Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods
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 t...
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D8F76P3C 2024-09-15T18:04:51+00:00 Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods Lanci, Luca Delmonte, B. Maggi, V. Petit, Jean-Robert Kent, Dennis V. 2008 https://doi.org/10.7916/D8F76P3C English eng https://doi.org/10.7916/D8F76P3C Geophysics Atmosphere Articles 2008 ftcolumbiauniv https://doi.org/10.7916/D8F76P3C 2024-08-23T04:10:25Z 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. Article in Journal/Newspaper EPICA ice core Columbia University: Academic Commons |
institution |
Open Polar |
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Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Geophysics Atmosphere |
spellingShingle |
Geophysics Atmosphere Lanci, Luca Delmonte, B. Maggi, V. Petit, Jean-Robert Kent, Dennis V. Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods |
topic_facet |
Geophysics Atmosphere |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Lanci, Luca Delmonte, B. Maggi, V. Petit, Jean-Robert Kent, Dennis V. |
author_facet |
Lanci, Luca Delmonte, B. Maggi, V. Petit, Jean-Robert Kent, Dennis V. |
author_sort |
Lanci, Luca |
title |
Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods |
title_short |
Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods |
title_full |
Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods |
title_fullStr |
Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods |
title_full_unstemmed |
Ice magnetization in the EPICA-Dome C ice core: Implication for dust sources during glacial and interglacial periods |
title_sort |
ice magnetization in the epica-dome c ice core: implication for dust sources during glacial and interglacial periods |
publishDate |
2008 |
url |
https://doi.org/10.7916/D8F76P3C |
genre |
EPICA ice core |
genre_facet |
EPICA ice core |
op_relation |
https://doi.org/10.7916/D8F76P3C |
op_doi |
https://doi.org/10.7916/D8F76P3C |
_version_ |
1810442462863294464 |