Glacial/Interglacial Export Production in the Subantarctic South Pacific
Atmospheric CO2 varied considerably in the past; however, the mechanisms that drive this variability are poorly understood. CO2 is linked to marine primary productivity through the biological carbon pump (BCP), leading to hypotheses that past increases in BCP efficiency in areas such as the Southern...
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ftindianastauniv:oai:scholars.indstate.edu:10484/972 2024-06-09T07:49:45+00:00 Glacial/Interglacial Export Production in the Subantarctic South Pacific Adamic, Jessica 2010 http://hdl.handle.net/10484/972 en_US eng http://hdl.handle.net/10484/972 Primary productivity (Biology) Oceania Geochemistry Export production South Pacific Phosphorus geochemistry Thesis 2010 ftindianastauniv 2024-05-16T08:40:02Z Atmospheric CO2 varied considerably in the past; however, the mechanisms that drive this variability are poorly understood. CO2 is linked to marine primary productivity through the biological carbon pump (BCP), leading to hypotheses that past increases in BCP efficiency in areas such as the Southern Ocean may have contributed to glacial CO2 drawdown (Sarmiento & Toggweiler, 1984). Productivity has varied considerably in the past, but the extent, timing, and impacts remain poorly understood. The Subantarctic South Pacific is an area of the ocean that is crucial to the understanding of both glacial climate and paleo-export productivity. Unfortunately, few studies have investigated the central South Pacific because it is so remote. The sediment core MV0502-04JC was recovered from the Subantarctic South Pacific in February-March 2005 at 50°S. The results of this study will be compared with data from ODP Leg 189, Site 1171, also in the Subantarctic South Pacific. Data from these cores will be used to evaluate glacial/interglacial paleo-export production and terrigenous provenance using bulk sediment geochemical proxies, including detailed P geochemistry, P, Ba, and metal elemental ratios, and Baxs. The results of this research suggest each site has variable terrigenous provenance that may have relatively different Fe content. Export production at MV0502-4JC is invariant down core; however, Site 1171 does exhibit glacial/interglacial variations in export production. Jessica Adamic Latimer, Jennifer Sandra Brake James Speer Master of Science Department of Earth and Environmental Science Cunningham Memorial library, Terre Haute,Indiana State University GS071610-201001 Masters Title from document title page. Document formatted into pages: contains 60 p.: ill. Includes abstract and appendix. Thesis Southern Ocean Sycamore Scholars at Indiana State University Pacific Sarmiento ENVELOPE(-68.000,-68.000,-72.000,-72.000) Southern Ocean |
institution |
Open Polar |
collection |
Sycamore Scholars at Indiana State University |
op_collection_id |
ftindianastauniv |
language |
English |
topic |
Primary productivity (Biology) Oceania Geochemistry Export production South Pacific Phosphorus geochemistry |
spellingShingle |
Primary productivity (Biology) Oceania Geochemistry Export production South Pacific Phosphorus geochemistry Adamic, Jessica Glacial/Interglacial Export Production in the Subantarctic South Pacific |
topic_facet |
Primary productivity (Biology) Oceania Geochemistry Export production South Pacific Phosphorus geochemistry |
description |
Atmospheric CO2 varied considerably in the past; however, the mechanisms that drive this variability are poorly understood. CO2 is linked to marine primary productivity through the biological carbon pump (BCP), leading to hypotheses that past increases in BCP efficiency in areas such as the Southern Ocean may have contributed to glacial CO2 drawdown (Sarmiento & Toggweiler, 1984). Productivity has varied considerably in the past, but the extent, timing, and impacts remain poorly understood. The Subantarctic South Pacific is an area of the ocean that is crucial to the understanding of both glacial climate and paleo-export productivity. Unfortunately, few studies have investigated the central South Pacific because it is so remote. The sediment core MV0502-04JC was recovered from the Subantarctic South Pacific in February-March 2005 at 50°S. The results of this study will be compared with data from ODP Leg 189, Site 1171, also in the Subantarctic South Pacific. Data from these cores will be used to evaluate glacial/interglacial paleo-export production and terrigenous provenance using bulk sediment geochemical proxies, including detailed P geochemistry, P, Ba, and metal elemental ratios, and Baxs. The results of this research suggest each site has variable terrigenous provenance that may have relatively different Fe content. Export production at MV0502-4JC is invariant down core; however, Site 1171 does exhibit glacial/interglacial variations in export production. Jessica Adamic Latimer, Jennifer Sandra Brake James Speer Master of Science Department of Earth and Environmental Science Cunningham Memorial library, Terre Haute,Indiana State University GS071610-201001 Masters Title from document title page. Document formatted into pages: contains 60 p.: ill. Includes abstract and appendix. |
format |
Thesis |
author |
Adamic, Jessica |
author_facet |
Adamic, Jessica |
author_sort |
Adamic, Jessica |
title |
Glacial/Interglacial Export Production in the Subantarctic South Pacific |
title_short |
Glacial/Interglacial Export Production in the Subantarctic South Pacific |
title_full |
Glacial/Interglacial Export Production in the Subantarctic South Pacific |
title_fullStr |
Glacial/Interglacial Export Production in the Subantarctic South Pacific |
title_full_unstemmed |
Glacial/Interglacial Export Production in the Subantarctic South Pacific |
title_sort |
glacial/interglacial export production in the subantarctic south pacific |
publishDate |
2010 |
url |
http://hdl.handle.net/10484/972 |
long_lat |
ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
geographic |
Pacific Sarmiento Southern Ocean |
geographic_facet |
Pacific Sarmiento Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://hdl.handle.net/10484/972 |
_version_ |
1801382552827592704 |