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

被引：23

作者：

Lanci, L. ^{[1
]}

Delmonte, B. ^{[2
]}

Maggi, V. ^{[2
]}

Petit, J. R. ^{[3
]}

Kent, D. V. ^{[4
,5
]}

机构：

[1] Univ Urbino, Ist Sci Terra, I-61100 Urbino, PU, Italy

[2] Univ Milan, Dipartimento Sci Ambiente & Terr, I-20126 Milan, Italy

[3] CNRS, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France

[4] Rutgers State Univ, Dept Earth & Planetary Sci, Piscataway, NJ 08854 USA

[5] Lamont Doherty Earth Observ, Palisades, NY USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2008年 / 113卷 / D14期

关键词：

D O I：

10.1029/2007JD009678

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

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.

引用

页数：7

共 14 条

[1] Eight glacial cycles from an Antarctic ice core [J].

Augustin, L ;

Barbante, C ;

Barnes, PRF ;

Barnola, JM ;

Bigler, M ;

Castellano, E ;

Cattani, O ;

Chappellaz, J ;

DahlJensen, D ;

Delmonte, B ;

Dreyfus, G ;

Durand, G ;

Falourd, S ;

Fischer, H ;

Flückiger, J ;

Hansson, ME ;

Huybrechts, P ;

Jugie, R ;

Johnsen, SJ ;

Jouzel, J ;

Kaufmann, P ;

Kipfstuhl, J ;

Lambert, F ;

Lipenkov, VY ;

Littot, GVC ;

Longinelli, A ;

Lorrain, R ;

Maggi, V ;

Masson-Delmotte, V ;

Miller, H ;

Mulvaney, R ;

Oerlemans, J ;

Oerter, H ;

Orombelli, G ;

Parrenin, F ;

Peel, DA ;

Petit, JR ;

Raynaud, D ;

Ritz, C ;

Ruth, U ;

Schwander, J ;

Siegenthaler, U ;

Souchez, R ;

Stauffer, B ;

Steffensen, JP ;

Stenni, B ;

Stocker, TF ;

Tabacco, IE ;

Udisti, R ;

van de Wal, RSW .

NATURE, 2004, 429 (6992) :623-628

[2] SUB-ICE TOPOGRAPHY AND METEORITE FINDS NEAR THE ALLAN HILLS AND THE NEAR WESTERN ICE FIELD, VICTORIA LAND, ANTARCTICA [J].

DELISLE, G ;

SIEVERS, J .

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, 1991, 96 (E1) :15577-15587

[3] Comparing the Epica and Vostok dust records during the last 220,000 years: stratigraphical correlation and provenance in glacial periods [J].

Delmonte, B ;

Basile-Doelsch, I ;

Petit, JR ;

Maggi, V ;

Revel-Rolland, M ;

Michard, A ;

Jagoutz, E ;

Grousset, F .

EARTH-SCIENCE REVIEWS, 2004, 66 (1-2) :63-87

[4] Glacial to Holocene implications of the new 27000-year dust record from the EPICA Dome C (East Antarctica) ice core [J].

Delmonte, B ;

Petit, JR ;

Maggi, V .

CLIMATE DYNAMICS, 2002, 18 (08) :647-660

[5]

Delmonte B, 2007, DEV QUATER SCI, V7, P53

[6]

Dunlop D.J., 1997, Rock Magnetism: Fundamentals and Frontiers, DOI DOI 10.1017/CBO9780511612794

[7] SUPERPARAMAGNETIC AND SINGLE-DOMAIN THRESHOLD SIZES IN MAGNETITE [J].

DUNLOP, DJ .

JOURNAL OF GEOPHYSICAL RESEARCH, 1973, 78 (11) :1780-1793

[8]

Evans M.Heller., 2003, Environmental magnetism: principles and applications of environmagnetics

[9] Meteoric smoke fallout revealed by superparamagnetism in Greenland ice [J].

Lanci, L. ;

Kent, D. V. .

GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (13)

[10] Introduction of thermal activation in forward modeling of hysteresis loops for single-domain magnetic particles and implications for the interpretation of the Day diagram [J].

Lanci, L ;

Kent, DV .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2003, 108 (B3)

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