测量圣海伦斯火山爆发产生的平流层羽流：放射性和化学成分。
Measurements of the stratospheric plume from the mount st. Helens eruption: radioactivity and chemical composition.
出版信息
Science. 1981 Nov 20;214(4523):904-7. doi: 10.1126/science.214.4523.904.
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(3) in the stratospheric number concentration of submicrometer sulfate particles compared to concentrations before the eruption.
1980 年 5 月 18 日圣海伦斯火山爆发时在平流层羽流中进行的气体测量结果与报告中大量氡-222 注入大气的情况不一致。在滤膜样本中未发现挥发性元素钋的富集，钋-210 与铅-210 的比值与背景值没有差异。喷发后不久飞行的实验性撞击器获得的数据显示，与喷发前相比，亚微米硫酸盐颗粒在平流层中的数浓度增加了 10(3)。
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