Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand
A series of cores from east of New Zealand have been examined to determine the paleoceanographic history of the late Quaternary in the SW Pacific using planktonic foraminiferal data. Distinct shifts of species can be seen between glacial and interglacial times especially south of Chatham Rise east o...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.691461 2023-05-15T18:01:00+02:00 Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand Weaver, Philip PE Carter, Lionel Neil, Helen L MEDIAN LATITUDE: -43.951750 * MEDIAN LONGITUDE: 176.719000 * SOUTH-BOUND LATITUDE: -45.523500 * WEST-BOUND LONGITUDE: 174.948000 * NORTH-BOUND LATITUDE: -42.380000 * EAST-BOUND LONGITUDE: 178.490000 * DATE/TIME START: 1983-01-03T00:00:00 * DATE/TIME END: 1983-01-03T00:00:00 1998-04-25 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.691461 https://doi.org/10.1594/PANGAEA.691461 en eng PANGAEA Weaver, Philip PE; Carter, Lionel; Neil, Helen L (1998): Response of surface water masses and circulation to Late Quaternary climate change east of New Zealand. Paleoceanography, 13(1), 70-83, https://doi.org/10.1029/97PA02982 https://doi.pangaea.de/10.1594/PANGAEA.691461 https://doi.org/10.1594/PANGAEA.691461 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY 90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GC Glomar Challenger Gravity corer Leg90 R657 South Pacific/CONT RISE Dataset 1998 ftpangaea https://doi.org/10.1594/PANGAEA.691461 https://doi.org/10.1029/97PA02982 2023-01-20T07:31:09Z A series of cores from east of New Zealand have been examined to determine the paleoceanographic history of the late Quaternary in the SW Pacific using planktonic foraminiferal data. Distinct shifts of species can be seen between glacial and interglacial times especially south of Chatham Rise east of South Island. Foraminiferal fragmentation ratios and benthic/planktonic foraminiferal ratios both show increased dissolution during glacials, especially isotope stage 2 to the south of Chatham Rise. The present-day Subtropical Convergence appears to be tied to the Chatham Rise at 44°S, but during glacial times this rise separated cold water to the south from much warmer water to the north, with an associated strong thermal gradient across the rise. We estimate that this gradient could have presented as much as an 8°C temperature change across 4°C of latitude during the maximum of the last ice age. There is only weak evidence of the Younger Dryas cool event, but there is a clear climatic optimum between 8 and 6.4 ka with temperatures 1°-2°C higher than the present day. The marine changes compare well with vegetational changes on both South and North Island. Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Pacific New Zealand ENVELOPE(174.948000,178.490000,-42.380000,-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 GC Glomar Challenger Gravity corer Leg90 R657 South Pacific/CONT RISE |
spellingShingle |
90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GC Glomar Challenger Gravity corer Leg90 R657 South Pacific/CONT RISE Weaver, Philip PE Carter, Lionel Neil, Helen L Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand |
topic_facet |
90-594 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GC Glomar Challenger Gravity corer Leg90 R657 South Pacific/CONT RISE |
description |
A series of cores from east of New Zealand have been examined to determine the paleoceanographic history of the late Quaternary in the SW Pacific using planktonic foraminiferal data. Distinct shifts of species can be seen between glacial and interglacial times especially south of Chatham Rise east of South Island. Foraminiferal fragmentation ratios and benthic/planktonic foraminiferal ratios both show increased dissolution during glacials, especially isotope stage 2 to the south of Chatham Rise. The present-day Subtropical Convergence appears to be tied to the Chatham Rise at 44°S, but during glacial times this rise separated cold water to the south from much warmer water to the north, with an associated strong thermal gradient across the rise. We estimate that this gradient could have presented as much as an 8°C temperature change across 4°C of latitude during the maximum of the last ice age. There is only weak evidence of the Younger Dryas cool event, but there is a clear climatic optimum between 8 and 6.4 ka with temperatures 1°-2°C higher than the present day. The marine changes compare well with vegetational changes on both South and North Island. |
format |
Dataset |
author |
Weaver, Philip PE Carter, Lionel Neil, Helen L |
author_facet |
Weaver, Philip PE Carter, Lionel Neil, Helen L |
author_sort |
Weaver, Philip PE |
title |
Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand |
title_short |
Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand |
title_full |
Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand |
title_fullStr |
Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand |
title_full_unstemmed |
Distribution of planktonic foraminifera in Quaternary sediments east of New Zealand |
title_sort |
distribution of planktonic foraminifera in quaternary sediments east of new zealand |
publisher |
PANGAEA |
publishDate |
1998 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.691461 https://doi.org/10.1594/PANGAEA.691461 |
op_coverage |
MEDIAN LATITUDE: -43.951750 * MEDIAN LONGITUDE: 176.719000 * SOUTH-BOUND LATITUDE: -45.523500 * WEST-BOUND LONGITUDE: 174.948000 * NORTH-BOUND LATITUDE: -42.380000 * EAST-BOUND LONGITUDE: 178.490000 * DATE/TIME START: 1983-01-03T00:00:00 * DATE/TIME END: 1983-01-03T00:00:00 |
long_lat |
ENVELOPE(174.948000,178.490000,-42.380000,-45.523500) |
geographic |
Pacific New Zealand |
geographic_facet |
Pacific New Zealand |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
Weaver, Philip PE; Carter, Lionel; Neil, Helen L (1998): Response of surface water masses and circulation to Late Quaternary climate change east of New Zealand. Paleoceanography, 13(1), 70-83, https://doi.org/10.1029/97PA02982 https://doi.pangaea.de/10.1594/PANGAEA.691461 https://doi.org/10.1594/PANGAEA.691461 |
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.691461 https://doi.org/10.1029/97PA02982 |
_version_ |
1766170309500600320 |