Multiple sources of Greenland dust throughout the Holocene

Kettner, Ernesto; Wegner, Anna; Erhardt, Tobias; Schüpbach, Simon (2014). Multiple sources of Greenland dust throughout the Holocene. In: Fiore, Saverio (ed.) 1st International Conference on Atmospheric Dust-DUST2014. ProScience: Vol. 1 (pp. 32-37). Digilabs S.a.s. 10.14644/dust.2014.006

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It is contested that the mineral dust found in Greenlandic ice cores during the Holocene stems from multiple source areas. Particles entrained above a more productive, primary source dominate the signal’s multi-seasonal average. Data in sub-annual resolution, however, reveal at least one further source. Whereas distinct inputs from the primary source are visible in elevated concentration levels, various inputs of the secondary source(s) are reflected by multiple maxima in the coarse particle percentage. As long as the dust sources’ respective seasonal cycles are preserved, primary and secondary source can be distinguished. Since the two source’s ejecta eventually detected differ in size, which can be attributed to a change in atmospheric residence times, it is suggested that the secondary source is located in closer proximity to the drilling site than the primary one.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)

UniBE Contributor:

Erhardt, Tobias and Schüpbach, Simon

Subjects:

500 Science > 530 Physics

ISSN:

283-5954

Series:

ProScience

Publisher:

Digilabs S.a.s.

Language:

English

Submitter:

Doris Rätz

Date Deposited:

17 Mar 2015 09:38

Last Modified:

30 Apr 2015 09:31

Publisher DOI:

10.14644/dust.2014.006

BORIS DOI:

10.7892/boris.64740

URI:

https://boris.unibe.ch/id/eprint/64740

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