Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene
The relative percentages of diatom taxa in 5 deep-sea cores (DSDP 266, ODP 699A, ODP 747A. ODP 751A, and Eltanin Core 50-28) from the Southern Ocean are determined for an interval centered on 3.1 to 2.9 Ma in the middle part of the Pliocene. This climatically warm interval, which is being studied by...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.682280 2024-09-15T17:45:57+00:00 Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene Barron, John A MEDIAN LATITUDE: -56.676840 * MEDIAN LONGITUDE: 77.346100 * SOUTH-BOUND LATITUDE: -62.903000 * WEST-BOUND LONGITUDE: -30.677000 * NORTH-BOUND LATITUDE: -51.542000 * EAST-BOUND LONGITUDE: 150.687000 * DATE/TIME START: 1972-01-01T00:00:00 * DATE/TIME END: 1988-04-19T23:30:00 1996 application/zip, 15 datasets https://doi.pangaea.de/10.1594/PANGAEA.682280 https://doi.org/10.1594/PANGAEA.682280 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.682280 https://doi.org/10.1594/PANGAEA.682280 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Barron, John A (1996): Diatom constraints on the position of the Antarctic Polar Front in the middle part of the Pliocene. Marine Micropaleontology, 27(1-4), 195-213, https://doi.org/10.1016/0377-8398(95)00060-7 114-699A 120-747A 120-751A 28-266 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT50 ELT50.028-PC Eltanin Glomar Challenger Joides Resolution Leg114 Leg120 Leg28 Ocean Drilling Program ODP PC Piston corer South Atlantic Ocean South Indian Ridge South Indian Ocean dataset publication series 1996 ftpangaea https://doi.org/10.1594/PANGAEA.68228010.1016/0377-8398(95)00060-7 2024-07-24T02:31:42Z The relative percentages of diatom taxa in 5 deep-sea cores (DSDP 266, ODP 699A, ODP 747A. ODP 751A, and Eltanin Core 50-28) from the Southern Ocean are determined for an interval centered on 3.1 to 2.9 Ma in the middle part of the Pliocene. This climatically warm interval, which is being studied by the PRISM Project of the U.S. Geological Survey, coincides with a proposed interval of major deglaciation of East Antarctica. The maximum southerly position of the Antarctic Polar Front between 3.1 and 3.0 Ma is inferred from these diatom studies, the presence of calcareous nannofossils in the sediments, and sedimentologic and micropaleontologic information from the literature. It is suggested that the Antarctic Polar Front may have migrated by as much as 6° of latitude further to the south in the southeastern Atlantic and Indian Oceans during this Pliocene warm interval but probably lay close to its present day position in the southwest Atlantic and Drake Passage. Summer sea surface temperatures are inferred to have been no more than 3°-4°C warmer than present at latitudes between 55° and 60°. Other/Unknown Material Antarc* Antarctic Antarctic Ocean Antarctica Drake Passage East Antarctica South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-30.677000,150.687000,-51.542000,-62.903000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
114-699A 120-747A 120-751A 28-266 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT50 ELT50.028-PC Eltanin Glomar Challenger Joides Resolution Leg114 Leg120 Leg28 Ocean Drilling Program ODP PC Piston corer South Atlantic Ocean South Indian Ridge South Indian Ocean |
spellingShingle |
114-699A 120-747A 120-751A 28-266 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT50 ELT50.028-PC Eltanin Glomar Challenger Joides Resolution Leg114 Leg120 Leg28 Ocean Drilling Program ODP PC Piston corer South Atlantic Ocean South Indian Ridge South Indian Ocean Barron, John A Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene |
topic_facet |
114-699A 120-747A 120-751A 28-266 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT50 ELT50.028-PC Eltanin Glomar Challenger Joides Resolution Leg114 Leg120 Leg28 Ocean Drilling Program ODP PC Piston corer South Atlantic Ocean South Indian Ridge South Indian Ocean |
description |
The relative percentages of diatom taxa in 5 deep-sea cores (DSDP 266, ODP 699A, ODP 747A. ODP 751A, and Eltanin Core 50-28) from the Southern Ocean are determined for an interval centered on 3.1 to 2.9 Ma in the middle part of the Pliocene. This climatically warm interval, which is being studied by the PRISM Project of the U.S. Geological Survey, coincides with a proposed interval of major deglaciation of East Antarctica. The maximum southerly position of the Antarctic Polar Front between 3.1 and 3.0 Ma is inferred from these diatom studies, the presence of calcareous nannofossils in the sediments, and sedimentologic and micropaleontologic information from the literature. It is suggested that the Antarctic Polar Front may have migrated by as much as 6° of latitude further to the south in the southeastern Atlantic and Indian Oceans during this Pliocene warm interval but probably lay close to its present day position in the southwest Atlantic and Drake Passage. Summer sea surface temperatures are inferred to have been no more than 3°-4°C warmer than present at latitudes between 55° and 60°. |
format |
Other/Unknown Material |
author |
Barron, John A |
author_facet |
Barron, John A |
author_sort |
Barron, John A |
title |
Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene |
title_short |
Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene |
title_full |
Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene |
title_fullStr |
Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene |
title_full_unstemmed |
Diatom constrains on the position of the Antarctic Polar Front in the middle part of the Pliocene |
title_sort |
diatom constrains on the position of the antarctic polar front in the middle part of the pliocene |
publisher |
PANGAEA |
publishDate |
1996 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.682280 https://doi.org/10.1594/PANGAEA.682280 |
op_coverage |
MEDIAN LATITUDE: -56.676840 * MEDIAN LONGITUDE: 77.346100 * SOUTH-BOUND LATITUDE: -62.903000 * WEST-BOUND LONGITUDE: -30.677000 * NORTH-BOUND LATITUDE: -51.542000 * EAST-BOUND LONGITUDE: 150.687000 * DATE/TIME START: 1972-01-01T00:00:00 * DATE/TIME END: 1988-04-19T23:30:00 |
long_lat |
ENVELOPE(-30.677000,150.687000,-51.542000,-62.903000) |
genre |
Antarc* Antarctic Antarctic Ocean Antarctica Drake Passage East Antarctica South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean Antarctica Drake Passage East Antarctica South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Barron, John A (1996): Diatom constraints on the position of the Antarctic Polar Front in the middle part of the Pliocene. Marine Micropaleontology, 27(1-4), 195-213, https://doi.org/10.1016/0377-8398(95)00060-7 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.682280 https://doi.org/10.1594/PANGAEA.682280 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.68228010.1016/0377-8398(95)00060-7 |
_version_ |
1810493889418625024 |