Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach
Mineral dust is transported in the atmosphere and deposited in oceans, ice sheets and the terrestrial biosphere. Temporal changes in locations of dust source areas and transport pathways have implications for global climate and biogeochemical cycles. The chemical and physical characterization of the...
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Online Access: | https://hdl.handle.net/11590/468668 https://doi.org/10.1016/j.quascirev.2017.03.011 |
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ftunivroma3iris:oai:iris.uniroma3.it:11590/468668 2024-04-28T08:02:40+00:00 Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach Aarons, Sarah M. Aciego, Sarah M. Arendt, Carli A. Blakowski, Molly A. Steigmeyer, August Gabrielli, Paolo Sierra-Hernández, M. Roxana Beaudon, Emilie Delmonte, Barbara Baccolo, Giovanni May, Nathaniel W. Pratt, Kerri A. Aarons, Sarah M. Aciego, Sarah M. Arendt, Carli A. Blakowski, Molly A. Steigmeyer, August Gabrielli, Paolo Sierra-Hernández, M. Roxana Beaudon, Emilie Delmonte, Barbara Baccolo, Giovanni May, Nathaniel W. Pratt, Kerri A. 2017 https://hdl.handle.net/11590/468668 https://doi.org/10.1016/j.quascirev.2017.03.011 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000399849900005 volume:162 firstpage:60 lastpage:71 numberofpages:12 journal:QUATERNARY SCIENCE REVIEWS https://hdl.handle.net/11590/468668 doi:10.1016/j.quascirev.2017.03.011 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85014903231 Holocene Pleistocene Climate dynamic Paleoclimatology Antarctica Ice core Radiogenic isotope Dust info:eu-repo/semantics/article 2017 ftunivroma3iris https://doi.org/10.1016/j.quascirev.2017.03.011 2024-04-02T16:59:54Z Mineral dust is transported in the atmosphere and deposited in oceans, ice sheets and the terrestrial biosphere. Temporal changes in locations of dust source areas and transport pathways have implications for global climate and biogeochemical cycles. The chemical and physical characterization of the dust record preserved in ice cores is useful for identifying of dust source regions, dust transport, dominant wind direction and storm trajectories. Here, we present a 50,000-year geochemical characterization of mineral dust entrapped in a horizontal ice core from the Taylor Glacier in East Antarctica. Strontium (Sr) and neodymium (Nd) isotopes, grain size distribution, trace and rare earth element (REE) concentrations, and inorganic ion (Cl- and Na+) concentrations were measured in 38 samples, corresponding to a time interval from similar to 46 kyr before present (BP) to present. The Sr and Nd isotope compositions of insoluble dust in the Taylor Glacier ice shows distinct changes between the Last Glacial Period (LGP in this study ranging from similar to 46.7-15.3 kyr BP) the early Holocene (in this study ranging from 14.5-8.7 kyr BP), and zero-age samples. The 87Sr/86Sr isotopic composition of dust in the Taylor Glacier ice ranged from 0.708 to 0.711 during the LGP, while the variability during the early Holocene is higher ranging from 0.707 to 0.714. The eNd composition ranges from 0.1 to 3.9 during the LGP, and is more variable from 1.9 to -8.2 during the early Holocene. The increased isotopic variability during the early Holocene suggests a shift in dust provenance coinciding with the major climate transition from the LGP to the Holocene. The isotopic composition and multiple physical and chemical constraints support previous work attributing Southern South America (SSA) as the main dust source to East Antarctica during the LGP, and a combination of both local Ross Sea Sector dust sources and SSA after the transition into the Holocene. This study provides the first high time resolution data showing variations in ... Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Ross Sea Taylor Glacier Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) Quaternary Science Reviews 162 60 71 |
institution |
Open Polar |
collection |
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre) |
op_collection_id |
ftunivroma3iris |
language |
English |
topic |
Holocene Pleistocene Climate dynamic Paleoclimatology Antarctica Ice core Radiogenic isotope Dust |
spellingShingle |
Holocene Pleistocene Climate dynamic Paleoclimatology Antarctica Ice core Radiogenic isotope Dust Aarons, Sarah M. Aciego, Sarah M. Arendt, Carli A. Blakowski, Molly A. Steigmeyer, August Gabrielli, Paolo Sierra-Hernández, M. Roxana Beaudon, Emilie Delmonte, Barbara Baccolo, Giovanni May, Nathaniel W. Pratt, Kerri A. Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach |
