Proxies and measurement techniques for mineral dust in Antarctic ice cores.
Environ Sci Technol
; 42(15): 5675-81, 2008 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-18754492
ABSTRACT
To improve quantitative interpretation of ice core aeolian dust records, a systematic methodological comparison was made. This involved methods for water-insoluble particle counting (Coulter counter and laser-sensing particle detector), soluble ion analysis (ion chromatography and continuous flow analysis), elemental analysis (inductively coupled plasma mass spectroscopy at pH 1 and after full acid digestion), and water-insoluble elemental analysis (proton induced X-ray emission). Antarctic ice core samples covering the last deglaciation from the EPICA Dome C (EDC) and the EPICA Dronning Maud Land (EDML) cores were used. All methods correlate very well among each other, but the ratios of glacial age to Holocene concentrations, which are typically a factor approximately 100, differ between the methods by up to a factor of 2 with insoluble particles showing the largest variability. The recovery of ICP-MS measurements depends on the digestion method and is differentfor different elements and during different climatic periods. EDC and EDML samples have similar dust composition, which suggests a common dust source or a common mixture of sources for the two sites. The analyzed samples further reveal a change of dust composition during the last deglaciation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrometria de Massas
/
Monitoramento Ambiental
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Exposição por Inalação
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Poeira
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Poluentes Ambientais
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Gelo
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Minerais
Idioma:
En
Revista:
Environ Sci Technol
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Alemanha