Evaluation of aeolian dust records obtained from Polar Ice Cores

Kettner, Ernesto; Grinsted, Aslak; Wegner, Anna; Petit, Jean Robert; Erhardt, Tobias; Schüpbach, Simon; Vallelonga, Paul; Svensson, Anders (2014). Evaluation of aeolian dust records obtained from Polar Ice Cores. ProScience Conference Proceedings, 1, pp. 266-272. Digilabs S.a.s. 10.14644/dust.2014.044

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When an ice core sample is analysed for its aeolian dust content, it is melted and the particles detected are suspended in water. Consequently, dust measurement techniques employed in the ice core community differ from those used for in-situ studies of airborne dust. Methods commonly used to classify insolubles suspended in a liquid are either based on the particles’ interaction with light or on the detection of resistive pulses by means of Coulter counting. Data sets obtained with Coulter counters are widely accepted as references and other techniques are judged against their ability to reproduce these. Unfortunately, optically acquired ice core dust records were found to differ. By analyzing two sections of the NEEM dust record, two different evaluation procedures are discussed before a third protocol is proposed. It is found that relative changes in the archived dust load can be reproduced, while the simultaneous attainment of absolute concentrations or changes in the grain size frequency histograms in high resolution remains difficult.

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:

2283-5954

Publisher:

Digilabs S.a.s.

Language:

English

Submitter:

Doris Rätz

Date Deposited:

01 May 2015 14:21

Last Modified:

01 May 2015 14:21

Publisher DOI:

10.14644/dust.2014.044

BORIS DOI:

10.7892/boris.64739

URI:

https://boris.unibe.ch/id/eprint/64739

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