topic_facet |
Holocene Pleistocene Climate dynamic Paleoclimatology Antarctica Ice core Radiogenic isotope Dust |
description |
Mineral dust is transported in the atmosphere and deposited in oceans, ice sheets and the terrestrial biosphere. Temporal changes in locations of dust source areas and transport pathways have implications for global climate and biogeochemical cycles. The chemical and physical characterization of the dust record preserved in ice cores is useful for identifying of dust source regions, dust transport, dominant wind direction and storm trajectories. Here, we present a 50,000-year geochemical characterization of mineral dust entrapped in a horizontal ice core from the Taylor Glacier in East Antarctica. Strontium (Sr) and neodymium (Nd) isotopes, grain size distribution, trace and rare earth element (REE) concentrations, and inorganic ion (Cl- and Na+) concentrations were measured in 38 samples, corresponding to a time interval from similar to 46 kyr before present (BP) to present. The Sr and Nd isotope compositions of insoluble dust in the Taylor Glacier ice shows distinct changes between the Last Glacial Period (LGP in this study ranging from similar to 46.7-15.3 kyr BP) the early Holocene (in this study ranging from 14.5-8.7 kyr BP), and zero-age samples. The 87Sr/86Sr isotopic composition of dust in the Taylor Glacier ice ranged from 0.708 to 0.711 during the LGP, while the variability during the early Holocene is higher ranging from 0.707 to 0.714. The eNd composition ranges from 0.1 to 3.9 during the LGP, and is more variable from 1.9 to -8.2 during the early Holocene. The increased isotopic variability during the early Holocene suggests a shift in dust provenance coinciding with the major climate transition from the LGP to the Holocene. The isotopic composition and multiple physical and chemical constraints support previous work attributing Southern South America (SSA) as the main dust source to East Antarctica during the LGP, and a combination of both local Ross Sea Sector dust sources and SSA after the transition into the Holocene. This study provides the first high time resolution data showing variations in ... |
author2 |
Aarons, Sarah M. Aciego, Sarah M. Arendt, Carli A. Blakowski, Molly A. Steigmeyer, August Gabrielli, Paolo Sierra-Hernández, M. Roxana Beaudon, Emilie Delmonte, Barbara Baccolo, Giovanni May, Nathaniel W. Pratt, Kerri A. |
format |
Article in Journal/Newspaper |
author |
Aarons, Sarah M. Aciego, Sarah M. Arendt, Carli A. Blakowski, Molly A. Steigmeyer, August Gabrielli, Paolo Sierra-Hernández, M. Roxana Beaudon, Emilie Delmonte, Barbara Baccolo, Giovanni May, Nathaniel W. Pratt, Kerri A. |
author_facet |
Aarons, Sarah M. Aciego, Sarah M. Arendt, Carli A. Blakowski, Molly A. Steigmeyer, August Gabrielli, Paolo Sierra-Hernández, M. Roxana Beaudon, Emilie Delmonte, Barbara Baccolo, Giovanni May, Nathaniel W. Pratt, Kerri A. |
author_sort |
Aarons, Sarah M. |
title |
Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach |
title_short |
Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach |
title_full |
Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach |
title_fullStr |
Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach |
title_full_unstemmed |
Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach |
title_sort |
dust composition changes from taylor glacier (east antarctica) during the last glacial-interglacial transition: a multi-proxy approach |
publishDate |
2017 |
url |
https://hdl.handle.net/11590/468668 https://doi.org/10.1016/j.quascirev.2017.03.011 |
genre |
Antarc* Antarctica East Antarctica ice core Ross Sea Taylor Glacier |
genre_facet |
Antarc* Antarctica East Antarctica ice core Ross Sea Taylor Glacier |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000399849900005 volume:162 firstpage:60 lastpage:71 numberofpages:12 journal:QUATERNARY SCIENCE REVIEWS https://hdl.handle.net/11590/468668 doi:10.1016/j.quascirev.2017.03.011 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85014903231 |
op_doi |
https://doi.org/10.1016/j.quascirev.2017.03.011 |
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Quaternary Science Reviews |
container_volume |
162 |
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60 |
op_container_end_page |
71 |
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1797573955865804800 |