Journal articles
Reconstruction of millennial changes in dust emission, transport and regional sea ice coverage using the deep EPICA ice cores from the Atlantic and Indian Ocean sector of Antarctica
Hubertus Fischer
1
Felix Fundel
1
Urs Ruth
1
Birthe Twarloh
1
Anna Wegner
1
Roberto Udisti
2
Silvia Becagli
2
Emiliano Castellano
2
Andrea Morganti
2
Mirko Severi
2
Eric Wolff
3
Genevieve Littot
3
Regine Röthlisberger
3
Rob Mulvaney
3
Manuel A. Hutterli
3, 4
Patrik Kaufmann
4
Urs Federer
4
Fabrice Lambert
4
Matthias Bigler
4, 5
Margareta Hansson
6
Ulf Jonsell
6
Martine de Angelis
7
Claude Boutron
7
Marie-Louise Siggaard-Andersen
5
Jorgen Peder Steffensen
5
Carlo Barbante
8, 9
Vania Gaspari
9
Paolo Gabrielli
8
Dietmar Wagenbach
10
Regine Röthlisberger 3
Author
Rob Mulvaney 3
Author
Manuel A. Hutterli 3, 4
Author
Patrik Kaufmann 4
Author
Urs Federer 4
Author
Fabrice Lambert 4
Author
Matthias Bigler 4, 5
Author
Margareta Hansson 6
Author
Ulf Jonsell 6
Author
Martine de Angelis 7
Author
Claude F. Boutron 7
Author
Marie-Louise Siggaard-Andersen 5
Author
Jorgen Peder Steffensen 5
Author
Carlo Barbante 8, 9
Author
Vania Gaspari 9
Author
Paolo Gabrielli 8
Author
Dietmar Wagenbach 10
Author
1
Abteilung Klinische Sozialmedizin, Berufs- und Umweltdermatologie (Heidelberg - Germany)
- Universität Heidelberg [Heidelberg] ( Seminarstraße 2, 69117 Heidelberg - Germany)
2
Department of Chemistry (University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino (Florence), Italy - Italy)
- Università degli Studi di Firenze = University of Florence [Firenze] (Piazza di San Marco, 4, 50121 Firenze FI, Italie - Italy)
3
BAS - British Antarctic Survey (High Cross, Madingley Road, Cambridge CB3 0ET - United Kingdom)
- NERC - Natural Environment Research Council (United Kingdom)
4
CEP - Climate and Environmental Physics [Bern] (Sidlerstrasse 5, 3012 Bern - Switzerland)
- Physikalisches Institut [Bern] (Sidlerstr. 5, 3012 Bern - Switzerland)
- Universität Bern [Bern] (Hochschulstrasse 4 - CH-3012 Bern - Switzerland)
5
NBI - Niels Bohr Institute [Copenhagen] (Blegdamsvej 17, DK-2100 Copenhagen - Denmark)
- Faculty of Science [Copenhagen] (Bülowsvej 17
1870 Frederiksberg C
Copenhagen
- Denmark)
- KU - University of Copenhagen = Københavns Universitet (Nørregade 10, 1165 København, Danemark - Denmark)
6
Department of Physical Geography and Quaternary Geology (Stockholm University, Stockholm - Sweden)
- Stockholm University (Stockholm University, SE-106 91 Stockholm, Sweden - Sweden)
7
LGGE - Laboratoire de glaciologie et géophysique de l'environnement (Domaine Universitaire 54 Rue Molière - BP 96 38402 ST MARTIN D HERES CEDEX - France)
- OSUG - Observatoire des Sciences de l'Univers de Grenoble (414 Rue de la piscine - BP 53 38041 GRENOBLE CEDEX 9 - France)
- UJF - Université Joseph Fourier - Grenoble 1 (BP 53 - 38041 Grenoble Cedex 9 - France)
- Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology (46 avenue Félix Viallet 38031 Grenoble Cedex 1 - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (France)
- USMB [Université de Savoie] [Université de Chambéry] - Université Savoie Mont Blanc (27, rue Marcoz - 73000 Chambéry - France)
- CNRS - Centre National de la Recherche Scientifique : UMS832 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5183 (France)
8
Institute for the Dynamics of Environmental Processes-CNR (Ca? Foscari, 30123 Venice, Italy - Italy)
- University of Ca’ Foscari [Venice, Italy] (Dorsoduro, 3246, 30123 Venice, Italy Universita di Venezia - Ca' Foscari - Italy)
