Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties
The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. In this paper, we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to...
Published in: | Geophysical Research Letters |
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Online Access: | http://www.osti.gov/servlets/purl/1454934 https://www.osti.gov/biblio/1454934 https://doi.org/10.1002/2014GL062404 |
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ftosti:oai:osti.gov:1454934 2023-07-30T04:05:25+02:00 Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties China, Swarup Scarnato, Barbara Owen, Robert C. Zhang, Bo Ampadu, Marian T. Kumar, Sumit Dzepina, Katja Dziobak, Michael P. Fialho, Paulo Perlinger, Judith A. Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn R. Mazzoleni, Claudio 2022-03-30 application/pdf http://www.osti.gov/servlets/purl/1454934 https://www.osti.gov/biblio/1454934 https://doi.org/10.1002/2014GL062404 unknown http://www.osti.gov/servlets/purl/1454934 https://www.osti.gov/biblio/1454934 https://doi.org/10.1002/2014GL062404 doi:10.1002/2014GL062404 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 2022 ftosti https://doi.org/10.1002/2014GL062404 2023-07-11T09:27:15Z The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. In this paper, we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remote Pico Mountain Observatory in the Azores in the North Atlantic. Approximately 70% of the soot particles were highly compact and of those 26% were thinly coated. Discrete dipole approximation simulations indicate that this compaction results in an increase in soot single scattering albedo by a factor of ≤2.17. The top of the atmosphere direct radiative forcing is typically smaller for highly compact than mass-equivalent lacy soot. Lastly, the forcing estimated using Mie theory is within 12% of the forcing estimated using the discrete dipole approximation for a high surface albedo, implying that Mie calculations may provide a reasonable approximation for compact soot above remote marine clouds. Other/Unknown Material North Atlantic SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Geophysical Research Letters 42 4 1243 1250 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES China, Swarup Scarnato, Barbara Owen, Robert C. Zhang, Bo Ampadu, Marian T. Kumar, Sumit Dzepina, Katja Dziobak, Michael P. Fialho, Paulo Perlinger, Judith A. Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn R. Mazzoleni, Claudio Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
topic_facet |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
description |
The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. In this paper, we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remote Pico Mountain Observatory in the Azores in the North Atlantic. Approximately 70% of the soot particles were highly compact and of those 26% were thinly coated. Discrete dipole approximation simulations indicate that this compaction results in an increase in soot single scattering albedo by a factor of ≤2.17. The top of the atmosphere direct radiative forcing is typically smaller for highly compact than mass-equivalent lacy soot. Lastly, the forcing estimated using Mie theory is within 12% of the forcing estimated using the discrete dipole approximation for a high surface albedo, implying that Mie calculations may provide a reasonable approximation for compact soot above remote marine clouds. |
author |
China, Swarup Scarnato, Barbara Owen, Robert C. Zhang, Bo Ampadu, Marian T. Kumar, Sumit Dzepina, Katja Dziobak, Michael P. Fialho, Paulo Perlinger, Judith A. Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn R. Mazzoleni, Claudio |
author_facet |
China, Swarup Scarnato, Barbara Owen, Robert C. Zhang, Bo Ampadu, Marian T. Kumar, Sumit Dzepina, Katja Dziobak, Michael P. Fialho, Paulo Perlinger, Judith A. Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn R. Mazzoleni, Claudio |
author_sort |
China, Swarup |
title |
Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
title_short |
Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
title_full |
Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
title_fullStr |
Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
title_full_unstemmed |
Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
title_sort |
morphology and mixing state of aged soot particles at a remote marine free troposphere site: implications for optical properties |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1454934 https://www.osti.gov/biblio/1454934 https://doi.org/10.1002/2014GL062404 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://www.osti.gov/servlets/purl/1454934 https://www.osti.gov/biblio/1454934 https://doi.org/10.1002/2014GL062404 doi:10.1002/2014GL062404 |
op_doi |
https://doi.org/10.1002/2014GL062404 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
4 |
container_start_page |
1243 |
op_container_end_page |
1250 |
_version_ |
1772817305506414592 |