TY - JOUR
T1 - Smoke-impacted regional haze in California during the summer of 2002
AU - McMeeking, Gavin R.
AU - Kreidenweis, Sonia M.
AU - Lunden, Melissa
AU - Carrillo, Jacqueline
AU - Carrico, Christian M.
AU - Lee, Taehyoung
AU - Herckes, Pierre
AU - Engling, Guenter
AU - Day, Derek E.
AU - Hand, Jennifer
AU - Brown, Nancy
AU - Malm, William C.
AU - Collett, Jeffrey L.
N1 - Funding Information:
We thank Air Resource Specialists and Yosemite National Park staff for their assistance during the field study and the National Interagency Fire Center and K. Warner for national and park fire activity data. The authors gratefully acknowledge the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and READY website ( http://www.arl.noaa.gov/ready.html ) used in this publication. Data provided from AERONET #102 Fresno, California and #59 Corcoran, California are courtesy of the Multiangle Imaging SpectroRadiometer (MISR) project, in affiliation with the Jet Propulsion Laboratory, California Institute of Technology, and under contract with the National Aeronautics and Space Administration. We acknowledge the AERONET project staff at Goddard Space Flight Center for making data available. We thank the MODIS Rapid Response Project at NASA/GSFC for the MODIS image. The Fresno Supersite nephelometer data was retrieved March 2005 from the Central California Air Quality Studies’ (CCAQS) website ( http://www.arb.ca.gov/airways/ ). Fresno Supersite data were collected as part of US Environmental Protection Agency (EPA) Assistance Agreement No. R-82805701-01. Support for Yosemite NP work was provided by the National Park Service (contract #CA2380-99001 TO0356). Work at the Blodgett Forest Research Site was supported by the Assistant Secretary for Fossil Energy, Office of Natural Gas and Petroleum Technology, through the National Petroleum Technology Office under U.S. Department of Energy Contract No. DE-AC03-76SF00098 and the Independent Petroleum Association of Mountain States. We would like to acknowledge Bob Heald and the Blodgett Forest crew for operational support. Kristi Gebhart assisted with backward trajectory analyses.
PY - 2006/3/1
Y1 - 2006/3/1
N2 - Observations of aerosol physical, chemical, and optical properties made at 38 locations in Washington, Oregon, and California are presented to show the regional-scale influence of wildfire smoke during the summer of 2002. Aerosol measurements made during an intensive field campaign conducted in July, August, and September 2002 in Yosemite National Park indicated that smoke-impacted aerosols were present at the park during frequent haze episodes. In addition, backward trajectory analyses showed that large-scale meteorological conditions during the study were dominated by transport from western and southern Oregon, a region with high fire activity during the summer of 2002. Observations of aerosol properties at the Yosemite NP site were remarkably similar, with similar temporal variations, to data from a second monitoring site at Blodgett Forest Research Station in the Sierra Nevada, approximately 150 km to the NNW. Further similarities to the temporal changes in aerosol properties as measured by monitoring networks with numerous sites in California and Oregon confirmed the regional nature of the haze, which had elevated fine aerosol particle mass concentrations compared with typical summertime average concentrations. The observations suggest that emissions from wild fires can have strong and sustained regional impacts on aerosol concentrations, air quality, and visibility.
AB - Observations of aerosol physical, chemical, and optical properties made at 38 locations in Washington, Oregon, and California are presented to show the regional-scale influence of wildfire smoke during the summer of 2002. Aerosol measurements made during an intensive field campaign conducted in July, August, and September 2002 in Yosemite National Park indicated that smoke-impacted aerosols were present at the park during frequent haze episodes. In addition, backward trajectory analyses showed that large-scale meteorological conditions during the study were dominated by transport from western and southern Oregon, a region with high fire activity during the summer of 2002. Observations of aerosol properties at the Yosemite NP site were remarkably similar, with similar temporal variations, to data from a second monitoring site at Blodgett Forest Research Station in the Sierra Nevada, approximately 150 km to the NNW. Further similarities to the temporal changes in aerosol properties as measured by monitoring networks with numerous sites in California and Oregon confirmed the regional nature of the haze, which had elevated fine aerosol particle mass concentrations compared with typical summertime average concentrations. The observations suggest that emissions from wild fires can have strong and sustained regional impacts on aerosol concentrations, air quality, and visibility.
KW - Aerosol
KW - Carbon
KW - Haze
KW - Regional scale
KW - Smoke
KW - Wildland fire
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U2 - 10.1016/j.agrformet.2006.01.011
DO - 10.1016/j.agrformet.2006.01.011
M3 - Article
AN - SCOPUS:33646166975
SN - 0168-1923
VL - 137
SP - 25
EP - 42
JO - Agricultural and Forest Meteorology
JF - Agricultural and Forest Meteorology
IS - 1-2
ER -