Climate variability of the Holocene, Site 1098, Palmer Deep, Antarctica

Online Access: Get full text
doi: 10.2973/odp.proc.sr.178.203.2001
Author(s): Osterman, Lisa E.; Poore, Richard Z.; Barron, John A.
Ocean Drilling Program, Leg 178, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
U. S. Geological Survey, Reston, VA, United States
Other:
Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Italy
Ocean Drilling Program, United States
University of Minnesota at Minneapolis, United States
Appalachian State University, United States
University of Melbourne, Australia
Hamilton College, United States
California State University at Hayward, United States
University of Leeds, United Kingdom
University of Toronto at Scarborough, Canada
University of Florida, United States
University of Leicester, United Kingdom
Istituto di Riceaca "Geomare Sud", Italy
Kochi University, Japan
University of California at Los Angeles, United States
Laboratoire de Mesures en Forage, France
Universidad de Granada, Spain
Christian-Albrechts-Universität zu Kiel, Federal Republic of Germany
U. S. Geological Survey, United States
Brown University, United States
Uppsala University, United States
Scripps Institution of Oceanography, United States
Volume Title: Proceedings of the Ocean Drilling Program, scientific results, Antarctic glacial history and sea-level change; covering Leg 178 of the cruises of the drilling vessel JOIDES Resolution; Punta Arenas, Chile, to Cape Town, South Africa; sites 1095-1103; 5 February-9 April 1998
Volume Author(s): Baker, Peter F., editor; Camerlenghi, Angelo; Acton, Gary D.; Brachfeld, Stefanie A.; Cowan, Ellen A.; Daniels, James; Domack, Eugene W.; Escutia, Carlota; Evans, Andrew J.; Eyles, Nicholas; Guyodo, Yohan J. B.; Hatfield, Kate L.; Iorio, Marina; Iwai, Masao; Kyte, Frank T.; Lauer, Christine; Maldonado, Andrés; Moerz, Tobias; Osterman, Lisa E.; Pudsey, Carol J.; Schuffert, Jeffrey D.; Sjunneskog, Charlotte M.; Weinheimer, Amy L.; Williams, Trevor; Winter, Diane M.; Wolf-Welling, Thomas C. W.; Ramsay, Anthony T. S.
Source: Proceedings of the Ocean Drilling Program, scientific results, Antarctic glacial history and sea-level change; covering Leg 178 of the cruises of the drilling vessel JOIDES Resolution; Punta Arenas, Chile, to Cape Town, South Africa; sites 1095-1103; 5 February-9 April 1998, Peter F. Baker, Angelo Camerlenghi, Gary D. Acton, Stefanie A. Brachfeld, Ellen A. Cowan, James Daniels, Eugene W. Domack, Carlota Escutia, Andrew J. Evans, Nicholas Eyles, Yohan J. B. Guyodo, Kate L. Hatfield, Marina Iorio, Masao Iwai, Frank T. Kyte, Christine Lauer, Andrés Maldonado, Tobias Moerz, Lisa E. Osterman, Carol J. Pudsey, Jeffrey D. Schuffert, Charlotte M. Sjunneskog, Amy L. Weinheimer, Trevor Williams, Diane M. Winter, Thomas C. W. Wolf-Welling and Anthony T. S. Ramsay; Ocean Drilling Program, Leg 178, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.178, 45p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Available only on CD-ROM in PDF format and on the Web in PDF or HTML; access date Feb. 24, 2002. 39 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; illus., incl. 12 tables, strat. col.
Summary: Detailed study of four Holocene sediment intervals from Ocean Drilling Program Site 1098 (Palmer Deep, Antarctic Peninsula) reveals that in situ dissolution of calcareous foraminifers in the core repository has significantly altered and in some cases eliminated calcareous foraminifers. Despite dissolution, the foraminifer and supporting diatom data show that the most open-ocean and reduced sea-ice conditions occurred in the early Holocene. The influence of Circumpolar Deep Water was greatest during the early Holocene but continued to be important throughout the Holocene. An increase in sea-ice proximal diatoms at 3500 cal. BP documents an expansion in the amount of persistent sea ice. The inferred increase in sea ice corresponds with an overall increase in magnetic susceptibility values. Benthic foraminifers are present in all samples from the Palmer Deep, including the middle Holocene pervasively laminated sediments with low magnetic susceptibility values. The consistent presence of mobile epifaunal benthic foraminifers in the laminated sediments demonstrates that the laminations do not represent anoxic conditions. The uniform composition of the agglutinated foraminifer fauna throughout the late Holocene suggests that the Palmer Deep did not experience bottom-water-mass changes associated with the alternating deposition of bioturbated or laminated sediments.
Year of Publication: 2002
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Algae; Antarctic Ocean; Antarctic Peninsula; Antarctica; Biostratigraphy; Cenozoic; Climate change; Cores; Diatoms; Foraminifera; Holocene; Ice; Invertebrata; Laminations; Leg 178; Magnetic susceptibility; Marine sediments; Microfossils; ODP Site 1098; Ocean Drilling Program; Ocean floors; Paleo-oceanography; Paleoclimatology; Paleomagnetism; Palmer Deep; Planar bedding structures; Plantae; Protista; Quaternary; Reconstruction; Sea ice; Sedimentary structures; Sediments; Variations
Coordinates: S645143 S645143 W0641228 W0641228
Record ID: 2003022402
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.