Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes
The aging of refractory black carbon (rBC) aerosol by sulfate-driven chemistry has been constrained in coal-fired power-plant plumes using the NOAA WP-3D research aircraft during the Southern Nexus (SENEX) study, which took place in the Southeastern US in June and July of 2013. A Single Particle Soo...
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| Format: | Journal article |
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AIMS Press
2018
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| _version_ | 1826305914905296896 |
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| author | Markovic, MZ Perring, AE Gao, RS Liau, J Welti, A Wagner, NL Pollack, IB Middlebrook, AM Ryerson, TB Trainer, MK Warneke, C de Gouw, JA Fahey, DW Stier, P Schwarz, JP |
| author_facet | Markovic, MZ Perring, AE Gao, RS Liau, J Welti, A Wagner, NL Pollack, IB Middlebrook, AM Ryerson, TB Trainer, MK Warneke, C de Gouw, JA Fahey, DW Stier, P Schwarz, JP |
| author_sort | Markovic, MZ |
| collection | OXFORD |
| description | The aging of refractory black carbon (rBC) aerosol by sulfate-driven chemistry has been constrained in coal-fired power-plant plumes using the NOAA WP-3D research aircraft during the Southern Nexus (SENEX) study, which took place in the Southeastern US in June and July of 2013. A Single Particle Soot Photometer (SP2) determined the microphysical properties of rBC-containing particles including single-particle rBC mass and the presence and amount of internally-mixed non-rBC material, hereafter referred to as “coatings”. Most power-plant influenced air was associated with very slightly increased amounts of non-refractory material, likely sulfate internally mixed with the rBC, however this increase was statistically insignificant even after semi-Lagrangian exposure for up to 5 h. On average, the increase in coating thickness was 2 ± 4 nm for particles containing 3–5 fg rBC. Similarly, the number fraction of rBC-containing particles that could be identified as internally mixed was increased by plume chemistry by only 1.3 ± 1.3%. These direct measurements of microphysical aging of rBC-containing aerosol by power plant emissions constrain the enhancement of sulfate chemistry on both rBC’s column-integrated absorption optical depth, and rBC-containing aerosol’s ability to act as cloud condensation nuclei. Appling Mie and k-Köhler theories to the SP2 observations, permits the resulting effect on rBC ambient light-absorption to be capped at the 2–6% level. |
| first_indexed | 2024-03-07T06:40:03Z |
| format | Journal article |
| id | oxford-uuid:f8f25904-2537-46bf-a91f-6e2cf790b787 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:40:03Z |
| publishDate | 2018 |
| publisher | AIMS Press |
| record_format | dspace |
| spelling | oxford-uuid:f8f25904-2537-46bf-a91f-6e2cf790b7872022-03-27T12:54:26ZLimited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f8f25904-2537-46bf-a91f-6e2cf790b787Symplectic Elements at OxfordAIMS Press2018Markovic, MZPerring, AEGao, RSLiau, JWelti, AWagner, NLPollack, IBMiddlebrook, AMRyerson, TBTrainer, MKWarneke, Cde Gouw, JAFahey, DWStier, PSchwarz, JPThe aging of refractory black carbon (rBC) aerosol by sulfate-driven chemistry has been constrained in coal-fired power-plant plumes using the NOAA WP-3D research aircraft during the Southern Nexus (SENEX) study, which took place in the Southeastern US in June and July of 2013. A Single Particle Soot Photometer (SP2) determined the microphysical properties of rBC-containing particles including single-particle rBC mass and the presence and amount of internally-mixed non-rBC material, hereafter referred to as “coatings”. Most power-plant influenced air was associated with very slightly increased amounts of non-refractory material, likely sulfate internally mixed with the rBC, however this increase was statistically insignificant even after semi-Lagrangian exposure for up to 5 h. On average, the increase in coating thickness was 2 ± 4 nm for particles containing 3–5 fg rBC. Similarly, the number fraction of rBC-containing particles that could be identified as internally mixed was increased by plume chemistry by only 1.3 ± 1.3%. These direct measurements of microphysical aging of rBC-containing aerosol by power plant emissions constrain the enhancement of sulfate chemistry on both rBC’s column-integrated absorption optical depth, and rBC-containing aerosol’s ability to act as cloud condensation nuclei. Appling Mie and k-Köhler theories to the SP2 observations, permits the resulting effect on rBC ambient light-absorption to be capped at the 2–6% level. |
| spellingShingle | Markovic, MZ Perring, AE Gao, RS Liau, J Welti, A Wagner, NL Pollack, IB Middlebrook, AM Ryerson, TB Trainer, MK Warneke, C de Gouw, JA Fahey, DW Stier, P Schwarz, JP Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes |
| title | Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes |
| title_full | Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes |
| title_fullStr | Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes |
| title_full_unstemmed | Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes |
| title_short | Limited impact of sulfate-driven chemistry on black carbon aerosol aging in power plant plumes |
| title_sort | limited impact of sulfate driven chemistry on black carbon aerosol aging in power plant plumes |
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