期刊
JOURNAL OF ENVIRONMENTAL MONITORING
卷 13, 期 7, 页码 1919-1926出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1em10117j
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资金
- United States Environmental Protection Agency (U.S. EPA)
- New York State Energy Research and Development Authority (NYSERDA)
- New York State Department of Environmental Conservation (NYSDEC)
- National Science Foundation (NSF)
- Texas Commission on Environmental Quality (TCEQ)
- Laredo Health Department
Previously it has been suggested that certain organic aerosol components of wood smoke have enhanced ultraviolet absorption at 370 nm relative to 880 nm in two-wavelength aethalometer measurements. This enhanced absorption could serve as an indicator of wood burning particles. Two-wavelength (370 nm and 880 nm) aethalometer measurements were made at urban sites in Rochester, New York and Laredo, Texas from August 1 to December 31, 2009 and from December 23, 2007 to January 2, 2008, respectively. In Rochester, Delta-C (UVBC370nm - BC880nm) values were higher by a factor of 3 during the night than during the day in November and December when residential wood burning was common. In Laredo, particularly high Delta-C values were observed on Christmas Eve and New Year's Eve and were attributed to biomass burning and firework emissions. Exponential decay was found to be a good estimator for predicting BC concentrations at different wind speeds regardless of wind directions.
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