HR: 0830h
AN: A31C-0058    [PDF]
TI: Pollution Sources Over the Grand Canyon and Canyonlands National Parks
AU: * Huang, S
EM: suilou@nmt.edu
AF: Geophysical Research Center, New Mexico Tech., 801 Leroy Place, Socorro, NM 87801 United States
AU: Popp, C J
EM: flyfish@nmt.edu
AF: Geophysical Research Center, New Mexico Tech., 801 Leroy Place, Socorro, NM 87801 United States
AU: Arimoto, R
EM: arimoto@cemrc.org
AF: Carlsbad Environmental Monitoring and Research Center, New Mexico State University, 1400 University Drive, Carlsbad, NM 88220 United States
AU: Martin, R S
EM: rmartin@cc.usu.edu
AF: Civil and Environmental Engineering Department, Utah State University, 8200 Old Main Hill, Logen, UT 84322 United States
AB: To investigate pollution sources that are degrading the visibility of two national parks, Grand Canyon National Park, AZ, and Canyonlands National Park, UT, daily samples of total suspended particulates (TSP), PM2.5, trace gases, and organic compounds were collected in the two parks in the summer (July) of 2001 and winter (December-January) of 2001-2002. Factor analysis results show a number of anthropogenic signals (e.g., smelters) in the summer air over the Grand Canyon. In winter, the Grand Canyon samples revealed an aged pollution signal, which was probably transported from long distance, and a local source. In contrast, Canyonlands has less distinctive pollution signals in summer compared with winter. Summer air there shows an aged pollution source, evidence for smelter impacts on the concentrations of rare-earth elements and other metals, and a titanium source. More individual pollution signals were identified from the winter samples at Canyonlands (e.g., coal combustion and smelters). Our chemical and meteorological data clearly indicate that the main long-range transport pathway for pollution in summer is via southwesterly winds at both national parks; this implicates western Arizona as a likely source region. In winter pollution comes from the Salt Lake area via northerlies or northwesterlies.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 1065 Trace elements (3670)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting