埃尔·奇 (El chichon): 羽毛气体和颗粒的组成
Science (New York, N.Y.)
|December 2, 1983
概括
埃尔奇火山释放出大量的挥发性元素,如硫和. 这些元素,特别是,集中在较小的火山灰颗粒中.
科学领域:
- 地质化学 地质化学
- 大气科学 大气科学
- 火山学 火山学是一门学科.
背景情况:
- 墨西哥的El Chichón火山在1982年爆发.
- 火山羽毛含有微量气体,颗粒和酸性挥发物.
研究的目的:
- 为了分析El Chichón火山羽毛中的微量气体和粒子.
- 量化微量元素排放及其颗粒大小分布.
主要方法:
- 基于火山羽毛的飞机采样.
- 对元素度进行中子激活分析.
- 对于流量估计的硫排放率的规范化.
主要成果:
- 硫化是主要的硫气体.
- 挥发性元素 (S, Cl, As, Se, Br, Sb, I, W, Hg) 在羽毛中高度丰富 (60-20,000x).
- 在小颗粒 (<3微米) 上发现了,和.
- 来自暴力喷发的平流层灰显示出比静止的羽毛材料更高的元素丰富度 (10-30倍).
结论:
- 火山排放对大气组成有很大的影响.
- 微量元素分成颗粒的分化因元素和颗粒大小而异.
- 暴力喷发对平流层元素负荷的影响更大.
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