Rahul A. Zaveri, Pacific Northwest National Laboratory
William J. Shaw, Pacific Northwest National Laboratory
Daniel J. Cziczo, Massachusetts Institute of Technology
Beat Schmid, Pacific Northwest National Laboratory
Richard Ferrare, NASA Langley Research Center
M. Lizabeth Alexander, Pacific Northwest National Laboratory
Raul Alvarez, NOAA Earth System Research Laboratory
W. Patrick Arnott, Desert Research Institute
Dean B. Atkinson, Portland State UniversityFollow
Sunil Baidar, University of Colorado Boulder
Robert M. Banta, NOAA Earth System Research Laboratory
James Barnard, Pacific Northwest National Laboratory
Josef Beranek, Pacific Northwest National Laboratory
Larry K. Berg, Pacific Northwest National Laboratory
Fred Brechtel, Brechtel Manufactoring, Inc.
W. Alan Brewer, NOAA Earth System Research Laboratory
John F. Cahill, University of California - San Diego
Brian Cairns, NASA Goddard Institute for Space Studies
Christopher D. Cappa, University of California - Davis
D. Chand, Pacific Northwest National Laboratory
S. China, Los Alamos National LaboratoryFollow
Jennifer M. Comstock, Pacific Northwest National Laboratory
Manvendra K. Dubey, Los Alamos National Laboratory
Robert C. Easter, Pacific Northwest National Laboratory
M. H. Erickson, Washington State University
Jerome Fast, Pacific Northwest National Laboratory
Cody Floerchinger, Montana State University - Bozeman
B. Flowers, Los Alamos National Laboratory
Edward C. Fortner, Aerodyne Research, Inc.
Jeffrey S. Gaffney, University of Arkansas - Main Campus
Mary K. Gilles, Lawrence Berkeley National Laboratory
Kyle Gorkowski, Carnegie Mellon University
William Gustafson, Pacific Northwest National Laboratory
Madhu Gyawali, University of Nevada - Reno
J. Hair, University of Nevada - Reno
R. M. Hardesty, NOAA Earth System Research Laboratory
Joseph Harworth, Portland State University
Scott C. Herndon, Aerodyne Research, Inc.
Naruki Hiranuma, Pacific Northwest National Laboratory
Chris Hostetler, NASA Langley Research Center
John M. Hubbe, Pacific Northwest National Laboratory
John T. Jayne, Aerodyne Research, Inc
H. Jeong, University of North Dakota
B. Tom Jobson, Washington State University
Evgueni Kassianov, Pacific Northwest National Laboratory
Lawrence I. Kleinman, Brookhaven National Laboratory
C. Kluzek, Pacific Northwest National Laboratory
W. Berk Knighton, Montana State University - Bozeman
Katheryn R. Kolesar, University of California - Davis
Chongai Kuang, Brookhaven National Laboratory
Alena Kubátová, University of North Dakota
Andrew O. Langford, NOAA Earth System Research Laboratory
Alexander Laskin, Pacific Northwest National Laboratory
N. Laulainen, Pacific Northwest National Laboratory
Richard D. Marchbanks, NOAA Earth System Research Laboratory
Claudio Mazzoleni, Michigan Technological University
Fan Mei, Brookhaven National Laboratory
Ryan C. Moffet, University of the Pacific
Dan Nelson, Pacific Northwest National Laboratory
Michael Obland, NASA Langley Research Center
Hilke Oetjen, University of Colorado Boulder
Timothy B. Onasch, Aerodyne Research, Inc
I. Ortega, University of Colorado Boulder
Matteo Ottaviani, NASA Goddard Institute for Space Studies
Mikhail Pekour, Pacific Northwest National Laboratory
Kimberly A. Prather, University of California - San Diego
James Gregory Radney, Portland State University
Raymond R. Rogers, NASA Langley Research Center
Scott P. Sandberg, NOAA Earth System Research Laboratory
Arthur J. Sedlacek, Brookhaven National Laboratory
Christoph J. Senff, NOAA Earth System Research Laboratory
Gunnar I. Senum, Brookhaven National Laboratory
Ari Setyan, University of California - Davis
John E. Shilling, Pacific Northwest National Laboratory
ManishKumar Shrivastava, Pacific Northwest National Laboratory
C. Song, Pacific Northwest National Laboratory
Stephen R. Springston, Brookhaven National Laboratory
R. Subramanian, Droplet Measurements Technologies
Kaitlyn Suski, University of California - San Diego
Jason Tomlinson, Pacific Northwest National Laboratory
Rainer M. Volkamer, University of Colorado Boulder
H. W. Wallace, Washington State University
Jian Wang, Brookhaven National Laboratory
A. M. Weickmann, NOAA Earth System Research Laboratory
Douglas R. Worsnop, Aerodyne Research, Inc.
Xiao-Ying Yu, Pacific Northwest National Laboratory
Alla Zelenyuk, Pacific Northwest National Laboratory
Qi Zhang, University of California - Davis

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Atmospheric Chemistry and Physics

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Atmospheric aerosols -- Composition -- Analysis, Atmospheric aerosols -- Spectra -- Measurement, Air -- Pollution, Carbon -- Environmental aspects


Substantial uncertainties still exist in the scientific understanding of the possible interactions between urban and natural (biogenic) emissions in the production and transformation of atmospheric aerosol and the resulting impact on climate change. The US Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) program’s Carbonaceous Aerosol and Radiative Effects Study (CARES) carried out in June 2010 in Central Valley, California, was a comprehensive effort designed to improve this understanding. The primary objective of the field study was to investigate the evolution of secondary organic and black carbon aerosols and their climate-related properties in the Sacramento urban plume as it was routinely transported into the forested Sierra Nevada foothills area. Urban aerosols and trace gases experienced significant physical and chemical transformations as they mixed with the reactive biogenic hydrocarbons emitted from the forest. Two heavily-instrumented ground sites – one within the Sacramento urban area and another about 40 km to the northeast in the foothills area – were set up to characterize the evolution of meteorological variables, trace gases, aerosol precursors, aerosol size, composition, and climate related properties in freshly polluted and “aged” urban air. On selected days, the DOE G-1 aircraft was deployed to make similar measurements upwind and across the evolving Sacramento plume in the morning and again in the afternoon. The NASA B-200 aircraft, carrying remote sensing instruments, was also deployed to characterize the vertical and horizontal distribution of aerosols and aerosol optical properties within and around the plume. This overview provides: (a) the scientific background and motivation for the study, (b) the operational and logistical information pertinent to the execution of the study, (c) an overview of key observations and initial findings from the aircraft and ground-based sampling platforms, and (d) a roadmap of planned data analyses and focused modeling efforts that will facilitate the integration of new knowledge into improved representations of key aerosol processes and properties in climate models.


© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.

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