods to assemblage data from dinoflagellate cysts shows potential for interpreting past environments, both in terms of paleotemperature estimates and in recognizing water masses and circulation patterns.Estimates of winter sea-surface temperature (WSST) were produced by using the Impagidinium Index (II) method, and by applying a winter-temperature transfer function (TFw). Estimates of summer sea-surface temperature (SSST) were produced by using a summer-temperature transfer function (TFs), two methods based on a temperature-distribution chart (ACT and ACTpo), and a method based on the ratio of gonyaulacoid:protoperidinioid specimens (G:P).WSST estimates from the II and TFw methods are in close agreement except where Impagidinium species are sparse. SSST estimates from TFs are more variable. The value of the G:P ratio for the Pliocene data in this paper is limited by the apparent sparsity of protoperidinioids, which results in monotonous SSST estimates of 14-26°C. The ACT methods show two biases for the Pliocene data set: taxonomic substitution may force 'matches' yielding incorrect temperature estimates, and the method is highly sensitive to the end-points of species distributions.Dinocyst assemblage data were applied to reconstruct Pliocene sea-surface temperatures between 3.5-2.5 Ma from DSDP Hole 552A, and ODP Holes 646B and 642B, which are presently located beneath cold and cool-temperate waters north of 56°N.Our initial results suggest that at 3.0 Ma, WSSTs were a few degrees C warmer than the present and that there was a somewhat reduced north-south temperature gradient. For all three sites, it is likely that SSSTs were also warmer, but by an unknown, perhaps large, amount. Past oceanic circulation in the North Atlantic was probably different from the present. |
format |
Article in Journal/Newspaper |
author |
Edwards, Lucy Mudie, Peta J de Vernal, Anne |
author_facet |
Edwards, Lucy Mudie, Peta J de Vernal, Anne |
author_sort |
Edwards, Lucy |
title |
Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 |
title_short |
Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 |
title_full |
Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 |
title_fullStr |
Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 |
title_full_unstemmed |
Sea surface temperature reconstruction based on dinoflagellates from the North Atlantic, supplement to: Edwards, Lucy; Mudie, Peta J; de Vernal, Anne (1991): Pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. Quaternary Science Reviews, 10(2-3), 259-274 |
title_sort |
sea surface temperature reconstruction based on dinoflagellates from the north atlantic, supplement to: edwards, lucy; mudie, peta j; de vernal, anne (1991): pliocene paleoclimatic reconstruction using dinoflagellate cysrs: comparison of methods. quaternary science reviews, 10(2-3), 259-274 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1991 |
url |
https://dx.doi.org/10.1594/pangaea.743320 https://doi.pangaea.de/10.1594/PANGAEA.743320 |
long_lat |
ENVELOPE(36.866,36.866,63.158,63.158) |
geographic |
Peta |
geographic_facet |
Peta |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1016/0277-3791(91)90024-o |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.743320 https://doi.org/10.1016/0277-3791(91)90024-o |
_version_ |
1766129937366908928 |