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Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading

Located duplicate portable AE51 Aethalometers and a UK Government reference AE22 Aethalometer (the data for the latter were corrected for filter darkening effects using a standard procedure), at an urban background site in Glasgow, UK. The AE51 and the reference concentrations were highly correlated...

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Main Authors: Masey, Nicola, Ezani, Nur Eliani, Gillespie, Jonathan, Sutherland, Fiona, Lin, Chun, Hamilton, Scott, Heal, Mathew R., Beverland, Iain J.
Format: Article
Language:English
Published: AAGR Aerosol and Air Quality Research 2020
Online Access:http://psasir.upm.edu.my/id/eprint/88245/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/88245/
https://aaqr.org/articles/aaqr-19-03-lcs-0145
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spelling my.upm.eprints.882452022-03-10T05:43:00Z http://psasir.upm.edu.my/id/eprint/88245/ Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading Masey, Nicola Ezani, Nur Eliani Gillespie, Jonathan Sutherland, Fiona Lin, Chun Hamilton, Scott Heal, Mathew R. Beverland, Iain J. Located duplicate portable AE51 Aethalometers and a UK Government reference AE22 Aethalometer (the data for the latter were corrected for filter darkening effects using a standard procedure), at an urban background site in Glasgow, UK. The AE51 and the reference concentrations were highly correlated (R2 ≥ 0.87) for the combined deployment periods. The application of a previously reported method for correcting the AE51’s underestimation of concentrations, associated with filter loading, generally led to an overestimation of values (specifically, the normalised mean bias values for the two AE51s increased from –2% and +3% to +14% and +25% across the full range of measurements after correction). We found only limited and inconsistent evidence that the AE51 Aethalometers (attenuation [AE51_ATN] ≤ ~52) underestimated the eBC concentrations compared to the reference measurements. Thus, our observations indicate that the AE51 can achieve close agreement with the reference AE22 monitor without applying corrections for filter loading at relatively low AE51_ATN values in environments with low eBC concentrations. AAGR Aerosol and Air Quality Research 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/88245/1/ABSTRACT.pdf Masey, Nicola and Ezani, Nur Eliani and Gillespie, Jonathan and Sutherland, Fiona and Lin, Chun and Hamilton, Scott and Heal, Mathew R. and Beverland, Iain J. (2020) Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading. Aerosol and Air Quality Research, 20 (2). 329 - 340. ISSN 1680-8584; ESSN: 2071-1409 https://aaqr.org/articles/aaqr-19-03-lcs-0145 10.4209/aaqr.2019.03.0145
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Located duplicate portable AE51 Aethalometers and a UK Government reference AE22 Aethalometer (the data for the latter were corrected for filter darkening effects using a standard procedure), at an urban background site in Glasgow, UK. The AE51 and the reference concentrations were highly correlated (R2 ≥ 0.87) for the combined deployment periods. The application of a previously reported method for correcting the AE51’s underestimation of concentrations, associated with filter loading, generally led to an overestimation of values (specifically, the normalised mean bias values for the two AE51s increased from –2% and +3% to +14% and +25% across the full range of measurements after correction). We found only limited and inconsistent evidence that the AE51 Aethalometers (attenuation [AE51_ATN] ≤ ~52) underestimated the eBC concentrations compared to the reference measurements. Thus, our observations indicate that the AE51 can achieve close agreement with the reference AE22 monitor without applying corrections for filter loading at relatively low AE51_ATN values in environments with low eBC concentrations.
format Article
author Masey, Nicola
Ezani, Nur Eliani
Gillespie, Jonathan
Sutherland, Fiona
Lin, Chun
Hamilton, Scott
Heal, Mathew R.
Beverland, Iain J.
spellingShingle Masey, Nicola
Ezani, Nur Eliani
Gillespie, Jonathan
Sutherland, Fiona
Lin, Chun
Hamilton, Scott
Heal, Mathew R.
Beverland, Iain J.
Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading
author_facet Masey, Nicola
Ezani, Nur Eliani
Gillespie, Jonathan
Sutherland, Fiona
Lin, Chun
Hamilton, Scott
Heal, Mathew R.
Beverland, Iain J.
author_sort Masey, Nicola
title Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading
title_short Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading
title_full Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading
title_fullStr Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading
title_full_unstemmed Consistency of urban background black carbon concentration measurements by portable AE51 and reference AE22 aethalometers: effect of corrections for filter loading
title_sort consistency of urban background black carbon concentration measurements by portable ae51 and reference ae22 aethalometers: effect of corrections for filter loading
publisher AAGR Aerosol and Air Quality Research
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/88245/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/88245/
https://aaqr.org/articles/aaqr-19-03-lcs-0145
_version_ 1728052821904850944
score 13.211869

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