HR: 0830h
AN: B21F-0768    [PDF]
TI: Estimate of Nutrient Input to the Pacific Ocean from Long-Range Transport of Aerosols
AU: * Cliff, S S
EM: sscliff@ucdavis.edu
AF: Universisty of California, Davis, Department of Applied Science One Shields Avenue, Davis, CA 95616 United States
AU: VanCuren, T
EM: rvancure@arb.ca.gov
AF: California Air Resources Board, 1001 I Street, Sacramento, CA 95812 United States
AB: Dust and pollution generation and transport have increasingly become the subject of scrutiny for their impacts on global climate, the ecosystem, and human health. Several recent regional and hemispheric scale campaigns were conducted to better characterize aerosol composition and transport. These campaigns include the 2001 Aerosol Characterization Experiment in Asia (ACE-Asia) and the Intercontinental Transport and Chemical Transformation Experiment of 2002 (ITCT-2K2). In addition, long-term sampling has been conducted at National Parks and Monuments across the United States as part of the Interagency Monitoring of Protected Visual Environments (IMPROVE) program. These data provide a basis for estimating the transport and deposition of atmospheric particulate matter to the northern hemisphere oceans. Here we focus on the aerosol that is generated in Asia (i.e. compositionally distinct from North America and Europe) and transported across the Pacific Basin. The flux of aerosol from the source region from ACE-Asia data combined with data from receptor sites in North America from ACE-Asia, ITCT, and IMPROVE sampling are used to estimate oceanic deposition. A previously identified signature for Asian aerosol (VanCuren and Cahill, JGR December 2003) is used as a marker for transport. Comparison with direct deposition measurements is made.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
DE: 4504 Air/sea interactions (0312)
DE: 4801 Aerosols (0305)
SC: Biogeosciences [B]
MN: 2003 Fall Meeting