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Title: Measurements of the stratospheric plume from the Mount St. Helens eruption: radioactivity and chemical composition

Gas measurements made in the stratospheric plume from the eruption of Mount St. Helens on 18 May 1980 were not consistent with a reported large injection of radon-222 into the atmosphere. No enrichment in the volatile element polonium was found in filter samples, and the ratio of polonium-210 to lead-210 was not different from background values. Data obtained with an experimental impactor, flown shortly after the eruption, showed an increase of 10/sup 3/ in the stratospheric number concentration of submicrometer sulfate particles compared to concentrations before the eruption.
Authors:
 [1] ; ; ; ; ; ; ; ;
  1. (Dept. of Energy, New York, NY)
Publication Date:
OSTI Identifier:
5898084
Resource Type:
Journal Article
Resource Relation:
Journal Name: Science (Washington, D.C.); (United States); Journal Volume: 214
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; MT ST HELENS; AERIAL MONITORING; VOLCANIC GASES; CHEMICAL COMPOSITION; RADIOACTIVITY; ERUPTION; EXPERIMENTAL DATA; LEAD 210; MULTI-ELEMENT ANALYSIS; PARTICULATES; PLUMES; POLONIUM 210; RADON 222; SAMPLING; STRATOSPHERE; SULFATES; X-RAY EMISSION ANALYSIS; ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHEMICAL ANALYSIS; DATA; DAYS LIVING RADIOISOTOPES; EARTH ATMOSPHERE; EVEN-EVEN NUCLEI; FLUIDS; GASES; HEAVY NUCLEI; INFORMATION; ISOTOPES; LEAD ISOTOPES; MONITORING; MOUNTAINS; NONDESTRUCTIVE ANALYSIS; NUCLEI; NUMERICAL DATA; OXYGEN COMPOUNDS; PARTICLES; POLONIUM ISOTOPES; RADIOISOTOPES; RADON ISOTOPES; SULFUR COMPOUNDS; YEARS LIVING RADIOISOTOPES 500200* -- Environment, Atmospheric-- Chemicals Monitoring & Transport-- (-1989); 500300 -- Environment, Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)