Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean
Diatom assemblages from ODP Leg 177 sites 1093, 1094 and core PS2089-2, from the present Antarctic sea ice free zone and close to the Polar Front, were analyzed in order to reconstruct the climate development around the Mid-Brunhes Event 400 000 yr ago, as reflected by summer sea surface temperature...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.706201 2024-09-15T17:43:22+00:00 Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean Kunz-Pirrung, Martina Gersonde, Rainer Hodell, David A MEDIAN LATITUDE: -52.383389 * MEDIAN LONGITUDE: 5.414091 * SOUTH-BOUND LATITUDE: -53.188330 * WEST-BOUND LONGITUDE: 5.130100 * NORTH-BOUND LATITUDE: -49.976500 * EAST-BOUND LONGITUDE: 5.865500 * DATE/TIME START: 1991-04-08T14:59:00 * DATE/TIME END: 1998-01-22T12:10:00 2002 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.706201 https://doi.org/10.1594/PANGAEA.706201 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.706201 https://doi.org/10.1594/PANGAEA.706201 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Kunz-Pirrung, Martina; Gersonde, Rainer; Hodell, David A (2002): Mid-Brunhes century-scale diatom sea surface temperature and sea ice records from the Atlantic sector of the Southern Ocean (ODP Leg 177, sites 1093, 1094 and core PS2089-2). Palaeogeography, Palaeoclimatology, Palaeoecology, 182(3-4), 305-328, https://doi.org/10.1016/S0031-0182(01)00501-6 177-1093A 177-1093B 177-1094A 177-1094C 177-1094D ANT-IX/4 AWI_Paleo DRILL Drilling/drill rig Joides Resolution KL Leg177 Meteor Rise Ocean Drilling Program ODP Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS18 PS18/247 PS2089-2 South Atlantic Ocean dataset publication series 2002 ftpangaea https://doi.org/10.1594/PANGAEA.70620110.1016/S0031-0182(01)00501-6 2024-07-24T02:31:42Z Diatom assemblages from ODP Leg 177 sites 1093, 1094 and core PS2089-2, from the present Antarctic sea ice free zone and close to the Polar Front, were analyzed in order to reconstruct the climate development around the Mid-Brunhes Event 400 000 yr ago, as reflected by summer sea surface temperature (SSST) and sea ice distribution. Dense sample spacing allows a mean temporal resolution during Marine Isotope Stage (MIS) 11 (423-362 ka) of 300-400 yr. SSST values were estimated from diatom assemblages using a transfer function technique. The distribution pattern of sea ice diatoms indicates that the present-day ice free Antarctic Zone was seasonally covered by sea ice during the cold MIS 12 and MIS 10. These glacial periods are characterized by sea ice fluctuations with a periodicity of 3 and 1.85 kyr, suggesting the occurrence of Dansgaard-Oeschger-style millennial-scale oscillations in the Atlantic sector of the Southern Ocean during the glacial stages MIS 12 and MIS 10. Termination V (MIS 12/11) is characterized by a distinct temperature increase of 4-6°C, intersected especially at the southern site 1094 and core PS2089-2 by two distinct cooling events reminiscent of the Younger Dryas, which are associated with a northward shift of the winter sea ice edge in the Antarctic Zone. The SSST record is characterized by distinct temperature intervals bounded by stepwise, rapid changes. Maximum temperatures were reached during Termination V and the early MIS 11, exceeding modern values by 2°C over a period of 8 kyr. This pattern indicates a very early response of the Southern Ocean to global climate on Milankovitch-driven climate variability. The SSST optimum is marked by millennial-scale temperature oscillations with an amplitude of ca. 1°C and periodicities of ca. 1.85 and 1.47 kyr, probably reflecting changes in the ocean circulation system. The SSSTs during the MIS 11 temperature optimum do not exceed values obtained from other interglacial optima such as the early periods of MIS 5 or MIS 1 from the Antarctic Zone. ... Other/Unknown Material Antarc* Antarctic Sea ice South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(5.130100,5.865500,-49.976500,-53.188330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
177-1093A 177-1093B 177-1094A 177-1094C 177-1094D ANT-IX/4 AWI_Paleo DRILL Drilling/drill rig Joides Resolution KL Leg177 Meteor Rise Ocean Drilling Program ODP Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS18 PS18/247 PS2089-2 South Atlantic Ocean |
spellingShingle |
