Measurements and Modeling of Black-Carbon Aerosols in the Arctic.
We have made the first continuous measurements of black carbon in Barrow, Alaska at the ARM aerosol- observing site at the NOAA Barrow Observatory using a Single-Particle Soot Photometer (SP2). These data demonstrate that BC particles are extremely small, and a majority of the particles (by number d...
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ftosti:oai:osti.gov:1562413 2023-07-30T04:01:45+02:00 Measurements and Modeling of Black-Carbon Aerosols in the Arctic. Bambha, Ray LaFranchi, Brian Schrader, Paul E. Lucero, Daniel A. Ivey, Mark D. Michelsen, Hope A. 2019-09-23 application/pdf http://www.osti.gov/servlets/purl/1562413 https://www.osti.gov/biblio/1562413 https://doi.org/10.2172/1562413 unknown http://www.osti.gov/servlets/purl/1562413 https://www.osti.gov/biblio/1562413 https://doi.org/10.2172/1562413 doi:10.2172/1562413 2019 ftosti https://doi.org/10.2172/1562413 2023-07-11T09:36:53Z We have made the first continuous measurements of black carbon in Barrow, Alaska at the ARM aerosol- observing site at the NOAA Barrow Observatory using a Single-Particle Soot Photometer (SP2). These data demonstrate that BC particles are extremely small, and a majority of the particles (by number density) are smaller than 0.5 fg, the lower limit of reliability of the SP2. We developed the first numerical model capable of quantitatively reproducing the laser-induced incandescence (LII) and scattering signals produced by the SP2, the industry-standard BC instrument. Our model reproduces the SP2 signal temporally and spectrally and demonstrates that the current SP2 optical design allows substantial contamination of LII on the scattering signal. We ran CAM5-SE in nudged mode, i.e., by constraining the transport used in the model with meteorological data. The results demonstrate the problem observed previously of under-predicting BC at high latitudes. The cause of the discrepancy is currently unknown, but we suspect that it is associated with scavenging and rainout mechanisms. Other/Unknown Material Arctic Barrow black carbon Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
description |
We have made the first continuous measurements of black carbon in Barrow, Alaska at the ARM aerosol- observing site at the NOAA Barrow Observatory using a Single-Particle Soot Photometer (SP2). These data demonstrate that BC particles are extremely small, and a majority of the particles (by number density) are smaller than 0.5 fg, the lower limit of reliability of the SP2. We developed the first numerical model capable of quantitatively reproducing the laser-induced incandescence (LII) and scattering signals produced by the SP2, the industry-standard BC instrument. Our model reproduces the SP2 signal temporally and spectrally and demonstrates that the current SP2 optical design allows substantial contamination of LII on the scattering signal. We ran CAM5-SE in nudged mode, i.e., by constraining the transport used in the model with meteorological data. The results demonstrate the problem observed previously of under-predicting BC at high latitudes. The cause of the discrepancy is currently unknown, but we suspect that it is associated with scavenging and rainout mechanisms. |
author |
Bambha, Ray LaFranchi, Brian Schrader, Paul E. Lucero, Daniel A. Ivey, Mark D. Michelsen, Hope A. |
spellingShingle |
Bambha, Ray LaFranchi, Brian Schrader, Paul E. Lucero, Daniel A. Ivey, Mark D. Michelsen, Hope A. Measurements and Modeling of Black-Carbon Aerosols in the Arctic. |
author_facet |
Bambha, Ray LaFranchi, Brian Schrader, Paul E. Lucero, Daniel A. Ivey, Mark D. Michelsen, Hope A. |
author_sort |
Bambha, Ray |
title |
Measurements and Modeling of Black-Carbon Aerosols in the Arctic. |
title_short |
Measurements and Modeling of Black-Carbon Aerosols in the Arctic. |
title_full |
Measurements and Modeling of Black-Carbon Aerosols in the Arctic. |
title_fullStr |
Measurements and Modeling of Black-Carbon Aerosols in the Arctic. |
title_full_unstemmed |
Measurements and Modeling of Black-Carbon Aerosols in the Arctic. |
title_sort |
measurements and modeling of black-carbon aerosols in the arctic. |
publishDate |
2019 |
url |
http://www.osti.gov/servlets/purl/1562413 https://www.osti.gov/biblio/1562413 https://doi.org/10.2172/1562413 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow black carbon Alaska |
genre_facet |
Arctic Barrow black carbon Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1562413 https://www.osti.gov/biblio/1562413 https://doi.org/10.2172/1562413 doi:10.2172/1562413 |
op_doi |
https://doi.org/10.2172/1562413 |
_version_ |
1772812517295259648 |