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...
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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 |