177-1093A 177-1093B 177-1094A 177-1094C 177-1094D ANT-IX/4 AWI_Paleo DRILL Drilling/drill rig Joides Resolution KL Leg177 Meteor Rise Ocean Drilling Program ODP Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS18 PS18/247 PS2089-2 South Atlantic Ocean Kunz-Pirrung, Martina Gersonde, Rainer Hodell, David A Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean |
topic_facet |
177-1093A 177-1093B 177-1094A 177-1094C 177-1094D ANT-IX/4 AWI_Paleo DRILL Drilling/drill rig Joides Resolution KL Leg177 Meteor Rise Ocean Drilling Program ODP Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS18 PS18/247 PS2089-2 South Atlantic Ocean |
description |
Diatom assemblages from ODP Leg 177 sites 1093, 1094 and core PS2089-2, from the present Antarctic sea ice free zone and close to the Polar Front, were analyzed in order to reconstruct the climate development around the Mid-Brunhes Event 400 000 yr ago, as reflected by summer sea surface temperature (SSST) and sea ice distribution. Dense sample spacing allows a mean temporal resolution during Marine Isotope Stage (MIS) 11 (423-362 ka) of 300-400 yr. SSST values were estimated from diatom assemblages using a transfer function technique. The distribution pattern of sea ice diatoms indicates that the present-day ice free Antarctic Zone was seasonally covered by sea ice during the cold MIS 12 and MIS 10. These glacial periods are characterized by sea ice fluctuations with a periodicity of 3 and 1.85 kyr, suggesting the occurrence of Dansgaard-Oeschger-style millennial-scale oscillations in the Atlantic sector of the Southern Ocean during the glacial stages MIS 12 and MIS 10. Termination V (MIS 12/11) is characterized by a distinct temperature increase of 4-6°C, intersected especially at the southern site 1094 and core PS2089-2 by two distinct cooling events reminiscent of the Younger Dryas, which are associated with a northward shift of the winter sea ice edge in the Antarctic Zone. The SSST record is characterized by distinct temperature intervals bounded by stepwise, rapid changes. Maximum temperatures were reached during Termination V and the early MIS 11, exceeding modern values by 2°C over a period of 8 kyr. This pattern indicates a very early response of the Southern Ocean to global climate on Milankovitch-driven climate variability. The SSST optimum is marked by millennial-scale temperature oscillations with an amplitude of ca. 1°C and periodicities of ca. 1.85 and 1.47 kyr, probably reflecting changes in the ocean circulation system. The SSSTs during the MIS 11 temperature optimum do not exceed values obtained from other interglacial optima such as the early periods of MIS 5 or MIS 1 from the Antarctic Zone. ... |
format |
Other/Unknown Material |
author |
Kunz-Pirrung, Martina Gersonde, Rainer Hodell, David A |
author_facet |
Kunz-Pirrung, Martina Gersonde, Rainer Hodell, David A |
author_sort |
Kunz-Pirrung, Martina |
title |
Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean |
title_short |
Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean |
title_full |
Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean |
title_fullStr |
Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean |
title_full_unstemmed |
Paleotemperature reconstructions of the Atlantic Sector of the Southern Ocean |
title_sort |
paleotemperature reconstructions of the atlantic sector of the southern ocean |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.706201 https://doi.org/10.1594/PANGAEA.706201 |
op_coverage |
MEDIAN LATITUDE: -52.383389 * MEDIAN LONGITUDE: 5.414091 * SOUTH-BOUND LATITUDE: -53.188330 * WEST-BOUND LONGITUDE: 5.130100 * NORTH-BOUND LATITUDE: -49.976500 * EAST-BOUND LONGITUDE: 5.865500 * DATE/TIME START: 1991-04-08T14:59:00 * DATE/TIME END: 1998-01-22T12:10:00 |
long_lat |
ENVELOPE(5.130100,5.865500,-49.976500,-53.188330) |
genre |
Antarc* Antarctic Sea ice South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Kunz-Pirrung, Martina; Gersonde, Rainer; Hodell, David A (2002): Mid-Brunhes century-scale diatom sea surface temperature and sea ice records from the Atlantic sector of the Southern Ocean (ODP Leg 177, sites 1093, 1094 and core PS2089-2). Palaeogeography, Palaeoclimatology, Palaeoecology, 182(3-4), 305-328, https://doi.org/10.1016/S0031-0182(01)00501-6 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.706201 https://doi.org/10.1594/PANGAEA.706201 |
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.70620110.1016/S0031-0182(01)00501-6 |
_version_ |
1810490327243423744 |