Nuernberg, Dirk et al. (2004): Paleo-export production, terrigenous flux and sea surface temperatures around Tasmania; implications for glacial/interglacial changes in the Subtropical Convergence Zone
Leg/Site/Hole:
Related Expeditions:
ODP 189
Identifier:
ID:
2005-035036
Type:
georefid
Creator:
Name:
Nuernberg, Dirk
Affiliation:
Geomar Research Center for Marine Geosciences, Kiel, Federal Republic of Germany
Role:
author
Name:
Brughmans, Natasja
Affiliation:
University of California at Santa Barbara, United States
Role:
author
Name:
Schoenfeld, Joachim
Affiliation:
Texas A&M University, United States
Role:
author
Name:
Ninnemann, Ulysses
Affiliation:
University of Bergen, Norway
Role:
author
Name:
Dullo, Christian
Affiliation:
Role:
author
Identification:
Title:
Paleo-export production, terrigenous flux and sea surface temperatures around Tasmania; implications for glacial/interglacial changes in the Subtropical Convergence Zone
Year:
2004
Source:
In: Exon, Neville F. (editor), Kennett, James P. (editor), Malone, Mitchell (editor), The Cenozoic Southern Ocean; tectonics, sedimentation, and climate change between Australia and Antarctica
Publisher:
American Geophysical Union, Washington, DC, United States
Volume:
151
Issue:
Pages:
291-318
Abstract:
The Tasmanian Gateway, focus of ODP Leg 189, is a key oceanographic area within the Southern Ocean. Our investigations concentrate on the last 500,000 years of sedimentation at Sites 1168 (western Tasmanian margin), 1170 and 1171 (Tasman Rise), and 1172 (East Tasman Plateau). A suite of geochemical proxy data reflecting paleo-export production, terrigenous flux, and sea surface temperature, constrain temporal and spatial variations in surface water masses and oceanographic frontal systems over these sites. Interglacial periods were commonly of low productivity and less affected by terrigenous matter supply, suggesting that the position of the Subtropical Convergence remained south of Tasman Rise. Only during early MIS 11 and MIS 9 over the southern Tasman Rise, and during MIS 7 over the northern Tasman Rise, did enhanced marine productivity, combined with an enhanced terrigenous flux, indicate waxing influence of subantarctic waters. During glacial MIS 2, marine productivity and terrigenous flux increased significantly at Sites 1168, 1170, and 1171 implying that the Subtropical Convergence moved northward to west of Tasmania. (modif. j. abstr.)
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:-42.3600 West:144.2400 East:
149.5600 South:-48.3000
Keywords: Stratigraphy; algae; Anomalinidae; Australasia; Australia; Buliminacea; C-13/C-12; Calcidiscus; Calcidiscus macintyrei; carbon; Cassidulinacea; Cenozoic; chronostratigraphy; Cibicidoides; Cibicidoides mundulus; Cibicidoides wuellerstorfi; Coccolithophoraceae; East Australian Current; East Tasman Plateau; Emiliania; Emiliania huxleyi; Foraminifera; glacial environment; Globigerina; Globigerina bulloides; Globigerinacea; Globigerinidae; Globorotalia; Globorotalia truncatulinoides; Globorotaliidae; icehouse effect; interglacial environment; Invertebrata; isotope ratios; isotopes; Leg 189; microfossils; nannofossils; nannoplankton; O-18/O-16; Ocean Drilling Program; ODP Site 1168; ODP Site 1170; ODP Site 1171; ODP Site 1172; oxygen; Pacific Ocean; paleo-oceanography; paleoclimatology; plankton; Plantae; productivity; Protista; Quaternary; Rotaliina; sea-surface temperature; sedimentation; South Pacific; South Tasman Rise; Southern Ocean; Southwest Pacific; stable isotopes; Subtropical Convergence Zone; Tasman Sea; Tasmania Australia; Tasmanian Gateway; terrigenous materials; Uvigerina; Uvigerina pygmea; Uvigerinidae; West Pacific;
.