Millipore filter samples obtained at the Mauna Loa Observatory and at Hillo, Hawaii, were analyzed for chloride particle concentrations. These data are used in a transport model to determine the removal efficiency of particles.
The most interesting result from the analysis is that the percentage of particles removed is uniform from the shore to the mountain observatory regardless of size. These results lead to calculations of the impaction-sedimentation ratio which range from 212 for 20μm diameter particles to 6413 for 4μm particles. The total impaction factors (removal by trees and other vegetation) ringed from 0.267 to 0.323 along the 60-km path.