European glacial dust deposits: Geochemical constraints on atmospheric dust cycle modeling


Rousseau, Denis-Didier, Chauvel, Catherine, Sima, Adriana, Hatte, Christine, Lagroix, France, Antoine, Pierre, Balkanski, Yves, Fuchs, Markus, Mellett, Claire, Kageyama, Masa et al (show 2 more authors) (2014) European glacial dust deposits: Geochemical constraints on atmospheric dust cycle modeling GEOPHYSICAL RESEARCH LETTERS, 41 (21). pp. 7666-7674. ISSN 0094-8276, 1944-8007

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Abstract

For a long time global paleodust numerical simulations have greatly underestimated dust sources other than modern deserts. Recent modeling experiments incorporating glaciogenic sources of dust have positively improved the agreement between model and paleodust data. This highlights the importance of accurately representing all areas potentially subjected to deflation during an investigated interval. Geochemical results, obtained from European loess sequences collected along a 50°N transect, combined with dust emission simulations reveal the geographical distribution of the most important European dust sources between 34 ka and 18 ka. We demonstrate that most European dust traveled only a few hundred kilometers or less within the boundary layer from its source before deposition. We conclude that our results encourage acquisition of similar geochemical data for other relevant areas in the world. Further, they could provide critical constraints to benchmark atmospheric models, contributing to improve their performance in simulating dust cycle and associated climate feedbacks. Key Points We identify the main aerosol sources for different depositional areasThe main contributors were regions between 48 and 52°N, with variable hot spotsDust was transported at low elevation and over regional distances only

Item Type: Article
Uncontrolled Keywords: 37 Earth Sciences, 3705 Geology, 13 Climate Action
Subjects: ?? GB ??
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Depositing User: Symplectic Admin
Date Deposited: 09 Dec 2014 15:25
Last Modified: 16 Jun 2026 12:33
DOI: 10.1002/2014GL061382
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URI: https://livrepository.liverpool.ac.uk/id/eprint/2003219
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