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Evaluation of groun...
Evaluation of ground-based black carbon measurements by filter-based photometers at two Arctic sites
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Sinha, P. R. (author)
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Kondo, Y. (author)
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Koike, M. (author)
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Ogren, J. A. (author)
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Jefferson, A. (author)
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Barrett, T. E. (author)
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Sheesley, R. J. (author)
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Ohata, S. (author)
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Moteki, N. (author)
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Coe, H. (author)
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Liu, D. (author)
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Irwin, M. (author)
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- Tunved, Peter (author)
- Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi
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Quinn, P. K. (author)
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Zhao, Y. (author)
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(creator_code:org_t)
- 2017
- 2017
- English.
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In: Journal of Geophysical Research - Atmospheres. - 2169-897X .- 2169-8996. ; 122:6, s. 3544-3572
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Long-term measurements of the light absorption coefficient (b(abs)) obtained with a particle soot absorption photometer (PSAP), b(abs) (PSAP), have been previously reported for Barrow, Alaska, and Ny-angstrom lesund, Spitsbergen, in the Arctic. However, the effects on b(abs) of other aerosol chemical species coexisting with black carbon (BC) have not been critically evaluated. Furthermore, different mass absorption cross section (MAC) values have been used to convert b(abs) to BC mass concentration (M-BC=b(abs)/MAC). We used a continuous soot monitoring system (COSMOS), which uses a heated inlet to remove volatile aerosol compounds, to measure b(abs) (b(abs) (COSMOS)) at these sites during 2012-2015. Field measurements and laboratory experiments have suggested that b(abs) (COSMOS) is affected by about 9% on average by sea-salt aerosols. M-BC values derived by COSMOS (M-BC (COSMOS)) using a MAC value obtained by our previous studies agreed to within 9% with elemental carbon concentrations at Barrow measured over 11months. b(abs) (PSAP) was higher than b(abs) (COSMOS), by 22% at Barrow (PM1) and by 43% at Ny-angstrom lesund (PM10), presumably due to the contribution of volatile aerosol species to b(abs) (PSAP). Using b(abs) (COSMOS) as a reference, we derived M-BC (PSAP) from b(abs) (PSAP) measured since 1998. We also established the seasonal variations of M-BC at these sites. Seasonally averaged M-BC (PSAP) decreased at a rate of about 0.550.30ngm(-3)yr(-1). We also compared M-BC (COSMOS) and scaled M-BC (PSAP) values with previously reported data and evaluated the degree of inconsistency in the previous data.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- black carbon
- Arctic
- light absorption
- COSMOS
- PSAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Sinha, P. R.
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Kondo, Y.
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Koike, M.
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Ogren, J. A.
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Jefferson, A.
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Barrett, T. E.
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show more...
-
Sheesley, R. J.
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Ohata, S.
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Moteki, N.
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Coe, H.
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Liu, D.
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Irwin, M.
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Tunved, Peter
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Quinn, P. K.
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Zhao, Y.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Journal of Geoph ...
- By the university
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Stockholm University