Title

Indirect and semi-direct aerosol campaign: The impact of arctic aerosols on clouds

Authors

Greg M. McFarquhar, University of Illinois at Urbana-Champaign
Steven Ghan, Pacific Northwest National Laboratory
Johannes Verlinde, Pennsylvania State University
Alexei Korolev, Environment Canada
J. Walter Strapp, Environment Canada
Beat Schmid, Pacific Northwest National Laboratory
Jason M. Tomlinson, Pacific Northwest National Laboratory
Mengistu Wolde, National Research Council Canada
Sarah D. Brooks, National Research Council Canada
Dan Cziczo, Pacific Northwest National Laboratory
Manvendra K. Dubey, Los Alamos National Laboratory
Jiwen Fan, Pacific Northwest National Laboratory
Connor Flynn, Pacific Northwest National Laboratory
Ismail Gultepe, Environment Canada
John Hubbe, Pacific Northwest National Laboratory
Mary K. Gilles, Lawrence Berkeley National Laboratory
Alexander Laskin, Pacific Northwest National Laboratory
Paul Lawson, Stratton Park Engineering Company
W. Richard Leaitch, Environment Canada
Peter Liu, Environment Canada
Xiaohong Liu, Pacific Northwest National Laboratory
Dan Lubin, Scripps Institution of Oceanography
Claudio Mazzoleni, Los Alamos National Laboratory
Ann Marie MacDonald, Environment Canada
Ryan C. Moffet, Lawrence Berkeley National Laboratory
Hugh Morrison, National Center for Atmospheric Research
Mikhail Ovchinnikov, Pacific Northwest National Laboratory
Matthew D. Shupe, NOAA Earth System Research Laboratory
David D. Turner, University of Wisconsin-Madison
Shaocheng Xie, Lawrence Livermore National Laboratory
Alla Zelenyuk, Pacific Northwest National Laboratory
Kenny Bae, University of Illinois at Urbana-Champaign

Document Type

Article

Publication Date

2-1-2011

Abstract

An overview of Indirect and Semi-Direct Aerosol Campaign (ISDAC), aimed to study the impact of Arctic aerosol on clouds, is provided. The general theme of the campaign was to provide detailed observations of aerosols and clouds and gather high-quality data needed to improve the treatment of clouds and aerosols in climate models. The NRC Convair-580 was used for the in situ measurements of clouds, aerosols, and state parameters, and for active and passive remote sensing observations. The results show that ice nuclei (IN) concentrations in the Arctic are generally low, making accurate IN measurements a challenge. Many aerosol layers had horizontal and vertical filamentous structures, in which aerosol number concentration, their size distributions, and compositions varied rapidly along the flight paths.

Publication Title

Bulletin of the American Meteorological Society

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