Penetration of ^<90>Sr and ^<137>Cs in deep layers of the Pacific and vertical diffusion rate of deep water

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概要

• 論文の詳細を見る

• Vertical penetration of Sr-90 and Cs-137 down to 5,000 m depth was confirmed in the western North Pacific. Surface values of these radionuclides range from 0. 6 to 3. 1 μμC/L for Sr-90 and from 0. 8 to 4. 8 μμC/L for Cs-137, while at 5,000 m depth both nuclides of about 0. 1 μμC/L were determined. From the vertical variation in the concentration of radio-nuclides, the vertical diffusion coefficient from 200 m to 4,000 m depth was calculated and the value of 200 was obtained. Time required to attain practically a homogeneous vertical distribution of substances which is put in the western part of the north Pacific Ocean would be a few hundred years.

• 日本放射線影響学会の論文

著者

• 三宅 泰雄

  Meteorological Research Institute

• 猿橋 勝子

  Meteorological Research Institute

• 葛城 幸雄

  Meteorological Research Institute

• 金沢 照子

  Meteorological Research Institute

関連論文

• The Peak in radioactive Fallout in the Temperate Zone of the Northern Hemisphere
• Penetration of ^Sr and ^Cs in deep layers of the Pacific and vertical diffusion rate of deep water
• Cesium 137 and Strontium 90 in Sea Water
• A Comparison of Analytical Techniques Used for Determination of Fallout Cesium in Sea Water for Oceanographic Purpose

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