9
Environmental Sciences Department (Calle Larga S. Marta, 2137, I-30123 Venice - Italy)
- University of Ca’ Foscari [Venice, Italy] (Dorsoduro, 3246, 30123 Venice, Italy Universita di Venezia - Ca' Foscari - Italy)
10
IUP - Institute of Environmental Physics [Heidelberg] (Im Neuenheimer Feld 229 , D-69120 Heidelberg - Germany)
- Universität Heidelberg [Heidelberg] ( Seminarstraße 2, 69117 Heidelberg - Germany)
Abstract : Continuous sea salt and mineral dust aerosol records have been studied on the two EPICA (European Project for Ice Coring in Antarctica) deep ice cores. The joint use of these records from opposite sides of the East Antarctic plateau allows for an estimate of changes in dust transport and emission intensity as well as for the identification of regional differences in the sea salt aerosol source. The mineral dust flux records at both sites show a strong coherency over the last 150 kyr related to dust emission changes in the glacial Patagonian dust source with three times higher dust fluxes in the Atlantic compared to the Indian Ocean sector of the Southern Ocean (SO). Using a simple conceptual transport model this indicates that transport can explain only 40% of the atmospheric dust concentration changes in Antarctica, while factor 5–10 changes occurred. Accordingly, the main cause for the strong glacial dust flux changes in Antarctica must lie in environmental changes in Patagonia. Dust emissions, hence environmental conditions in Patagonia, were very similar during the last two glacials and interglacials, respectively, despite 2–4 °C warmer temperatures recorded in Antarctica during the penultimate interglacial than today. 2–3 times higher sea salt fluxes found in both ice cores in the glacial compared to the Holocene are difficult to reconcile with a largely unchanged transport intensity and the distant open ocean source. The substantial glacial enhancements in sea salt aerosol fluxes can be readily explained assuming sea ice formation as the main sea salt aerosol source with a significantly larger expansion of (summer) sea ice in the Weddell Sea than in the Indian Ocean sector. During the penultimate interglacial, our sea salt records point to a 50% reduction of winter sea ice coverage compared to the Holocene both in the Indian and Atlantic Ocean sector of the SO. However, from 20 to 80 ka before present sea salt fluxes show only very subdued millennial changes despite pronounced temperature fluctuations, likely due to the large distance of the sea ice salt source to our drill sites.
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Contributor : Aurore Gayraud <>
Submitted on : Friday, April 17, 2009 - 11:17:01 AM
Last modification on : Friday, February 5, 2021 - 3:57:23 AM
Contributor : Aurore Gayraud <>
Submitted on : Friday, April 17, 2009 - 11:17:01 AM
Last modification on : Friday, February 5, 2021 - 3:57:23 AM
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- HAL Id : insu-00376286, version 1
- DOI : 10.1016/j.epsl.2007.06.014
Citation
Hubertus Fischer, Felix Fundel, Urs Ruth, Birthe Twarloh, Anna Wegner, et al.. Reconstruction of millennial changes in dust emission, transport and regional sea ice coverage using the deep EPICA ice cores from the Atlantic and Indian Ocean sector of Antarctica. Earth and Planetary Science Letters, Elsevier, 2007, 260 (1-2), pp.340 à 354. ⟨10.1016/j.epsl.2007.06.014⟩. ⟨insu-00376286⟩
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