Show simple item record

dc.contributor.author
Leaitch, W.R.
dc.contributor.author
Lohmann, Ulrike
dc.contributor.author
Russell, Lynn M.
dc.contributor.author
Garrett, Timothy
dc.contributor.author
Shantz, N.C.
dc.contributor.author
Toom-Sauntry, Desiree
dc.contributor.author
Strapp, J.W.
dc.contributor.author
Hayden, Katherine L.
dc.contributor.author
Marshall, Julia
dc.contributor.author
Wolde, Mengistu
dc.contributor.author
Worsnop, Douglas R.
dc.contributor.author
Jayne, John T.
dc.date.accessioned
2018-09-20T14:18:49Z
dc.date.available
2017-06-09T05:23:58Z
dc.date.available
2018-09-20T14:18:49Z
dc.date.issued
2010
dc.identifier.issn
1680-7375
dc.identifier.issn
1680-7367
dc.identifier.other
10.5194/acp-10-7669-2010
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/22281
dc.identifier.doi
10.3929/ethz-b-000022281
dc.description.abstract
Airborne measurements from two consecutive days, analysed with the aid of an aerosol-adiabatic cloud parcel model, are used to study the effect of carbonaceous aerosol particles on the reflectivity of sunlight by water clouds. The measurements, including aerosol chemistry, aerosol microphysics, cloud microphysics, cloud gust velocities and cloud light extinction, were made below, in and above stratocumulus over the northwest Atlantic Ocean. On the first day, the history of the below-cloud fine particle aerosol was marine and the fine particle sulphate and organic carbon mass concentrations measured at cloud base were 2.4 μg m−3 and 0.9 μg m−3 respectively. On the second day, the below-cloud aerosol was continentally influenced and the fine particle sulphate and organic carbon mass concentrations were 2.3 μg m−3 and 2.6 μg m−3 respectively. Over the range 0.06–0.8 μm diameter, the shapes of the below-cloud size distributions were similar on both days and the number concentrations were approximately a factor of two higher on the second day. The cloud droplet number concentrations (CDNC) on the second day were approximately three times higher than the CDNC measured on the first day. Using the parcel model to separate the influence of the differences in gust velocities, we estimate from the vertically integrated cloud light scattering measurements a 6% increase in the cloud albedo principally due to the increase in the carbonaceous components on the second day. Assuming no additional absorption by this aerosol, a 6% albedo increase translates to a local daytime radiative cooling of ∼12 W m−2. This result provides observational evidence that the role of anthropogenic carbonaceous components in the cloud albedo effect can be much larger than that of anthropogenic sulphate, as some global simulations have indicated.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
European Geophysical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Cloud albedo increase from carbonaceous aerosol
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2010-08-18
ethz.journal.title
Atmospheric Chemistry and Physics
ethz.journal.volume
10
en_US
ethz.journal.issue
16
en_US
ethz.journal.abbreviated
Atmos. chem. phys.
ethz.pages.start
7669
en_US
ethz.pages.end
7684
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
004294181
ethz.publication.place
Munich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03690 - Lohmann, Ulrike / Lohmann, Ulrike
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03690 - Lohmann, Ulrike / Lohmann, Ulrike
ethz.date.deposited
2017-06-09T05:24:16Z
ethz.source
ECIT
ethz.identifier.importid
imp59364cfc9e17385909
ethz.ecitpid
pub:37102
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-15T08:32:15Z
ethz.rosetta.lastUpdated
2023-02-06T15:54:09Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Cloud%20albedo%20increase%20from%20carbonaceous%20aerosol&rft.jtitle=Atmospheric%20Chemistry%20and%20Physics&rft.date=2010&rft.volume=10&rft.issue=16&rft.spage=7669&rft.epage=7684&rft.issn=1680-7375&1680-7367&rft.au=Leaitch,%20W.R.&Lohmann,%20Ulrike&Russell,%20Lynn%20M.&Garrett,%20Timothy&Shantz,%20N.C.&rft.genre=article&rft_id=info:doi/10.5194/acp-10-7669-2010&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record