Isothermal remanent magnetization and insoluble dust content of ice samples from EPICA-Dome C ice core were measured to characterize the magnetic properties of atmospheric dust. Despite the larger concentration of dust aerosol during glacial stages, the magnetization of the dust fraction was found to be higher during interglacials and exhibits a larger variability. Changes in magnetic mineralogy of aerosol dust in ice from different climatic stages were also characterized using coercivity of remanence. Variations of magnetic properties of dust from glacial to interglacial stages indicate changes in dust provenance, in agreement with previous results based on geochemical analysis. However, the extremely large magnetizations of some interglacial samples also suggest that episodical eolian deposition from highly magnetic deposits occurred during interglacial periods. Copyright 2008 by the American Geophysical Union.

Lanci, L., Delmonte, B., Maggi, V., Petit, J., Kent, D. (2008). Ice magnetization in the EPICA-Dome C ice core: implication for dust sources during glacial and interglacial periods. JOURNAL OF GEOPHYSICAL RESEARCH: SPACE PHYSICS, 113(D14207) [10.1029/2007JD009678].

Ice magnetization in the EPICA-Dome C ice core: implication for dust sources during glacial and interglacial periods.

DELMONTE, BARBARA;MAGGI, VALTER;
2008

Abstract

Isothermal remanent magnetization and insoluble dust content of ice samples from EPICA-Dome C ice core were measured to characterize the magnetic properties of atmospheric dust. Despite the larger concentration of dust aerosol during glacial stages, the magnetization of the dust fraction was found to be higher during interglacials and exhibits a larger variability. Changes in magnetic mineralogy of aerosol dust in ice from different climatic stages were also characterized using coercivity of remanence. Variations of magnetic properties of dust from glacial to interglacial stages indicate changes in dust provenance, in agreement with previous results based on geochemical analysis. However, the extremely large magnetizations of some interglacial samples also suggest that episodical eolian deposition from highly magnetic deposits occurred during interglacial periods. Copyright 2008 by the American Geophysical Union.
Articolo in rivista - Articolo scientifico
Magnetization, ice cores, dust, paleoclimate
English
Lanci, L., Delmonte, B., Maggi, V., Petit, J., Kent, D. (2008). Ice magnetization in the EPICA-Dome C ice core: implication for dust sources during glacial and interglacial periods. JOURNAL OF GEOPHYSICAL RESEARCH: SPACE PHYSICS, 113(D14207) [10.1029/2007JD009678].
Lanci, L; Delmonte, B; Maggi, V; Petit, J; Kent, D
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/9046
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