DEPOSITION OF RADIOACTIVE DUST AND ATMOSPHERIC CONDITIONS

Journal Article · Fri Jan 01 04:00:00 EST 1960 · J. Fac. Sci. Niigata Univ., Ser. I

OSTI ID:4138253

Sotobayashi, T; Koyama, S

There are two processes for causing the deposition of the artificial radioactive dust. First, a process in which the dust is transported from the stratosphere and the up troposphere where the most part of dust resides to the middle or lower troposphere where condensation and precipitation mainly occur, second, a process in which the dust is captured as nuclei of cloud particles and in collisior with raindrops in the middle and lower layer of the troposphere. In the first process, the effect of increasing the air concentration of dust owing to the downward component of upper air now is considered. In the middle latitudes this effect is closely related with the atmospheric condition of whether or not a trough of the long wave in the westerlies exists over an observation point. In the latter proces deposition of the dust is affected markedly by the air concentration of radioactive dust in the layer where condensation and precipitation occur and the total traveling range of raindrops through the air mass which contains the radioactive dust. In regard to the meteorological conditions related with this process, the important factors are the rela tive position of an observation point to the path of an extratropical cyclone and the type of rain. (auth)

• Research Organization: Niigata Univ., Japan
• NSA Number: NSA-15-001600
• OSTI ID: 4138253
• Journal Information: J. Fac. Sci. Niigata Univ., Ser. I, Journal Name: J. Fac. Sci. Niigata Univ., Ser. I Vol. Vol: 2
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ATMOSPHERE
CONTAMINATION
DUSTS
FALLOUT
GEOLOGY, MINERALOGY, AND METEOROLOGY
LIQUEFYING
METEOROLOGY
RADIOACTIVITY
RAIN
STRATOSPHERE