Causes of dust size variability in central East Antarctica (Dome B): Atmospheric transport from expanded South American sources during Marine Isotope Stage 2
Marine isotope stage 2 Micron-size particle Raman mineralogy a b s t r a c t We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 0 S, 94 55' E) ice core, central East Antarctica, during Marine Isotope Stage (MIS) 2. We address t...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/199800 https://hdl.handle.net/20.500.12278/199800 https://doi.org/10.1016/j.quascirev.2017.05.009 |
id |
ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/199800 |
---|---|
record_format |
openpolar |
spelling |
ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/199800 2024-06-16T07:34:41+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 PALEARI, Chiara Ileana ANDÒ, Sergio GARZANTI, Eduardo ANDERSSON, Per Sune PETIT, Jean Robert CROSTA, Xavier NARCISI, Biancamaria BARONI, Carlo SALVATORE, Maria Cristina BACCOLO, Giovanni MAGGI, Valter 2017-07 https://oskar-bordeaux.fr/handle/20.500.12278/199800 https://hdl.handle.net/20.500.12278/199800 https://doi.org/10.1016/j.quascirev.2017.05.009 EN eng 0277-3791 https://oskar-bordeaux.fr/handle/20.500.12278/199800 doi:10.1016/j.quascirev.2017.05.009 open Pas de Licence CC Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Océanographie Planète et Univers [physics]/Sciences de la Terre/Climatologie Article de revue 2017 ftoskarbordeaux https://doi.org/20.500.12278/19980010.1016/j.quascirev.2017.05.009 2024-05-19T23:40:39Z Marine isotope stage 2 Micron-size particle Raman mineralogy a b s t r a c t We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 0 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 OSKAR Bordeaux (Open Science Knowledge ARchive) Antarctic Antarctic Peninsula East Antarctica Patagonia Quaternary Science Reviews 168 55 68 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Océanographie Planète et Univers [physics]/Sciences de la Terre/Climatologie |
spellingShingle |
Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Océanographie Planète et Univers [physics]/Sciences de la Terre/Climatologie DELMONTE, Barbara PALEARI, Chiara Ileana ANDÒ, Sergio GARZANTI, Eduardo ANDERSSON, Per Sune PETIT, Jean Robert CROSTA, Xavier NARCISI, Biancamaria BARONI, Carlo SALVATORE, Maria Cristina BACCOLO, Giovanni 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 |
Planète et Univers [physics]/Océan Atmosphère Planète et Univers [physics]/Sciences de la Terre/Océanographie Planète et Univers [physics]/Sciences de la Terre/Climatologie |
description |
Marine isotope stage 2 Micron-size particle Raman mineralogy a b s t r a c t We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 0 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, Barbara PALEARI, Chiara Ileana ANDÒ, Sergio GARZANTI, Eduardo ANDERSSON, Per Sune PETIT, Jean Robert CROSTA, Xavier NARCISI, Biancamaria BARONI, Carlo SALVATORE, Maria Cristina BACCOLO, Giovanni MAGGI, Valter |
author_facet |
DELMONTE, Barbara PALEARI, Chiara Ileana ANDÒ, Sergio GARZANTI, Eduardo ANDERSSON, Per Sune PETIT, Jean Robert CROSTA, Xavier NARCISI, Biancamaria BARONI, Carlo SALVATORE, Maria Cristina BACCOLO, Giovanni MAGGI, Valter |
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 |
publishDate |
2017 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/199800 https://hdl.handle.net/20.500.12278/199800 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 |
0277-3791 https://oskar-bordeaux.fr/handle/20.500.12278/199800 doi:10.1016/j.quascirev.2017.05.009 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/19980010.1016/j.quascirev.2017.05.009 |
container_title |
Quaternary Science Reviews |
container_volume |
168 |
container_start_page |
55 |
op_container_end_page |
68 |
_version_ |
1802010283030347776 |