Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica
Combined high-resolution Holocene δ30Sidiat and δ13Cdiat paleorecords are presented from theSeasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatomsduring the Hypsithermal period (circa 7800 to 3500 calendar years (cal years) B.P.), coincident wi...
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American Geophysical Union
2014
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Online Access: | https://doi.org/10.1002/2014PA002609 https://nottingham-repository.worktribe.com/file/728653/1/Panizzo_et_al-2014-Paleoceanography.pdf https://nottingham-repository.worktribe.com/output/728653 |
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ftunnottinghamrr:oai:nottingham-repository.worktribe.com:728653 2023-05-15T13:42:39+02:00 Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica Panizzo, Virginia Crespin, Julien Crosta, Xavier Shemesh, Aldo Masse, Guillaume Yam, Ruth Mattielli, Nadine Cardinal, Damien 2014-04-22 https://doi.org/10.1002/2014PA002609 https://nottingham-repository.worktribe.com/file/728653/1/Panizzo_et_al-2014-Paleoceanography.pdf https://nottingham-repository.worktribe.com/output/728653 unknown American Geophysical Union https://nottingham-repository.worktribe.com/output/728653 Paleoceanography Volume 29 Issue 4 doi:https://doi.org/10.1002/2014PA002609 https://nottingham-repository.worktribe.com/file/728653/1/Panizzo_et_al-2014-Paleoceanography.pdf 0883-8305 doi:10.1002/2014PA002609 openAccess Journal Article 2014 ftunnottinghamrr https://doi.org/10.1002/2014PA002609 2022-10-13T22:08:10Z Combined high-resolution Holocene δ30Sidiat and δ13Cdiat paleorecords are presented from theSeasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatomsduring the Hypsithermal period (circa 7800 to 3500 calendar years (cal years) B.P.), coincident with a higherabundance of open water diatom species (Fragilariopsis kerguelensis), increased biogenic silica productivity(%BSi), and higher regional summer temperatures. The Neoglacial period (after circa 3500 cal years B.P.) isreflected by an increase in sea ice indicative species (Fragilariopsis curta and Fragilariopsis cylindrus,upto50%) along with a decrease in %BSi and δ13Cdiat(< 18‰ to 23‰). However, over this period, δ30Sidiatdata show an increasing trend, to some of the highest values in the Holocene record (average of +0.43‰).Competing hypotheses are discussed to account for the decoupling trend in utilization proxies including ironfertilization, species-dependent fractionation effects, and diatom habitats. Based on mass balance calculations,we highlight that diatom species derived from the semi-enclosed sea ice environment may have a confoundingeffect upon δ30Sidowncorecompositions of the seasonal sea ice zone. A diatom composition, with approximately28% of biogenic silica derived from the sea ice environment (diat-SI) can account for the increased averagecompo sition of δ30Sidiatduring the Neoglacial. These data highlight the significant role sea ice diatoms can playwith relation to their export in sediment records, which has implications on productivity reconstructions fromthe seasonal ice zone. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice University of Nottingham: Repository@Nottingham East Antarctica Paleoceanography 29 4 328 343 |
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Open Polar |
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University of Nottingham: Repository@Nottingham |
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ftunnottinghamrr |
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unknown |
description |
Combined high-resolution Holocene δ30Sidiat and δ13Cdiat paleorecords are presented from theSeasonal Ice Zone, East Antarctica. Both data sets reflect periods of increased nutrient utilization by diatomsduring the Hypsithermal period (circa 7800 to 3500 calendar years (cal years) B.P.), coincident with a higherabundance of open water diatom species (Fragilariopsis kerguelensis), increased biogenic silica productivity(%BSi), and higher regional summer temperatures. The Neoglacial period (after circa 3500 cal years B.P.) isreflected by an increase in sea ice indicative species (Fragilariopsis curta and Fragilariopsis cylindrus,upto50%) along with a decrease in %BSi and δ13Cdiat(< 18‰ to 23‰). However, over this period, δ30Sidiatdata show an increasing trend, to some of the highest values in the Holocene record (average of +0.43‰).Competing hypotheses are discussed to account for the decoupling trend in utilization proxies including ironfertilization, species-dependent fractionation effects, and diatom habitats. Based on mass balance calculations,we highlight that diatom species derived from the semi-enclosed sea ice environment may have a confoundingeffect upon δ30Sidowncorecompositions of the seasonal sea ice zone. A diatom composition, with approximately28% of biogenic silica derived from the sea ice environment (diat-SI) can account for the increased averagecompo sition of δ30Sidiatduring the Neoglacial. These data highlight the significant role sea ice diatoms can playwith relation to their export in sediment records, which has implications on productivity reconstructions fromthe seasonal ice zone. |
format |
Article in Journal/Newspaper |
author |
Panizzo, Virginia Crespin, Julien Crosta, Xavier Shemesh, Aldo Masse, Guillaume Yam, Ruth Mattielli, Nadine Cardinal, Damien |
spellingShingle |
Panizzo, Virginia Crespin, Julien Crosta, Xavier Shemesh, Aldo Masse, Guillaume Yam, Ruth Mattielli, Nadine Cardinal, Damien Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
author_facet |
Panizzo, Virginia Crespin, Julien Crosta, Xavier Shemesh, Aldo Masse, Guillaume Yam, Ruth Mattielli, Nadine Cardinal, Damien |
author_sort |
Panizzo, Virginia |
title |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_short |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_full |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_fullStr |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_full_unstemmed |
Sea ice diatom contributions to Holocene nutrient utilization in East Antarctica |
title_sort |
sea ice diatom contributions to holocene nutrient utilization in east antarctica |
publisher |
American Geophysical Union |
publishDate |
2014 |
url |
https://doi.org/10.1002/2014PA002609 https://nottingham-repository.worktribe.com/file/728653/1/Panizzo_et_al-2014-Paleoceanography.pdf https://nottingham-repository.worktribe.com/output/728653 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice |
op_relation |
https://nottingham-repository.worktribe.com/output/728653 Paleoceanography Volume 29 Issue 4 doi:https://doi.org/10.1002/2014PA002609 https://nottingham-repository.worktribe.com/file/728653/1/Panizzo_et_al-2014-Paleoceanography.pdf 0883-8305 doi:10.1002/2014PA002609 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1002/2014PA002609 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
4 |
container_start_page |
328 |
op_container_end_page |
343 |
_version_ |
1766170423945330688 |