Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events
High-time-resolution measurements of in situ aerosol and cloud properties provide the ability to study regional atmospheric processes that occur on timescales of minutes to hours. However, one limitation to this approach is that continuous measurements often include periods when the data collected a...
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Online Access: | http://www.osti.gov/servlets/purl/1657140 https://www.osti.gov/biblio/1657140 https://doi.org/10.5194/acp-20-7553-2020 |
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ftosti:oai:osti.gov:1657140 2023-07-30T04:05:23+02:00 Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events Gallo, Francesca Uin, Janek Springston, Stephen Wang, Jian Zheng, Guangjie Kuang, Chongai Wood, Robert Azevedo, Eduardo B. McComiskey, Allison Mei, Fan Theisen, Adam Kyrouac, Jenni Aiken, Allison C. 2020-12-14 application/pdf http://www.osti.gov/servlets/purl/1657140 https://www.osti.gov/biblio/1657140 https://doi.org/10.5194/acp-20-7553-2020 unknown http://www.osti.gov/servlets/purl/1657140 https://www.osti.gov/biblio/1657140 https://doi.org/10.5194/acp-20-7553-2020 doi:10.5194/acp-20-7553-2020 54 ENVIRONMENTAL SCIENCES 2020 ftosti https://doi.org/10.5194/acp-20-7553-2020 2023-07-11T09:46:25Z High-time-resolution measurements of in situ aerosol and cloud properties provide the ability to study regional atmospheric processes that occur on timescales of minutes to hours. However, one limitation to this approach is that continuous measurements often include periods when the data collected are not representative of the regional aerosol. Even at remote locations, submicron aerosols are pervasive in the ambient atmosphere with many sources. Therefore, periods dominated by local aerosol should be identified before conducting subsequent analyses to understand aerosol regional processes and aerosol–cloud interactions. Here, we present a novel method to validate the identification of regional baseline aerosol data by applying a mathematical algorithm to the data collected at the U.S. Department of Energy's (DOE) Atmospheric Radiation Measurement (ARM) user facility in the eastern North Atlantic (ENA). The ENA central facility (C1) includes an aerosol observing system (AOS) for the measurement of aerosol physical, optical, and chemical properties at time resolutions from seconds to minutes. A second temporary supplementary facility (S1), located ~0.75 km from C1, was deployed for ~1 year during the Aerosol and Cloud Experiments (ACE-ENA) campaign in 2017. First, we investigate the local aerosol at both locations. We associate periods of high submicron number concentration (N tot ) in the fine-mode condensation particle counter (CPC) and size distributions from the Ultra-High Sensitivity Aerosol Spectrometer (UHSAS) as a function of wind direction using a meteorology sensor with local sources. Elevated concentrations of Aitken-mode (<100 nm diameter) particles were observed in correspondence with the wind directions associated with airport operations. At ENA, the Graciosa Airport and its associated activities were found to be the main sources of high-concentration aerosol events at ENA, causing peaks in 1 min N tot that exceeded 8000 and 10,000 cm -3 at C1, in summer and winter, respectively, and 5000 cm -3 ... Other/Unknown Material North Atlantic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Atmospheric Chemistry and Physics 20 12 7553 7573 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES Gallo, Francesca Uin, Janek Springston, Stephen Wang, Jian Zheng, Guangjie Kuang, Chongai Wood, Robert Azevedo, Eduardo B. McComiskey, Allison Mei, Fan Theisen, Adam Kyrouac, Jenni Aiken, Allison C. Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
topic_facet |
54 ENVIRONMENTAL SCIENCES |
description |
High-time-resolution measurements of in situ aerosol and cloud properties provide the ability to study regional atmospheric processes that occur on timescales of minutes to hours. However, one limitation to this approach is that continuous measurements often include periods when the data collected are not representative of the regional aerosol. Even at remote locations, submicron aerosols are pervasive in the ambient atmosphere with many sources. Therefore, periods dominated by local aerosol should be identified before conducting subsequent analyses to understand aerosol regional processes and aerosol–cloud interactions. Here, we present a novel method to validate the identification of regional baseline aerosol data by applying a mathematical algorithm to the data collected at the U.S. Department of Energy's (DOE) Atmospheric Radiation Measurement (ARM) user facility in the eastern North Atlantic (ENA). The ENA central facility (C1) includes an aerosol observing system (AOS) for the measurement of aerosol physical, optical, and chemical properties at time resolutions from seconds to minutes. A second temporary supplementary facility (S1), located ~0.75 km from C1, was deployed for ~1 year during the Aerosol and Cloud Experiments (ACE-ENA) campaign in 2017. First, we investigate the local aerosol at both locations. We associate periods of high submicron number concentration (N tot ) in the fine-mode condensation particle counter (CPC) and size distributions from the Ultra-High Sensitivity Aerosol Spectrometer (UHSAS) as a function of wind direction using a meteorology sensor with local sources. Elevated concentrations of Aitken-mode (<100 nm diameter) particles were observed in correspondence with the wind directions associated with airport operations. At ENA, the Graciosa Airport and its associated activities were found to be the main sources of high-concentration aerosol events at ENA, causing peaks in 1 min N tot that exceeded 8000 and 10,000 cm -3 at C1, in summer and winter, respectively, and 5000 cm -3 ... |
author |
Gallo, Francesca Uin, Janek Springston, Stephen Wang, Jian Zheng, Guangjie Kuang, Chongai Wood, Robert Azevedo, Eduardo B. McComiskey, Allison Mei, Fan Theisen, Adam Kyrouac, Jenni Aiken, Allison C. |
author_facet |
Gallo, Francesca Uin, Janek Springston, Stephen Wang, Jian Zheng, Guangjie Kuang, Chongai Wood, Robert Azevedo, Eduardo B. McComiskey, Allison Mei, Fan Theisen, Adam Kyrouac, Jenni Aiken, Allison C. |
author_sort |
Gallo, Francesca |
title |
Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
title_short |
Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
title_full |
Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
title_fullStr |
Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
title_full_unstemmed |
Identifying a regional aerosol baseline in the eastern North Atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
title_sort |
identifying a regional aerosol baseline in the eastern north atlantic using collocated measurements and a mathematical algorithm to mask high-submicron-number-concentration aerosol events |
publishDate |
2020 |
url |
http://www.osti.gov/servlets/purl/1657140 https://www.osti.gov/biblio/1657140 https://doi.org/10.5194/acp-20-7553-2020 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken |
geographic_facet |
Aitken |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.osti.gov/servlets/purl/1657140 https://www.osti.gov/biblio/1657140 https://doi.org/10.5194/acp-20-7553-2020 doi:10.5194/acp-20-7553-2020 |
op_doi |
https://doi.org/10.5194/acp-20-7553-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
12 |
container_start_page |
7553 |
op_container_end_page |
7573 |
_version_ |
1772817253939544064 |