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Journal article
Weekly patterns of aerosol in the United States
Atmospheric chemistry and physics, v 8(10), pp 2729-2739
22 May 2008
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Data from the Interagency Monitoring of Protected Visual Environments (IMPROVE) network of aerosol samplers and NOAA monitoring sites are examined for weekly cycles. At remote and rural sites, fine particle elemental carbon, crustal elements, and coarse particle mass had pronounced (up to 20%) weekly cycles with minima on Sunday or Monday. Fine particle organic carbon and mass had smaller amplitude cycles, also with Sunday or Monday minima. There was no statistically significant weekly cycle in fine particle sulfate despite a 5 to 15% weekly cycle in power plant SO2 emissions. Although results for nitrate may be more susceptible to sampling artifacts, nitrate also showed a pronounced weekly cycle with an amplitude similar to elemental carbon. The only species found with a weekend maximum was Pb, probably from general aviation on weekends. Aerosol optical properties at NOAA monitoring sites were consistent with the IMPROVE chemical data, with significant weekly cycles in aerosol light absorption but not light scattering. These results support a large role of diesel emissions in elemental carbon aerosol over the entire United States and suggest that a large fraction of the airborne soil dust is anthropogenic. They also suggest that studies of weekly cycles in temperature, cloudiness, precipitation, or other meteorological variables should look for causes more in light-absorbing particles and possible ice nucleation by dust rather than sulfate or total aerosol. There are also implications for personal exposure and epidemiological studies of aerosol health effects.
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Details
- Title
- Weekly patterns of aerosol in the United States
- Creators
- D. M. Murphy - Earth System Research LaboratoryS. L. Capps - NOAA Earth System Research LaboratoryJ. S. Daniel - Earth System Research LaboratoryG. J. Frost - Cooperative Institute for Research in Environmental SciencesW. H. White - University of California, Davis
- Publication Details
- Atmospheric chemistry and physics, v 8(10), pp 2729-2739
- Publisher
- European Geosciences Union
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000256289900009
- Scopus ID
- 2-s2.0-44349106972
- Other Identifier
- 991019186641904721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Environmental Sciences
- Meteorology & Atmospheric Sciences