Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand
High-resolution textural, carbonate, microfossil, and oxygen (delta18O) and carbon (delta13C) stable isotopic analyses are presented for the late Quaternary (isotopic stages 1 to 6) interval of a core at Deep Sea Drilling Project site 594, situated just south of the present Subtropical Convergence i...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.729015 2023-05-15T13:42:09+02:00 Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand Nelson, Campbell S Cooke, Penepole J Hendy, Chris H Cuthbertson, Alison M LATITUDE: -45.523500 * LONGITUDE: 174.948000 * DATE/TIME START: 1983-01-03T00:00:00 * DATE/TIME END: 1983-01-03T00:00:00 1993-11-09 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.729015 https://doi.org/10.1594/PANGAEA.729015 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.729015 https://doi.org/10.1594/PANGAEA.729015 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Nelson, Campbell S; Cooke, Penepole J; Hendy, Chris H; Cuthbertson, Alison M (1993): Oceanographic and climatic changes over the past 160,000 years at Deep Sea Drilling Project Site 594 off southwestern New Zealand, southwest Pacific Ocean. Paleoceanography, 8(4), 435-458, https://doi.org/10.1029/93PA01162 90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg90 South Pacific/CONT RISE Dataset 1993 ftpangaea https://doi.org/10.1594/PANGAEA.729015 https://doi.org/10.1029/93PA01162 2023-01-20T07:31:34Z High-resolution textural, carbonate, microfossil, and oxygen (delta18O) and carbon (delta13C) stable isotopic analyses are presented for the late Quaternary (isotopic stages 1 to 6) interval of a core at Deep Sea Drilling Project site 594, situated just south of the present Subtropical Convergence in northernmost Subantarctic surface waters on the southern flank of Chatham Rise in the southwest Pacific. Downcore alternations of pelagic and hemipelagic oozes correspond to interglacial and glacial episodes, respectively. Interglacial oozes contain a northern Subantarctic assemblage of planktonic foraminifera, with rare cool subtropical species, while glacial oozes are characterized by species typical of southern(most) Subantarctic waters and include radiolaria with affinity for Antarctic waters. The planktonic delta18O record for the site supports a 3°-6°C temperature change in near-surface waters between interglacial and glacial stages and indicates that during stage 5e, the near-surface waters were about 1°C warmer than at present. A pronounced cooling during stage 5d matches that of the Vostok ice core deltaD record, and negative excursions at the end of stages 2 and 6 support a southern latitude warming preceding northern hemisphere deglaciation. Benthic foraminifera typical of cold intermediate to deep waters can increase dramatically in abundance in the hemipelagic ooze intervals when delta18O results suggest a temperature drop in glacial stage bottom waters of 2°-4°C, possibly a result of upward displacement of Antarctic Intermediate Water by Circumpolar Deep Water at the site. The foraminiferal delta13C records support a reduced influence of North Atlantic Deep Water in the southwest Pacific during glacial stages, when nutrient enhancement occurred in both bottom and surface waters. Despite the pronounced changes between interglacial and glacial conditions inferred at site 594, contributed to by a substantial northward shift by at least 5° of latitude in the position of the Antarctic Convergence south of ... Dataset Antarc* Antarctic ice core North Atlantic Deep Water North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Antarctic New Zealand Pacific The Antarctic ENVELOPE(174.948000,174.948000,-45.523500,-45.523500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg90 South Pacific/CONT RISE |
spellingShingle |
90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg90 South Pacific/CONT RISE Nelson, Campbell S Cooke, Penepole J Hendy, Chris H Cuthbertson, Alison M Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand |
topic_facet |
90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg90 South Pacific/CONT RISE |
description |
High-resolution textural, carbonate, microfossil, and oxygen (delta18O) and carbon (delta13C) stable isotopic analyses are presented for the late Quaternary (isotopic stages 1 to 6) interval of a core at Deep Sea Drilling Project site 594, situated just south of the present Subtropical Convergence in northernmost Subantarctic surface waters on the southern flank of Chatham Rise in the southwest Pacific. Downcore alternations of pelagic and hemipelagic oozes correspond to interglacial and glacial episodes, respectively. Interglacial oozes contain a northern Subantarctic assemblage of planktonic foraminifera, with rare cool subtropical species, while glacial oozes are characterized by species typical of southern(most) Subantarctic waters and include radiolaria with affinity for Antarctic waters. The planktonic delta18O record for the site supports a 3°-6°C temperature change in near-surface waters between interglacial and glacial stages and indicates that during stage 5e, the near-surface waters were about 1°C warmer than at present. A pronounced cooling during stage 5d matches that of the Vostok ice core deltaD record, and negative excursions at the end of stages 2 and 6 support a southern latitude warming preceding northern hemisphere deglaciation. Benthic foraminifera typical of cold intermediate to deep waters can increase dramatically in abundance in the hemipelagic ooze intervals when delta18O results suggest a temperature drop in glacial stage bottom waters of 2°-4°C, possibly a result of upward displacement of Antarctic Intermediate Water by Circumpolar Deep Water at the site. The foraminiferal delta13C records support a reduced influence of North Atlantic Deep Water in the southwest Pacific during glacial stages, when nutrient enhancement occurred in both bottom and surface waters. Despite the pronounced changes between interglacial and glacial conditions inferred at site 594, contributed to by a substantial northward shift by at least 5° of latitude in the position of the Antarctic Convergence south of ... |
format |
Dataset |
author |
Nelson, Campbell S Cooke, Penepole J Hendy, Chris H Cuthbertson, Alison M |
author_facet |
Nelson, Campbell S Cooke, Penepole J Hendy, Chris H Cuthbertson, Alison M |
author_sort |
Nelson, Campbell S |
title |
Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand |
title_short |
Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand |
title_full |
Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand |
title_fullStr |
Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand |
title_full_unstemmed |
Microfossil abundances and stable isotope composition of foraminifera from DSDP Hole 90-594 off southeastern New Zealand |
title_sort |
microfossil abundances and stable isotope composition of foraminifera from dsdp hole 90-594 off southeastern new zealand |
publisher |
PANGAEA |
publishDate |
1993 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.729015 https://doi.org/10.1594/PANGAEA.729015 |
op_coverage |
LATITUDE: -45.523500 * LONGITUDE: 174.948000 * DATE/TIME START: 1983-01-03T00:00:00 * DATE/TIME END: 1983-01-03T00:00:00 |
long_lat |
ENVELOPE(174.948000,174.948000,-45.523500,-45.523500) |
geographic |
Antarctic New Zealand Pacific The Antarctic |
geographic_facet |
Antarctic New Zealand Pacific The Antarctic |
genre |
Antarc* Antarctic ice core North Atlantic Deep Water North Atlantic Planktonic foraminifera |
genre_facet |
Antarc* Antarctic ice core North Atlantic Deep Water North Atlantic Planktonic foraminifera |
op_source |
Supplement to: Nelson, Campbell S; Cooke, Penepole J; Hendy, Chris H; Cuthbertson, Alison M (1993): Oceanographic and climatic changes over the past 160,000 years at Deep Sea Drilling Project Site 594 off southwestern New Zealand, southwest Pacific Ocean. Paleoceanography, 8(4), 435-458, https://doi.org/10.1029/93PA01162 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.729015 https://doi.org/10.1594/PANGAEA.729015 |
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.729015 https://doi.org/10.1029/93PA01162 |
_version_ |
1766163621229887488 |