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. Here we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remot...
Published in: | Geophysical Research Letters |
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ftmichigantuniv:oai:digitalcommons.mtu.edu:michigantech-p-22646 2023-05-15T17:33:00+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 Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn Mazzoleni, Claudio 2015-02-28T08:00:00Z https://digitalcommons.mtu.edu/michigantech-p/3344 https://doi.org/10.1002/2014GL062404 unknown Digital Commons @ Michigan Tech https://digitalcommons.mtu.edu/michigantech-p/3344 https://doi.org/10.1002/2014GL062404 Michigan Tech Publications free troposphere long-range transport morphology soot Atmospheric Sciences Department of Physics Physical Sciences and Mathematics Physics text 2015 ftmichigantuniv https://doi.org/10.1002/2014GL062404 2022-01-23T10:53:20Z The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. Here 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. 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. Text North Atlantic Michigan Technological University: Digital Commons @ Michigan Tech Geophysical Research Letters 42 4 1243 1250 |
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Michigan Technological University: Digital Commons @ Michigan Tech |
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unknown |
topic |
free troposphere long-range transport morphology soot Atmospheric Sciences Department of Physics Physical Sciences and Mathematics Physics |
spellingShingle |
free troposphere long-range transport morphology soot Atmospheric Sciences Department of Physics Physical Sciences and Mathematics Physics China, Swarup Scarnato, Barbara Owen, Robert C. Zhang, Bo Ampadu, Marian T. Kumar, Sumit Dzepina, Katja Dziobak, Michael P. Fialho, Paulo Perlinger, Judith Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn Mazzoleni, Claudio Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties |
topic_facet |
free troposphere long-range transport morphology soot Atmospheric Sciences Department of Physics Physical Sciences and Mathematics Physics |
description |
The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. Here 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. 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. |
format |
Text |
author |
China, Swarup Scarnato, Barbara Owen, Robert C. Zhang, Bo Ampadu, Marian T. Kumar, Sumit Dzepina, Katja Dziobak, Michael P. Fialho, Paulo Perlinger, Judith Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn 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 Hueber, Jacques Helmig, Detlev Mazzoleni, Lynn 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 |
publisher |
Digital Commons @ Michigan Tech |
publishDate |
2015 |
url |
https://digitalcommons.mtu.edu/michigantech-p/3344 https://doi.org/10.1002/2014GL062404 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Michigan Tech Publications |
op_relation |
https://digitalcommons.mtu.edu/michigantech-p/3344 https://doi.org/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_ |
1766131339367546880 |