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 uniqu...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , , , , , , |
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier Ltd
2017
|
Subjects: | |
Online Access: | http://hdl.handle.net/10281/156340 https://doi.org/10.1016/j.quascirev.2017.05.009 |
id |
ftunivmilanobic:oai:boa.unimib.it:10281/156340 |
---|---|
record_format |
openpolar |
spelling |
ftunivmilanobic:oai:boa.unimib.it:10281/156340 2024-04-14T08:04:03+00:00 Causes of dust size variability in central East Antarctica (Dome B): Atmospheric transport from expanded South American sources during Marine Isotope Stage 2 DELMONTE, BARBARA ANDO', SERGIO GARZANTI, EDUARDO ALDO FRANCO MAGGI, VALTER Paleari, C Andersson, P Petit, J Crosta, X Narcisi, B Baroni, C Salvatore, M Baccolo, G Delmonte, B Paleari, C Ando', S Garzanti, E Andersson, P Petit, J Crosta, X Narcisi, B Baroni, C Salvatore, M Baccolo, G Maggi, V 2017 http://hdl.handle.net/10281/156340 https://doi.org/10.1016/j.quascirev.2017.05.009 eng eng Elsevier Ltd country:GB info:eu-repo/semantics/altIdentifier/wos/WOS:000404311500005 volume:168 firstpage:55 lastpage:68 numberofpages:14 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/10281/156340 doi:10.1016/j.quascirev.2017.05.009 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019399066 info:eu-repo/semantics/closedAccess Quaternary Paleoclimatology Antarctica Ice cores Dust Provenance Marine isotope stage 2 Micron-size particle Raman mineralogy info:eu-repo/semantics/article 2017 ftunivmilanobic https://doi.org/10.1016/j.quascirev.2017.05.009 2024-03-21T02:08:44Z 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 Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Antarctic Antarctic Peninsula East Antarctica Patagonia Quaternary Science Reviews 168 55 68 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
Quaternary Paleoclimatology Antarctica Ice cores Dust Provenance Marine isotope stage 2 Micron-size particle Raman mineralogy |
spellingShingle |
Quaternary Paleoclimatology Antarctica Ice cores Dust Provenance Marine isotope stage 2 Micron-size particle Raman mineralogy DELMONTE, BARBARA ANDO', SERGIO GARZANTI, EDUARDO ALDO FRANCO MAGGI, VALTER Paleari, C Andersson, P Petit, J Crosta, X Narcisi, B Baroni, C Salvatore, M Baccolo, G 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 |
Quaternary Paleoclimatology Antarctica Ice cores Dust Provenance Marine isotope stage 2 Micron-size particle Raman mineralogy |
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. |
author2 |
Delmonte, B Paleari, C Ando', S Garzanti, E Andersson, P Petit, J Crosta, X Narcisi, B Baroni, C Salvatore, M Baccolo, G Maggi, V |
format |
Article in Journal/Newspaper |
author |
DELMONTE, BARBARA ANDO', SERGIO GARZANTI, EDUARDO ALDO FRANCO MAGGI, VALTER Paleari, C Andersson, P Petit, J Crosta, X Narcisi, B Baroni, C Salvatore, M Baccolo, G |
author_facet |
DELMONTE, BARBARA ANDO', SERGIO GARZANTI, EDUARDO ALDO FRANCO MAGGI, VALTER Paleari, C Andersson, P Petit, J Crosta, X Narcisi, B Baroni, C Salvatore, M Baccolo, G |
author_sort |
DELMONTE, BARBARA |
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 |
Elsevier Ltd |
publishDate |
2017 |
url |
http://hdl.handle.net/10281/156340 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 |
info:eu-repo/semantics/altIdentifier/wos/WOS:000404311500005 volume:168 firstpage:55 lastpage:68 numberofpages:14 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/10281/156340 doi:10.1016/j.quascirev.2017.05.009 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019399066 |
op_rights |
info:eu-repo/semantics/closedAccess |
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 |
_version_ |
1796300413968842752 |