Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast

Planktic foraminiferal assemblages were used to investigate the paleoceanography of the Eastern Tasman Sea over the last 480 kyrs (Marine Isotope Stages 12-1). One hundred and sixty-two faunas (96 picked and identified as part of this project (MIS 12-6) added to 66 census counts from Dr. M. Crundwel...

Full description

Bibliographic Details
Main Author: Kolodziej, Andrew Peter
Format: Thesis
Language:unknown
Published: 2010
Subjects:
Online Access:https://doi.org/10.26686/wgtn.16985332.v1
https://figshare.com/articles/thesis/Planktic_Foraminifera-Based_Sea_Surface_Temperature_Estimates_and_Late_Quaternary_Oceanography_off_New_Zealand_s_West_Coast/16985332
id ftvictoriauwfig:oai:figshare.com:article/16985332
record_format openpolar
spelling ftvictoriauwfig:oai:figshare.com:article/16985332 2023-05-15T17:15:00+02:00 Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast Kolodziej, Andrew Peter 2010-01-01T00:00:00Z https://doi.org/10.26686/wgtn.16985332.v1 https://figshare.com/articles/thesis/Planktic_Foraminifera-Based_Sea_Surface_Temperature_Estimates_and_Late_Quaternary_Oceanography_off_New_Zealand_s_West_Coast/16985332 unknown doi:10.26686/wgtn.16985332.v1 https://figshare.com/articles/thesis/Planktic_Foraminifera-Based_Sea_Surface_Temperature_Estimates_and_Late_Quaternary_Oceanography_off_New_Zealand_s_West_Coast/16985332 Author Retains Copyright Earth Sciences not elsewhere classified Temperature Sea surface Micropaleontology School: School of Geography Environment and Earth Sciences 049999 Earth Sciences not elsewhere classified Marsden: 260112 Palaeontology Degree Discipline: Geology Degree Level: Masters Degree Name: Master of Science Text Thesis 2010 ftvictoriauwfig https://doi.org/10.26686/wgtn.16985332.v1 2021-11-11T00:02:35Z Planktic foraminiferal assemblages were used to investigate the paleoceanography of the Eastern Tasman Sea over the last 480 kyrs (Marine Isotope Stages 12-1). One hundred and sixty-two faunas (96 picked and identified as part of this project (MIS 12-6) added to 66 census counts from Dr. M. Crundwell (MIS 6-1)) have been assembled from Marion Dufresne piston core MD06-2986 (~43˚ S. off New Zealand‟s west coast, 1477 m water depth). Faunal changes through the last five glacial-interglacial cycles are used to track surface water mass movement. Glacial periods are dominated by the eutrophic species Globigerina bulloides, with significant contributions from the temperate species Globoconella inflata. Temperate species Neogloboquadrina incompta and Gc. inflata dominate interglacials, with the former dominating the warmer parts and the latter dominating the cooler parts of the interglacials. Modern Analogue Technique (MAT) and an Artificial Neural Network (ANN) were used to estimate past sea surface temperatures (SST) based on the foraminiferal census counts data (23 species, ~46,000 specimens). SSTs show that MIS 12 was the longest, sustained cold period, while the coldest temperature was recorded in MIS 5d (~8º C). Interglacials MIS 11 and 5e are the two warmest stages of the record, with SSTs reaching ~18.5º C, about ~2º C warmer than present day. We find that contrary to either the western Tasman Sea or offshore eastern New Zealand, the eastern Tasman Sea has been fairly isolated from any major influx of subpolar or subtropical species carried in with surface water from either high or low latitude sources. Subtropical taxa abundance (Globigerinoides ruber, Neogloboquadrina dutertrei (D), Globigerinoides sacculifer, Globigerinella aequilateralis, Sphaeroidinellopsis dehiscens, Truncorotalia truncatulinoides (D), Beella digitata) is low (average ~0.6%) and only prominent during peak interglacials. Subantarctic taxa abundance (Neogloboquadrina pachyderma, Neogloboquadrina dutertrei (S)) is low (average ~5.1%), but ... Thesis Neogloboquadrina pachyderma Open Access Victoria University of Wellington / Te Herenga Waka Marsden ENVELOPE(66.067,66.067,-67.867,-67.867) New Zealand
institution Open Polar
collection Open Access Victoria University of Wellington / Te Herenga Waka
op_collection_id ftvictoriauwfig
language unknown
topic Earth Sciences not elsewhere classified
Temperature
Sea surface
Micropaleontology
School: School of Geography
Environment and Earth Sciences
