Methods for the sampling and analysis of marine aerosols: results from the 2008 GEOTRACES aerosol intercalibration experiment | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Methods for the sampling and analysis of marine aerosols: results from the 2008 GEOTRACES aerosol intercalibration experiment

Type de publication:

Journal Article

Source:

Limnology and Oceanography: Methods, Volume 11, p.62–78 (2013)

URL:

http://eprints.uni-kiel.de/20756/

Mots-clés:

AFRICAN DUST, ATLANTIC-OCEAN, ATMOSPHERE, biogeochemistry, DEPOSITION, intercomparison, Mercury, NUTRIENTS, PARTICLES, QUARTZ FIBER, SIZE, TRANSPORT

Résumé:

<p>{Atmospheric deposition of trace elements and isotopes (TEI) is an important source of trace metals to the open ocean, impacting TEI budgets and distributions, stimulating oceanic primary productivity, and influencing biological community structure and function. Thus, accurate sampling of aerosol TEIs is a vital component of ongoing GEOTRACES cruises, and standardized aerosol TEI sampling and analysis procedures allow the comparison of data from different sites and investigators. Here, we report the results of an aerosol analysis intercalibration study by seventeen laboratories for select GEOTRACES-relevant aerosol species (Al, Fe, Ti, V, Zn, Pb, Hg, NO3-, and SO42-) for samples collected in September 2008. The collection equipment and filter substrates are appropriate for the GEOTRACES program, as evidenced by low blanks and detection limits relative to analyte concentrations. Analysis of bulk aerosol sample replicates were in better agreement when the processing protocol was constrained (+/- 9% RSD or better on replicate analyses by a single lab</p>