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Vertical and Horizontal Mixing Rates of Radioactive Material in the Ocean; Taux de Melange Vertical et Horizontal des Matieres Radioactives Contenues dans l'Ocean; 0421 041a 041e 0420 041e 0421 0422 0414 ; Velocidades de Mezcla Vertical y Horizontal de Sustancias Radiactivas en las Aguas del Oceano

Abstract

Observations on the vertical distribution of radioactivity in the Pacific Ocean showed that presence of activity was mostly limited to the mixed layer above the thermocline in June 1954 (Miyake, Sugiura and Kameda, 1954). In March 1955, however, the activity extended down to about 600 m below the surface, the thermocline being present at the depth of 75 m (operation Troll, USAEC, 1956). If there is any biological transport of radioactive material in a vertical direction in sea-water, migration of plankton might be more effective than decomposition of organic debris in transporting radioactive material, although it would be only 10-20% of the physical mixing rate. When radioactive material diffuses out from a source point, the horizontal eddy diffusion coefficient may be obtained from the time change of the distribution of the activity. (author) [French] Il ressort des observations sur la repartition verticale de la radioactivite dans l'ocean Pacifique que l'activite, en juin 1954, etait presque entierement limitee a la couche mixte situee au-dessus du gradient thermique. Cependant, en mars 1955, l'activite s'etendait jusqu'aux environs de 600 m au-dessous de la surface, le gradient thermique se situant a une profondeur de 75 m (operation Troll, USAEC 1956). Si donc il y  More>>
Authors:
Miyake, Y.; Saruhashi, K. [1] 
  1. Geochemical Laboratory, Meteorological Research Institute, Tokyo (Japan)
Publication Date:
Jul 01, 1960
Product Type:
Conference
Resource Relation:
Conference: Scientific Conference on the Disposal of Radioactive Wastes, Monaco (Monaco), 16-21 Nov 1959; Other Information: 8 refs., 2 tabs., 3 figs.; Related Information: In: Disposal of Radioactive Wastes. Vol. II. Proceedings of the Scientific Conference on the Disposal of Radioactive Wastes| 586 p.
Subject:
54 ENVIRONMENTAL SCIENCES; AQUATIC ECOSYSTEMS; DECOMPOSITION; MIXING; PACIFIC OCEAN; RADIOACTIVE MATERIALS; RADIOECOLOGICAL CONCENTRATION; RADIOECOLOGY; RADIONUCLIDE MIGRATION; SEAWATER
OSTI ID:
22192414
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); United Nations Educational, Scientific and Cultural Organization, Paris (France); Food and Agriculture Organization, Rome (Italy)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M3538016903
Submitting Site:
INIS
Size:
page(s) 167-173
Announcement Date:
Feb 20, 2014

