Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes
A set of numerical equations is developed to estimate past sea surface temperatures (SST) from fossil Antarctic diatoms. These equations take into account both the biogeographic distribution and experimentally derived silica dissolution. The data represent a revision and expansion of a floral data b...
Main Authors: | , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
1992
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.727840 https://doi.org/10.1594/PANGAEA.727840 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.727840 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.727840 2023-05-15T13:42:09+02:00 Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes Pichon, Jean-Jacques Labeyrie, Laurent D Bareille, Gilles F Labracherie, Monique Duprat, Josette M Jouzel, Jean MEDIAN LATITUDE: -49.415000 * MEDIAN LONGITUDE: 62.300000 * SOUTH-BOUND LATITUDE: -55.008300 * WEST-BOUND LONGITUDE: 51.318300 * NORTH-BOUND LATITUDE: -43.821700 * EAST-BOUND LONGITUDE: 73.281700 * DATE/TIME START: 1984-01-01T00:00:00 * DATE/TIME END: 1984-01-01T00:00:00 1992-09-23 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.727840 https://doi.org/10.1594/PANGAEA.727840 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.727840 https://doi.org/10.1594/PANGAEA.727840 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pichon, Jean-Jacques; Labeyrie, Laurent D; Bareille, Gilles F; Labracherie, Monique; Duprat, Josette M; Jouzel, Jean (1992): Surface water temperature changesin the high latitudes of the southern hemisphere over the last glacial-interglacial cycle. Paleoceanography, 7(3), 289-318, https://doi.org/10.1029/92PA00709 APSARA2 Marion Dufresne (1972) MD38 MD84-527 MD84-551 PC Piston corer South Indian Ocean Dataset 1992 ftpangaea https://doi.org/10.1594/PANGAEA.727840 https://doi.org/10.1029/92PA00709 2023-01-20T07:31:31Z A set of numerical equations is developed to estimate past sea surface temperatures (SST) from fossil Antarctic diatoms. These equations take into account both the biogeographic distribution and experimentally derived silica dissolution. The data represent a revision and expansion of a floral data base used previously and includes samples resulting from progressive opal dissolution experiments. Factor analysis of 166 samples (124 Holocene core top and 42 artificial samples) resolved four factors. Three of these factors depend on the water mass distribution (one Subantarctic and two Antarctic assemblages); factor 4 corresponds to a 'dissolution assemblage'. Inclusion of this factor in the data analysis minimizes the effect of opal dissolution on the assemblages and gives accurate estimates of SST over a wide range of biosiliceous dissolution. A transfer function (DTF 166/34/4) is derived from the distribution of these factors versus summer SST. Its standard error is +/- 1°C in the -1 to +10 °C summer temperature range. This transfer function is used to estimate SST changes in two southern ocean cores (43°S and 55°S) which cover the last climatic cycle. The time scale is derived from the changes in foraminiferal oxygen and carbon isotopic ratios. The reconstructed SST records present strong analogies with the air temperature record over Antarctica at the Vostok site, derived from changes in the isotopic ratio of the ice. This similarity may be used to compare the oceanic isotope stratigraphy and the Vostok time scale derived from ice flow model. The oceanic time scale, if taken at face value, would indicate that large changes in ice accumulation rates occurred between warm and cold periods. Dataset Antarc* Antarctic Antarctica Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Indian Southern Ocean ENVELOPE(51.318300,73.281700,-43.821700,-55.008300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
APSARA2 Marion Dufresne (1972) MD38 MD84-527 MD84-551 PC Piston corer South Indian Ocean |
spellingShingle |
APSARA2 Marion Dufresne (1972) MD38 MD84-527 MD84-551 PC Piston corer South Indian Ocean Pichon, Jean-Jacques Labeyrie, Laurent D Bareille, Gilles F Labracherie, Monique Duprat, Josette M Jouzel, Jean Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
topic_facet |
APSARA2 Marion Dufresne (1972) MD38 MD84-527 MD84-551 PC Piston corer South Indian Ocean |
description |
A set of numerical equations is developed to estimate past sea surface temperatures (SST) from fossil Antarctic diatoms. These equations take into account both the biogeographic distribution and experimentally derived silica dissolution. The data represent a revision and expansion of a floral data base used previously and includes samples resulting from progressive opal dissolution experiments. Factor analysis of 166 samples (124 Holocene core top and 42 artificial samples) resolved four factors. Three of these factors depend on the water mass distribution (one Subantarctic and two Antarctic assemblages); factor 4 corresponds to a 'dissolution assemblage'. Inclusion of this factor in the data analysis minimizes the effect of opal dissolution on the assemblages and gives accurate estimates of SST over a wide range of biosiliceous dissolution. A transfer function (DTF 166/34/4) is derived from the distribution of these factors versus summer SST. Its standard error is +/- 1°C in the -1 to +10 °C summer temperature range. This transfer function is used to estimate SST changes in two southern ocean cores (43°S and 55°S) which cover the last climatic cycle. The time scale is derived from the changes in foraminiferal oxygen and carbon isotopic ratios. The reconstructed SST records present strong analogies with the air temperature record over Antarctica at the Vostok site, derived from changes in the isotopic ratio of the ice. This similarity may be used to compare the oceanic isotope stratigraphy and the Vostok time scale derived from ice flow model. The oceanic time scale, if taken at face value, would indicate that large changes in ice accumulation rates occurred between warm and cold periods. |
format |
Dataset |
author |
Pichon, Jean-Jacques Labeyrie, Laurent D Bareille, Gilles F Labracherie, Monique Duprat, Josette M Jouzel, Jean |
author_facet |
Pichon, Jean-Jacques Labeyrie, Laurent D Bareille, Gilles F Labracherie, Monique Duprat, Josette M Jouzel, Jean |
author_sort |
Pichon, Jean-Jacques |
title |
Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
title_short |
Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
title_full |
Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
title_fullStr |
Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
title_full_unstemmed |
Stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
title_sort |
stable isotope ratios of foraminifera from last glacial-interglacial sediments of the southern high latitudes |
publisher |
PANGAEA |
publishDate |
1992 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.727840 https://doi.org/10.1594/PANGAEA.727840 |
op_coverage |
MEDIAN LATITUDE: -49.415000 * MEDIAN LONGITUDE: 62.300000 * SOUTH-BOUND LATITUDE: -55.008300 * WEST-BOUND LONGITUDE: 51.318300 * NORTH-BOUND LATITUDE: -43.821700 * EAST-BOUND LONGITUDE: 73.281700 * DATE/TIME START: 1984-01-01T00:00:00 * DATE/TIME END: 1984-01-01T00:00:00 |
long_lat |
ENVELOPE(51.318300,73.281700,-43.821700,-55.008300) |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
Supplement to: Pichon, Jean-Jacques; Labeyrie, Laurent D; Bareille, Gilles F; Labracherie, Monique; Duprat, Josette M; Jouzel, Jean (1992): Surface water temperature changesin the high latitudes of the southern hemisphere over the last glacial-interglacial cycle. Paleoceanography, 7(3), 289-318, https://doi.org/10.1029/92PA00709 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.727840 https://doi.org/10.1594/PANGAEA.727840 |
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.727840 https://doi.org/10.1029/92PA00709 |
_version_ |
1766163561367732224 |