期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 15, 期 28, 页码 11634-11639出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51148k
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资金
- National Science Foundation [ATM 0639847]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Direct For Mathematical & Physical Scien [1300723] Funding Source: National Science Foundation
- Directorate For Geosciences [1120076] Funding Source: National Science Foundation
- Div Atmospheric & Geospace Sciences [1120076] Funding Source: National Science Foundation
- Division Of Chemistry [1300723] Funding Source: National Science Foundation
The presence of organic surfactants in atmospheric aerosol may lead to a depression of cloud droplet growth and evaporation rates affecting the radiative properties and lifetime of clouds. Both the magnitude and mechanism of this effect, however, remain poorly constrained. We have used Raman thermometry measurements of freely evaporating micro-droplets to determine evaporation coefficients for several concentrations of acetic acid, which is ubiquitous in atmospheric aerosol and has been shown to adsorb strongly to the air-water interface. We find no suppression of the evaporation kinetics over the concentration range studied (1-5 M). The evaporation coefficient determined for 2 M acetic acid is 0.53 +/- 0.12, indistinguishable from that of pure water (0.62 +/- 0.09).
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