Citation Formats

Miyake, Y., and Saruhashi, K. Vertical and Horizontal Mixing Rates of Radioactive Material in the Ocean; Taux de Melange Vertical et Horizontal des Matieres Radioactives Contenues dans l'Ocean; 0421 041a 041e 0420 041e 0421 0422 0414 ; Velocidades de Mezcla Vertical y Horizontal de Sustancias Radiactivas en las Aguas del Oceano. IAEA: N. p., 1960. Web.
Miyake, Y., & Saruhashi, K. Vertical and Horizontal Mixing Rates of Radioactive Material in the Ocean; Taux de Melange Vertical et Horizontal des Matieres Radioactives Contenues dans l'Ocean; 0421 041a 041e 0420 041e 0421 0422 0414 ; Velocidades de Mezcla Vertical y Horizontal de Sustancias Radiactivas en las Aguas del Oceano. IAEA.
Miyake, Y., and Saruhashi, K. 1960. "Vertical and Horizontal Mixing Rates of Radioactive Material in the Ocean; Taux de Melange Vertical et Horizontal des Matieres Radioactives Contenues dans l'Ocean; 0421 041a 041e 0420 041e 0421 0422 0414 ; Velocidades de Mezcla Vertical y Horizontal de Sustancias Radiactivas en las Aguas del Oceano." IAEA.
@misc{etde_22192414,
title = {Vertical and Horizontal Mixing Rates of Radioactive Material in the Ocean; Taux de Melange Vertical et Horizontal des Matieres Radioactives Contenues dans l'Ocean; 0421 041a 041e 0420 041e 0421 0422 0414 ; Velocidades de Mezcla Vertical y Horizontal de Sustancias Radiactivas en las Aguas del Oceano}
author = {Miyake, Y., and Saruhashi, K.}
abstractNote = {Observations on the vertical distribution of radioactivity in the Pacific Ocean showed that presence of activity was mostly limited to the mixed layer above the thermocline in June 1954 (Miyake, Sugiura and Kameda, 1954). In March 1955, however, the activity extended down to about 600 m below the surface, the thermocline being present at the depth of 75 m (operation Troll, USAEC, 1956). If there is any biological transport of radioactive material in a vertical direction in sea-water, migration of plankton might be more effective than decomposition of organic debris in transporting radioactive material, although it would be only 10-20% of the physical mixing rate. When radioactive material diffuses out from a source point, the horizontal eddy diffusion coefficient may be obtained from the time change of the distribution of the activity. (author) [French] Il ressort des observations sur la repartition verticale de la radioactivite dans l'ocean Pacifique que l'activite, en juin 1954, etait presque entierement limitee a la couche mixte situee au-dessus du gradient thermique. Cependant, en mars 1955, l'activite s'etendait jusqu'aux environs de 600 m au-dessous de la surface, le gradient thermique se situant a une profondeur de 75 m (operation Troll, USAEC 1956). Si donc il y a un transport biologique quelconque de matieres radioactives dans le sens vertical, la migration de planctons pourrait etre plus efficace que la decomposition des debris organiques pour le transport de matieres radioactives alors qu'elle ne representerait que 10 a 20 pour cent du taux de melange physique. Lorsqu'une matiere est diffusee a partir d'une source, le coefficient de diffusion horizontale des remous peut etre calcule d'apres la modification du temps de repartition de l'activite. (author) [Spanish] Los estudios realizados sobre la distribucion vertical de la radiactividad en el oceano Pacifico pusieron de manifiesto que, en junio de 1954, dicha actividad se circunscribia principalmente a la capa mezclada situada por encima de la termoclina (Miyake, Sugiura y Kameda, 1954). Ahora bien, en marzo de 1955 la radiactividad se extendio hasta unos 600 metros por debajo de la superficie, encontrandose la termoclina a una profundidad de 75 m. (Operation Troll, Comision de Energia Atomica de los Estados Unidos, 1956). De esta forma se tiene que si en el agua del mar hay un transporte biologico de sustancias radiactivas en direccion vertical, la migracion del plancton pudiera tener mas influencia en el transporte de las sustancias radiactivas que la descomposicion de los restos organicos, aunque dicho transporte represente solamente de un 10 a un 20 por ciento de la velocidad de mezcla fisica. Cuando las sustancias radiactivas se difunden partiendo de un punto, el coeficiente de difusion turbulenta horizontal puede determinarse partiendo de la variacion de la distribucion de la actividad en funcion del tiempo. (author) [Russian] Nabljudenija za raspredeleniem radioaktivnosti po vertikal'noj ploskosti v Tihom okeane pokazali, chto v ijune 1954 goda (Mijake, Sigiura i Kameda, 1954 g.) prisutstvie radioaktivnosti v osnovnom nabljudalos' tol'ko v smeshannom sloe vyshe sloja perepada temperatur. Odnako v marte 1955 goda aktivnost' rasprostranilas' pochti na 600 metrov nizhe poverhnosti vody v to vremja, kak perepad temperatur nahodilsja na glubine 75 metrov (operacija Troll, KAJe SShA, 1956 g.). Takim obrazom, esli imeetsja kakoe-libo biologicheskoe peremeshhenie radioaktivnogo materiala v vertikal'nom napravlenii v morskoj vode, migracija planktona mozhet byt' bolee jeffektivnoj, chem narushenie soderzhanija ostatkov organicheskih veshhestv pri peremeshhenii radioaktivnogo materiala, hotja ono i sostavit tol'ko 10-12 procentov skorosti fizicheskogo smeshivanija. Kogda radioaktivnyj material v rezul'tate diffuzii vydeljaetsja iz tochechnogo istochnika, to kojefficient gorizontal'noj vihrevoj diffuzii mozhno poluchit' iz vremeni izmenenija raspredelenija aktivnosti. (author)}
place = {IAEA}
year = {1960}
month = {Jul}
}