HR: 16:30h
AN: A34B-03    [Abstracts]
TI: Black Carbon Properties in the Marine and Ohio Valley Boundary Layers: Contrast and Similarities Related to Sources, Cloud Processing and Aging
AU: * Kok, G L
EM: glokok@dropletmeasurement.com
AF: Droplet Measurement Technologies, 5710 Flatiron Parkway, Suite B, Boulder, CO 80301 United States
AU: Baumgardner, D G
EM: darrel@servidor.unam.mx
AF: University of Mexico, Mexico City, Mexico City, 00000 Mexico
AU: Buzorius, G
EM: gbuzoriu@nps.navy.mil
AF: Naval Postgraduate School, 3200 Imjin Road, Marina, CA 93933 United States
AU: Jonsson, H
EM: hjonsson@nps.navy.mil
AF: Naval Postgraduate School, 3200 Imjin Road, Marina, CA 93933 United States
AB: The properties of black carbon (BC) on a particle-by-particle basis, have been measured from aircraft with the Single Particle Soot Photometer (SP2) in the marine boundary layer off the California coast in July, 2003 and in the boundary layer over the central Ohio Valley in the summer of 2004. The SP2 technique allows the BC particle mass to be determined directly by incandescent emissions and the diameter to be estimated from light scattering. The relative shapes and sizes of the two signals provides information about the fraction of BC in a mixed component particle and as well as the relative differences in composition from particle to particle. The comparison of BC properties from the marine and continental boundary layers highlights the importance of aging and cloud processing in the evolution of BC.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting