Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources
Free tropospheric aerosol particles have important but poorly constrained climate effects due to transformations of their physicochemical properties during long-range transport. In this study, we investigated the chemical composition and provided an overview of the phase state of individual particle...
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Online Access: | http://www.osti.gov/servlets/purl/1886809 https://www.osti.gov/biblio/1886809 https://doi.org/10.5194/acp-22-9033-2022 |
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ftosti:oai:osti.gov:1886809 2023-07-30T04:05:17+02:00 Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources Cheng, Zezhen Morgenstern, Megan E. Zhang, Bo Fraund, Matthew Lata, Nurun Nahar Brimberry, Rhenton Marcus, Matthew A. Mazzoleni, Lynn Fialho, Paulo Henning, Silvia Wehner, Birgit Mazzoleni, Claudio China, Swarup 2023-03-01 application/pdf http://www.osti.gov/servlets/purl/1886809 https://www.osti.gov/biblio/1886809 https://doi.org/10.5194/acp-22-9033-2022 unknown http://www.osti.gov/servlets/purl/1886809 https://www.osti.gov/biblio/1886809 https://doi.org/10.5194/acp-22-9033-2022 doi:10.5194/acp-22-9033-2022 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY 2023 ftosti https://doi.org/10.5194/acp-22-9033-2022 2023-07-11T10:14:45Z Free tropospheric aerosol particles have important but poorly constrained climate effects due to transformations of their physicochemical properties during long-range transport. In this study, we investigated the chemical composition and provided an overview of the phase state of individual particles that have been long-range transported over the North Atlantic Ocean in June and July 2014, 2015, and 2017 to the Observatory of Mount Pico (OMP), in the Azores. OMP is an ideal site for studying long-range transported free tropospheric particles with negligible influence from local emissions and rare contributions from the boundary layer. We used the FLEXible PARTicle Lagrangian particle dispersion model (FLEXPART) to determine the origin and transport trajectories of sampled air masses and found that most originated from North America and recirculated over the North Atlantic Ocean. The FLEXPART analysis show that the sampled air masses were highly aged (average plume age >10 days). Size-resolved chemical compositions of individual particles were probed using computer-controlled scanning electron microscopy with an energy dispersive X-ray spectrometer (CCSEM-EDX) and scanning transmission X-ray microscopy with near-edge X-ray absorption fine structure spectroscopy (STXM-NEXAFS). CCSEM-EDX results show that the most abundant particle types were carbonaceous (~29.9 to 82.0 %), sea salt (~0.3 to 31.6 %), and sea salt with sulfate (~2.4 to 31.5 %). We used a tilted stage interfaced within an Environmental Scanning Electron Microscope (ESEM) to determine the phase state of individual submicron particles. We found that most particles (~47 to 99 %) were in the liquid state at the time of collection due to inorganic inclusions. Moreover, we also observed a substantial fraction of solid and semisolid particles (~0 to 30 % and ~1 to 42 %, respectively) during different transport patterns/events, reflecting the particles’ phase state variability for different atmospheric transport events and sources. Combining phase state ... Other/Unknown Material North Atlantic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Mount Pico ENVELOPE(-62.450,-62.450,-64.167,-64.167) Atmospheric Chemistry and Physics 22 13 9033 9057 |
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 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY |
spellingShingle |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY Cheng, Zezhen Morgenstern, Megan E. Zhang, Bo Fraund, Matthew Lata, Nurun Nahar Brimberry, Rhenton Marcus, Matthew A. Mazzoleni, Lynn Fialho, Paulo Henning, Silvia Wehner, Birgit Mazzoleni, Claudio China, Swarup Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
topic_facet |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 37 INORGANIC ORGANIC PHYSICAL AND ANALYTICAL CHEMISTRY |
description |
Free tropospheric aerosol particles have important but poorly constrained climate effects due to transformations of their physicochemical properties during long-range transport. In this study, we investigated the chemical composition and provided an overview of the phase state of individual particles that have been long-range transported over the North Atlantic Ocean in June and July 2014, 2015, and 2017 to the Observatory of Mount Pico (OMP), in the Azores. OMP is an ideal site for studying long-range transported free tropospheric particles with negligible influence from local emissions and rare contributions from the boundary layer. We used the FLEXible PARTicle Lagrangian particle dispersion model (FLEXPART) to determine the origin and transport trajectories of sampled air masses and found that most originated from North America and recirculated over the North Atlantic Ocean. The FLEXPART analysis show that the sampled air masses were highly aged (average plume age >10 days). Size-resolved chemical compositions of individual particles were probed using computer-controlled scanning electron microscopy with an energy dispersive X-ray spectrometer (CCSEM-EDX) and scanning transmission X-ray microscopy with near-edge X-ray absorption fine structure spectroscopy (STXM-NEXAFS). CCSEM-EDX results show that the most abundant particle types were carbonaceous (~29.9 to 82.0 %), sea salt (~0.3 to 31.6 %), and sea salt with sulfate (~2.4 to 31.5 %). We used a tilted stage interfaced within an Environmental Scanning Electron Microscope (ESEM) to determine the phase state of individual submicron particles. We found that most particles (~47 to 99 %) were in the liquid state at the time of collection due to inorganic inclusions. Moreover, we also observed a substantial fraction of solid and semisolid particles (~0 to 30 % and ~1 to 42 %, respectively) during different transport patterns/events, reflecting the particles’ phase state variability for different atmospheric transport events and sources. Combining phase state ... |
author |
Cheng, Zezhen Morgenstern, Megan E. Zhang, Bo Fraund, Matthew Lata, Nurun Nahar Brimberry, Rhenton Marcus, Matthew A. Mazzoleni, Lynn Fialho, Paulo Henning, Silvia Wehner, Birgit Mazzoleni, Claudio China, Swarup |
author_facet |
Cheng, Zezhen Morgenstern, Megan E. Zhang, Bo Fraund, Matthew Lata, Nurun Nahar Brimberry, Rhenton Marcus, Matthew A. Mazzoleni, Lynn Fialho, Paulo Henning, Silvia Wehner, Birgit Mazzoleni, Claudio China, Swarup |
author_sort |
Cheng, Zezhen |
title |
Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
title_short |
Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
title_full |
Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
title_fullStr |
Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
title_full_unstemmed |
Particle phase-state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
title_sort |
particle phase-state variability in the north atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1886809 https://www.osti.gov/biblio/1886809 https://doi.org/10.5194/acp-22-9033-2022 |
long_lat |
ENVELOPE(-62.450,-62.450,-64.167,-64.167) |
geographic |
Mount Pico |
geographic_facet |
Mount Pico |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.osti.gov/servlets/purl/1886809 https://www.osti.gov/biblio/1886809 https://doi.org/10.5194/acp-22-9033-2022 doi:10.5194/acp-22-9033-2022 |
op_doi |
https://doi.org/10.5194/acp-22-9033-2022 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
22 |
container_issue |
13 |
container_start_page |
9033 |
op_container_end_page |
9057 |
_version_ |
1772817095722008576 |