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Single particle measurements of mid latitude black carbon and light-scattering aerosols from the boundary layer to the lower stratosphere

Schwarz, J.P. and Gao, R.S. and Fahey, D.W. and Thomson, D.S. and Watts, L.A. and Wilson, J.C. and Reeves, J.M. and Darbeheshti, M. and Baumgardner, D.G. and Kok, G.L. and Chung, S.H. and Schulz, M. and Hendricks, J. and Lauer, A. and Kärcher, B. and Slowik, J.G. and Rosenlof, K.H. and Thompson, T.L. and Langford, A.O. and Loewenstein, M. and Aikin, K.C. (2006) Single particle measurements of mid latitude black carbon and light-scattering aerosols from the boundary layer to the lower stratosphere. Journal of Geophysical Research, 111, D16207. DOI: 10.1029/2006JD007076.

Full text not available from this repository.

Official URL: http://www.agu.org/pubs/crossref/2006/2006JD007076.shtml


A single-particle soot photometer (SP2) was flown on a NASA WB-57F high-altitude research aircraft in November 2004 from Houston, Texas. The SP2 uses laser-induced incandescence to detect individual black carbon (BC) particles in an air sample in the mass range of ~3–300 fg (~0.15–0.7 μm volume equivalent diameter). Scattered light is used to size the remaining non-BC aerosols in the range of ~0.17–0.7 μm diameter. We present profiles of both aerosol types from the boundary layer to the lower stratosphere from two midlatitude flights. Results for total aerosol amounts in the size range detected by the SP2 are in good agreement with typical particle spectrometer measurements in the same region. All ambient incandescing particles were identified as BC because their incandescence properties matched those of laboratory-generated BC aerosol. Approximately 40% of these BC particles showed evidence of internal mixing (e.g., coating). Throughout profiles between 5 and 18.7 km, BC particles were less than a few percent of total aerosol number, and black carbon aerosol (BCA) mass mixing ratio showed a constant gradient with altitude above 5 km. SP2 data was compared to results from the ECHAM4/MADE and LmDzT-INCA global aerosol models. The comparison will help resolve the important systematic differences in model aerosol processes that determine BCA loadings. Further intercomparisons of models and measurements as presented here will improve the accuracy of the radiative forcing contribution from BCA.

Document Type:Article
Title:Single particle measurements of mid latitude black carbon and light-scattering aerosols from the boundary layer to the lower stratosphere
AuthorsInstitution or Email of Authors
Schwarz, J.P.NOAA ESRL, Boulder, CO, USA
Gao, R.S.NOAA ESRL, Boulder, CO, USA
Fahey, D.W.NOAA ESRL, Boulder, CO, USA
Thomson, D.S.NOAA ESRL, Boulder, CO, USA
Watts, L.A.NOAA ESRL, Boulder, CO, USA
Wilson, J.C.Univ. of Denver, Denver, CO, USA
Reeves, J.M.Univ. of Denver, Denver, CO, USA
Darbeheshti, M.Univ. of Denver, Denver, CO, USA
Baumgardner, D.G.UNAM, Mexico City, MEX
Kok, G.L.DMT, Boulder, CO, USA
Chung, S.H.NOAA ESRL, Boulder, CO, USA
Schulz, M.LSCE, Gif-sur-Yvette, F
Slowik, J.G.Boston College, MA, USA
Rosenlof, K.H.NOAA ESRL, Boulder, CO, USA
Thompson, T.L.NOAA ESRL, Boulder, CO, USA
Langford, A.O.NOAA ESRL, Boulder, CO, USA
Loewenstein, M.NASA Ames Research Center, CA, USA
Aikin, K.C.NOAA ESRL, Boulder, CO, USA
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:D16207
Keywords:Black carbon, Atmospheric measurements, Single particles
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Prof. Bernd Kärcher
Deposited On:24 Jul 2007
Last Modified:11 Nov 2014 21:56

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