-22- contaminated aerosols. Preliminary dose assessments have been verified now by aerosol measurement methods and at different locations. There remain several unexplained and untested results. Itjs not yet clear why the.aerosol dust concentration is apparently uniform for different surface cover and wind conditions (e.g., coconut grove versus bare field). It is also not known why the p~~tonium enhancement factor is less than unity in the normal case, while at the same time, the aerosol plutonium activity and the aerosol mass size distributions are not significantly different. Long-term monitoring on these remote atolls is not yet very. practical, but, some attempts will ‘be made in the near future to monitor meteorological and aerosol levels by the use of satellite telemetry from remote data acquisition systems. (. ACKNOWLEDGEMENTS The field studies related to this research would not have been possible without the electronic engineering assistance of Cleo O. Fry and Gale Holladay, and the field support by members of the Marshall Islands Do’se Assessment Team, William A: Phillips, Marshall L. Stuart, and Stanley E. Thompson. Gamma analysis was performed in the field by John A. Kirby with the assistance of William H. Burke. “ ( !’ . c“’ /