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 cm−2 yr−1 at a site in Palo Alto, California and 0.21 dpm cm−2 yr−1 at a site in Los Angeles. The Palo Alto value agrees well with a long-term average of 0.14 dpm cm−2 yr−1, 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% of the Pb-210 fallout occurs as wet deposition at the Los Angles site.
|Publication Subtype||Journal Article|
|Title||The fallout rate of PB-210 on the western coast of the United States|
|Series title||Geophysical Research Letters|
|Contributing office(s)||San Francisco Bay-Delta|
|Online Only (Y/N)||N|
|Additional Online Files (Y/N)||N|
|Google Analytic Metrics||Metrics page|