The fallout rate of Pb-210 on the western coast of the United States

Details The fallout rate of Pb-210 on the western coast of the United States The fallout rate of Pb-210 on the western coast of the United States

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10.1164f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, Dec. 1983, p. 1164-1167.

Physics

6

Air Pollution, Fallout, Lead Isotopes, United States, Precipitation

Scientific paper

The deposition rate of atmospheric Pb-210 has been measured during a one year period using plastic funnels as collectors. Observed rates were 0.15 dpm/sq cm per yr at a site in Palo Alto, California and 0.21 dpm/sq cm per yr at a site in Los Angeles. The Palo Alto value agrees well with a long-term average of 0.14 dpm/sq cm per yr, obtained from a nearby salt marsh core. These rates are only one-third of those previously estimated using global models for Pb-210 fallout, and indicate the need to consider both longitude and precipitation as factors controlling fallout rates. More than 75 percent of the Pb-210 fallout occurs as wet deposition at the Los Angeles site.

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