Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs
Atmospheric inputs of soluble iron (Fe) to the global ocean are an important factor determining marine primary productivity and nitrogen fixation. To investigate soluble aerosol Fe and fractional Fe solubility, marine aerosol sampling has been conducted from a number of platforms including aerosol t...
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ftcopernicus:oai:publications.copernicus.org:amtd49373 2023-05-15T18:25:07+02:00 Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs Winton, Holly Bowie, Andrew Keywood, Melita Merwe, Pier Edwards, Ross 2018-08-11 application/pdf https://doi.org/10.5194/amt-2016-12 https://amt.copernicus.org/preprints/amt-2016-12/ eng eng doi:10.5194/amt-2016-12 https://amt.copernicus.org/preprints/amt-2016-12/ eISSN: 1867-8548 Text 2018 ftcopernicus https://doi.org/10.5194/amt-2016-12 2020-07-20T16:24:12Z Atmospheric inputs of soluble iron (Fe) to the global ocean are an important factor determining marine primary productivity and nitrogen fixation. To investigate soluble aerosol Fe and fractional Fe solubility, marine aerosol sampling has been conducted from a number of platforms including aerosol towers, ship and buoy platforms. A number of these studies have used commercially available high-volume aerosol samplers to collect aerosols from large volumes of air. These samplers are attractive for sampling air from low Fe air masses since they can rapidly concentrate large volumes improving detection limits. Here we investigate the use of a high-volume sampler from the Cape Grim Baseline Air Pollution Station (CGBAPS), Tasmania, Australia to sample aerosol Fe from baseline Southern Ocean air-masses. The study followed the United States Environmental Protection Agency (EPA) standard for the sampling of ambient air using high-volume sampler, and the recommendations and protocols from GEOTRACES community for sampling, sample preparation and digestion of trace element aerosols. Analysis and inspection of exposure blank (one month exposure) filters for Fe, and other metals, revealed significant contamination resulting from passive deposition of local soil, plants and insects. The results of the study suggest that high-volume aerosol samplers may not be suitable for low concentration air masses over the Southern Ocean without some mechanism to hermetically seal the sampler when the baseline sampling criteria are not met. Text Southern Ocean Copernicus Publications: E-Journals Grim ENVELOPE(-64.486,-64.486,-65.379,-65.379) Southern Ocean |
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Copernicus Publications: E-Journals |
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English |
description |
Atmospheric inputs of soluble iron (Fe) to the global ocean are an important factor determining marine primary productivity and nitrogen fixation. To investigate soluble aerosol Fe and fractional Fe solubility, marine aerosol sampling has been conducted from a number of platforms including aerosol towers, ship and buoy platforms. A number of these studies have used commercially available high-volume aerosol samplers to collect aerosols from large volumes of air. These samplers are attractive for sampling air from low Fe air masses since they can rapidly concentrate large volumes improving detection limits. Here we investigate the use of a high-volume sampler from the Cape Grim Baseline Air Pollution Station (CGBAPS), Tasmania, Australia to sample aerosol Fe from baseline Southern Ocean air-masses. The study followed the United States Environmental Protection Agency (EPA) standard for the sampling of ambient air using high-volume sampler, and the recommendations and protocols from GEOTRACES community for sampling, sample preparation and digestion of trace element aerosols. Analysis and inspection of exposure blank (one month exposure) filters for Fe, and other metals, revealed significant contamination resulting from passive deposition of local soil, plants and insects. The results of the study suggest that high-volume aerosol samplers may not be suitable for low concentration air masses over the Southern Ocean without some mechanism to hermetically seal the sampler when the baseline sampling criteria are not met. |
format |
Text |
author |
Winton, Holly Bowie, Andrew Keywood, Melita Merwe, Pier Edwards, Ross |
spellingShingle |
Winton, Holly Bowie, Andrew Keywood, Melita Merwe, Pier Edwards, Ross Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
author_facet |
Winton, Holly Bowie, Andrew Keywood, Melita Merwe, Pier Edwards, Ross |
author_sort |
Winton, Holly |
title |
Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
title_short |
Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
title_full |
Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
title_fullStr |
Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
title_full_unstemmed |
Suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
title_sort |
suitability of high-volume aerosol samplers for ultra-trace aerosol iron measurements in pristine air masses: blanks, recoveries and bugs |
publishDate |
2018 |
url |
https://doi.org/10.5194/amt-2016-12 https://amt.copernicus.org/preprints/amt-2016-12/ |
long_lat |
ENVELOPE(-64.486,-64.486,-65.379,-65.379) |
geographic |
Grim Southern Ocean |
geographic_facet |
Grim Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
eISSN: 1867-8548 |
op_relation |
doi:10.5194/amt-2016-12 https://amt.copernicus.org/preprints/amt-2016-12/ |
op_doi |
https://doi.org/10.5194/amt-2016-12 |
_version_ |
1766206349963689984 |