Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2
We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 S, 94 55 E) ice core, central East Antarctica, during Marine Isotope Stage (MIS) 2. We address the question whether such changes reflect variable transport pathways from a unique so...
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ftnrm:oai:DiVA.org:nrm-2398 2023-05-15T14:05:22+02:00 Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 Delmonte, B Paleari, C. I. Andò, S Garzantini, E Andersson, Per Sune Petit, J.R. Crosta, X Narcisi, B Baroni, C Salvatore, M.C. Baccolo, G. Maggi, Valter 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2398 https://doi.org/10.1016/j.quascirev.2017.05.009 eng eng Enheten för geovetenskap University Milano-Bicocca, Milano, Italy University of Grenobles, Grenoble, France Unversity of Bordeaux, St Hilaire, France ENEA, Rome, Italy University of Pisa, Pisa, Italy Quaternary Science Reviews, 0277-3791, 2017, 168, s. 55-68 info:eu-repo/grantAgreement/EC/FP7/SE-TAF-5636 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2398 doi:10.1016/j.quascirev.2017.05.009 info:eu-repo/semantics/openAccess Antarctic ice cores dust Sr and Nd isotopes Climate Research Klimatforskning Article in journal info:eu-repo/semantics/article text 2017 ftnrm https://doi.org/10.1016/j.quascirev.2017.05.009 2021-10-08T07:21:13Z We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 S, 94 55 E) ice core, central East Antarctica, during Marine Isotope Stage (MIS) 2. We address the question whether such changes reflect variable transport pathways from a unique source area or rather a variable apportionment from diverse Southern Hemisphere sources transported at different elevation in the troposphere. The Sr-Nd radiogenic isotope composition of glacial dust samples as well as single-particle Raman mineralogy support the hypothesis of a single dust provenance both for coarse and fine mode dust events at Dome B. The southern South American provenance of glacial dust in Antarctica deduced from these results indicate a dust composition coherent with a mixture of volcanic material and minerals derived from metamorphic and plutonic rocks. Additionally, Dome B glacial samples contain aragonite particles along with diatom valves of marine benthic/epiphytic species and freshwater species living today in the northern Antarctic Peninsula and southern South America. These data suggest contribution from the exposed Patagonian continental shelf and glacial outwash plains of southern Patagonia at the time when sea level reached its minimum. Our results confirm that dust sorting is controlled by the relative intensity of the two main patterns of tropospheric dust transport onto the inner Plateau, i.e. fast low-level advection and long-range high-altitude transport including air subsidence over Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core Swedish Museum of Natural History: Publications (DiVA) Antarctic Antarctic Peninsula East Antarctica Patagonia Quaternary Science Reviews 168 55 68 |
institution |
Open Polar |
collection |
Swedish Museum of Natural History: Publications (DiVA) |
op_collection_id |
ftnrm |
language |
English |
topic |
Antarctic ice cores dust Sr and Nd isotopes Climate Research Klimatforskning |
spellingShingle |
Antarctic ice cores dust Sr and Nd isotopes Climate Research Klimatforskning Delmonte, B Paleari, C. I. Andò, S Garzantini, E Andersson, Per Sune Petit, J.R. Crosta, X Narcisi, B Baroni, C Salvatore, M.C. Baccolo, G. Maggi, Valter Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 |
topic_facet |
Antarctic ice cores dust Sr and Nd isotopes Climate Research Klimatforskning |
description |
We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 S, 94 55 E) ice core, central East Antarctica, during Marine Isotope Stage (MIS) 2. We address the question whether such changes reflect variable transport pathways from a unique source area or rather a variable apportionment from diverse Southern Hemisphere sources transported at different elevation in the troposphere. The Sr-Nd radiogenic isotope composition of glacial dust samples as well as single-particle Raman mineralogy support the hypothesis of a single dust provenance both for coarse and fine mode dust events at Dome B. The southern South American provenance of glacial dust in Antarctica deduced from these results indicate a dust composition coherent with a mixture of volcanic material and minerals derived from metamorphic and plutonic rocks. Additionally, Dome B glacial samples contain aragonite particles along with diatom valves of marine benthic/epiphytic species and freshwater species living today in the northern Antarctic Peninsula and southern South America. These data suggest contribution from the exposed Patagonian continental shelf and glacial outwash plains of southern Patagonia at the time when sea level reached its minimum. Our results confirm that dust sorting is controlled by the relative intensity of the two main patterns of tropospheric dust transport onto the inner Plateau, i.e. fast low-level advection and long-range high-altitude transport including air subsidence over Antarctica. |
format |
Article in Journal/Newspaper |
author |
Delmonte, B Paleari, C. I. Andò, S Garzantini, E Andersson, Per Sune Petit, J.R. Crosta, X Narcisi, B Baroni, C Salvatore, M.C. Baccolo, G. Maggi, Valter |
author_facet |
Delmonte, B Paleari, C. I. Andò, S Garzantini, E Andersson, Per Sune Petit, J.R. Crosta, X Narcisi, B Baroni, C Salvatore, M.C. Baccolo, G. Maggi, Valter |
author_sort |
Delmonte, B |
title |
Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 |
title_short |
Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 |
title_full |
Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 |
title_fullStr |
Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 |
title_full_unstemmed |
Causes of dust size variability in central East Antarctica (Dome B):Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 |
title_sort |
causes of dust size variability in central east antarctica (dome b):atmospheric transport from expanded south american sources during marine isotope stage 2 |
publisher |
Enheten för geovetenskap |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2398 https://doi.org/10.1016/j.quascirev.2017.05.009 |
geographic |
Antarctic Antarctic Peninsula East Antarctica Patagonia |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica Patagonia |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica ice core |
op_relation |
Quaternary Science Reviews, 0277-3791, 2017, 168, s. 55-68 info:eu-repo/grantAgreement/EC/FP7/SE-TAF-5636 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2398 doi:10.1016/j.quascirev.2017.05.009 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2017.05.009 |
container_title |
Quaternary Science Reviews |
container_volume |
168 |
container_start_page |
55 |
op_container_end_page |
68 |
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1766277184576552960 |