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Morphology and Mixing State of Aged Soot Particles at a Remote Marine Free Troposphere Site : Implications for Optical Properties

2015Journal article Open access
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dc.contributor.authorChina, Swarup
dc.contributor.authorScarnato, Barbara
dc.contributor.authorOwen, Robert C.
dc.contributor.authorZhang, Bo
dc.contributor.authorAmpadu, Marian T.
dc.contributor.authorKumar, Sumit
dc.contributor.authorDzepina, Katja
dc.contributor.authorDziobak, Michael P.
dc.contributor.authorFialho, Paulo
dc.contributor.authorPerlinger, Judith A.
dc.contributor.authorHueber, Jacques
dc.contributor.authorHelmig, Detlev
dc.contributor.authorMazzoleni, Lynn R.
dc.contributor.authorMazzoleni, Claudio
dc.date.accessioned2018-01-19T19:06:43Z
dc.date.available2018-01-19T19:06:43Z
dc.date.issued2015
dc.date.updated2015-01-26T13:45:30Z
dc.description.abstractThe 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.en
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationChina, 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 (2015). Morphology and Mixing State of Aged Soot Particles at a Remote Marine Free Troposphere Site: Implications for Optical Properties, "Geophysical Research Letters", 42(4): 1243–1250. DOI: 10.1002/2014GL062404pt_PT
dc.identifier.doi10.1002/2014GL062404pt_PT
dc.identifier.issn1944-8007
dc.identifier.urihttp://hdl.handle.net/10400.3/4554
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAmerican Geophysical Unionpt_PT
dc.relation.publisherversionhttp://onlinelibrary.wiley.com/doi/10.1002/2014GL062404/fullpt_PT
dc.subjectSoot Particlesen
dc.subjectNanosphere Sooten
dc.subjectPico Mountain Observatoryen
dc.subjectAzores Archipelagoen
dc.titleMorphology and Mixing State of Aged Soot Particles at a Remote Marine Free Troposphere Site : Implications for Optical Propertiesen
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1250pt_PT
oaire.citation.issue(4)pt_PT
oaire.citation.startPage1243pt_PT
oaire.citation.titleGeophysical Research Lettersen
oaire.citation.volume42pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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