期刊
NATURE COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41467-019-12473-2
关键词
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资金
- Academy of Finland Center of Excellence programme [307331]
- Academy of Finland [299544, 304347]
- US National Science Foundation [AGS1801897]
- Department of Energy [DE-SC0006867, DE-SC0018221]
- U.S. Department of Energy (DOE) [DE-SC0018221, DE-SC0006867] Funding Source: U.S. Department of Energy (DOE)
Particles formed in the atmosphere via nucleation provide about half the number of atmospheric cloud condensation nuclei, but in many locations, this process is limited by the growth of the newly formed particles. That growth is often via condensation of organic vapors. Identification of these vapors and their sources is thus fundamental for simulating changes to aerosol-cloud interactions, which are one of the most uncertain aspects of anthropogenic climate forcing. Here we present direct molecular-level observations of a distribution of organic vapors in a forested environment that can explain simultaneously observed atmospheric nanoparticle growth from 3 to 50 nm. Furthermore, the volatility distribution of these vapors is sufficient to explain nanoparticle growth without invoking particle-phase processes. The agreement between observed mass growth, and the growth predicted from the observed mass of condensing vapors in a forested environment thus represents an important step forward in the characterization of atmospheric particle growth.
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