049999 Earth Sciences not elsewhere classified
Marsden: 260112 Palaeontology
Degree Discipline: Geology
Degree Level: Masters
Degree Name: Master of Science
spellingShingle Earth Sciences not elsewhere classified
Temperature
Sea surface
Micropaleontology
School: School of Geography
Environment and Earth Sciences
049999 Earth Sciences not elsewhere classified
Marsden: 260112 Palaeontology
Degree Discipline: Geology
Degree Level: Masters
Degree Name: Master of Science
Kolodziej, Andrew Peter
Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast
topic_facet Earth Sciences not elsewhere classified
Temperature
Sea surface
Micropaleontology
School: School of Geography
Environment and Earth Sciences
049999 Earth Sciences not elsewhere classified
Marsden: 260112 Palaeontology
Degree Discipline: Geology
Degree Level: Masters
Degree Name: Master of Science
description Planktic foraminiferal assemblages were used to investigate the paleoceanography of the Eastern Tasman Sea over the last 480 kyrs (Marine Isotope Stages 12-1). One hundred and sixty-two faunas (96 picked and identified as part of this project (MIS 12-6) added to 66 census counts from Dr. M. Crundwell (MIS 6-1)) have been assembled from Marion Dufresne piston core MD06-2986 (~43˚ S. off New Zealand‟s west coast, 1477 m water depth). Faunal changes through the last five glacial-interglacial cycles are used to track surface water mass movement. Glacial periods are dominated by the eutrophic species Globigerina bulloides, with significant contributions from the temperate species Globoconella inflata. Temperate species Neogloboquadrina incompta and Gc. inflata dominate interglacials, with the former dominating the warmer parts and the latter dominating the cooler parts of the interglacials. Modern Analogue Technique (MAT) and an Artificial Neural Network (ANN) were used to estimate past sea surface temperatures (SST) based on the foraminiferal census counts data (23 species, ~46,000 specimens). SSTs show that MIS 12 was the longest, sustained cold period, while the coldest temperature was recorded in MIS 5d (~8º C). Interglacials MIS 11 and 5e are the two warmest stages of the record, with SSTs reaching ~18.5º C, about ~2º C warmer than present day. We find that contrary to either the western Tasman Sea or offshore eastern New Zealand, the eastern Tasman Sea has been fairly isolated from any major influx of subpolar or subtropical species carried in with surface water from either high or low latitude sources. Subtropical taxa abundance (Globigerinoides ruber, Neogloboquadrina dutertrei (D), Globigerinoides sacculifer, Globigerinella aequilateralis, Sphaeroidinellopsis dehiscens, Truncorotalia truncatulinoides (D), Beella digitata) is low (average ~0.6%) and only prominent during peak interglacials. Subantarctic taxa abundance (Neogloboquadrina pachyderma, Neogloboquadrina dutertrei (S)) is low (average ~5.1%), but ...
format Thesis
author Kolodziej, Andrew Peter
author_facet Kolodziej, Andrew Peter
author_sort Kolodziej, Andrew Peter
title Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast
title_short Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast
title_full Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast
title_fullStr Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast
title_full_unstemmed Planktic Foraminifera-Based Sea Surface Temperature Estimates and Late Quaternary Oceanography off New Zealand's West Coast
title_sort planktic foraminifera-based sea surface temperature estimates and late quaternary oceanography off new zealand's west coast
publishDate 2010
url https://doi.org/10.26686/wgtn.16985332.v1
https://figshare.com/articles/thesis/Planktic_Foraminifera-Based_Sea_Surface_Temperature_Estimates_and_Late_Quaternary_Oceanography_off_New_Zealand_s_West_Coast/16985332
long_lat ENVELOPE(66.067,66.067,-67.867,-67.867)
geographic Marsden
New Zealand
geographic_facet Marsden
New Zealand
genre Neogloboquadrina pachyderma
genre_facet Neogloboquadrina pachyderma
op_relation doi:10.26686/wgtn.16985332.v1
https://figshare.com/articles/thesis/Planktic_Foraminifera-Based_Sea_Surface_Temperature_Estimates_and_Late_Quaternary_Oceanography_off_New_Zealand_s_West_Coast/16985332
op_rights Author Retains Copyright
op_doi https://doi.org/10.26686/wgtn.16985332.v1
_version_ 1766073145531301888