| 尹仔锋.直接观测大气气溶胶成核[J].沙漠与绿洲气象,2014,8(1): |
| 直接观测大气气溶胶成核 |
| Direct Observations of Atmospheric Aerosol Nucleation |
| 投稿时间：2013-05-30 修订日期：2013-07-12 |
| DOI： |
| 中文关键词: 大气气溶胶成核 |
| 英文关键词:Atmospheric Aerosol Nucleation |
| 基金项目: |
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| 中文摘要: |
| 大气核化是全球大气气溶胶粒子的主要来源，在气溶胶气候效应中扮演重要角色。大气核化过程的关键步骤发生在2 nm以下的尺寸范围，在如此小的范围直接对其大小隔离观察直到最近才得以进行。本文呈现了1nm流动性直径范围内的大气纳米颗粒和集群的详细观测结果，确定了三个独立的低于2nm直径的尺寸类型，建立了物理、化学、动力一致的大气成核框架，更具体地说，气溶胶通过中性的途径形成。研究结果强调了在大气气溶胶形成过程中有机化合物的重要作用，导致气溶胶增长、辐射强迫及生物排放量、云和气候之间的相关反馈。 |
| 英文摘要: |
| Atmospheric nucleation is the dominant source of aerosol particles in the global atmosphere and an important player in aerosol climatic effects. The key steps of this process occur in the sub–2-nanometer (nm) size range, in which direct size-segregated observations have not been possible until very recently. Here, we present detailed observations of atmospheric nanoparticles and clusters down to 1-nm mobility diameter. We identified three separate size regimes below 2-nm diameter that build up a physically, chemically, and dynamically consistent framework on atmospheric nucleation—more specifically, aerosol formation via neutral pathways. Our findings emphasize the important role of organic compounds in atmospheric aerosol formation, subsequent aerosol growth, radiative forcing and associated feedbacks between biogenic emissions, clouds, and climate. |
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