HIGH ALTITUDE SAMPLING PROGRAM (HASP)
Special rept. no. 2
DEFENSE ATOMIC SUPPORT AGENCY WASHINGTON DC
Pagination or Media Count:
A recalibration of the U-2 ducts has diminished the previous discrepancy noted in the flow rates. Absolute values of radionuclide concentrations are increased 8 to 13 by this recalibration. A discussion on the structure and nature of the 0.1 to 1.0 micron family of naturally occuring stratospheric aerosol is presented. This dust layer of ammonium sulfate appears to be generated in the stratosphere and may play an important role in lower stratospheric fallout processes. A detailed discussion of stratospheric concentrations of a number of nuclides is presented. Sr-90 and W-185 inventories and distributions from August 1957 to May 1960 are discussed. By May 1960 maximum tungsten values are found in the lower altitude equatorial regions while maximum strontium values are found in the higher altitude polar regions. The tungsten stems from low altitude HARDTACK shots only while the strontium appears to show influx from Teak and Orange. The tungsten and strontium concentration variations shed considerable light on stratospheric mixing processes. Ba-140, Sr-89, and Ce-144 concentrations assist in determining the age of debris and thus allow following of stratospheric mixing and transfer processes. A number of definite seasonal effects are noted.
- Radioactivity, Radioactive Wastes and Fission Products