在平流层气溶颗粒中的化物
Daniel M Murphy1,2, Maya Abou-Ghanem1, Adam T Ahern1,3
1Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305.
概括
平流层是大气中高酸盐的重要来源,这是一种有毒的饮用水污染物. 它在特定气溶颗粒中的存在表明气候干预的潜在增加.
科学领域:
- 环境化学环境化学
- 大气科学 大气科学
- 地质化学 地质化学
背景情况:
- 甲酸盐是饮用水中存在的受管制污染物.
- 以前的同位素研究表明大气形成和平流层对沉积的酸盐的贡献.
- 确切的大气来源和形成途径仍然不完全理解.
研究的目的:
- 测量平流层气溶颗粒中的酸盐度.
- 为了确定负责高酸盐生产的大气层.
- 为了研究与平流层酸盐相关的颗粒类型.
主要方法:
- 在平流层气溶样本中对酸盐的分析.
- 测量质量混合比率 (pptm).
- 化物存在与特定气溶颗粒类型 (生物质燃烧,富含) 的相关性.
主要成果:
- 在平流层的气溶颗粒中检测到甲酸盐,证实平流层是关键来源.
- 在热层层中没有观察到过酸盐的产生.
- 层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层地层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层层
- 酸盐主要存在于燃烧的生物质和富含的颗粒中,而不是硫酸颗粒.
结论:
- 平流层是大气中高酸盐的重要来源.
- 甲酸盐的形成可能与颗粒的酸度有关,较少的酸性颗粒的度较高.
- 如果太阳辐射修饰策略涉及将材料注入平流层,全球酸盐产量可能会增加.
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