DIURNAL CHANGES OF THE DUST CONTENT OF THE SURFACE LAYER OF THE ATMOSPHERE
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
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As a result of constantly acting wind erosion, radioactive fallout matter, together with soil particles, again enters into the atmosphere, increasing the concentration of radioactive dust in the air. In order to study certain details of this secondary process special model experiments are formulated for clarification of the diurnal variation of the fallout of virtually weightless dust, continuously forming on the underlying surface. The investigation was carried out by the labeled atoms method and conditions were created making it possible to exclude the distorting influence of global fallout. The fallout at a height of 1 m above the earths surface was recorded automatically on sticky sheets. A simple apparatus with a clock mechanism which wound the sticky sheet at prescribed intervals was used. The experiments were made in the summer in a meadow with a well-developed grass cover.
- Atmospheric Physics