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The relationship between cloud condensation nuclei (CCN) concentration and light extinction of dried particles: indications of underlying aerosol processes and implications for satellite-based CCN estimates

Cited 16 time in scopus
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Title
The relationship between cloud condensation nuclei (CCN) concentration and light extinction of dried particles: indications of underlying aerosol processes and implications for satellite-based CCN estimates
Authors
Y. Shinozuka1
Yoon, Young Jun
J.J. Lin
T.L. Lathem
R.H. Moore
K.L. Thornhill
J. Redemann
P. Tunved
J. Strom
C.S. McNaughton
R. Wood
A. Jefferson
A. Nenes
A.D. Clarke
Subject
Meteorology & Atmospheric Sciences
Keywords
Aerosol; cloud condensation nuclei; extinction coefficient
Issue Date
2015
Citation
Y. Shinozuka1, et al. 2015. "The relationship between cloud condensation nuclei (CCN) concentration and light extinction of dried particles: indications of underlying aerosol processes and implications for satellite-based CCN estimates". ATMOSPHERIC CHEMISTRY AND PHYSICS, 15(13): 7585-7604.
Abstract
We examine the relationship between the number concentration of boundary-layer cloud condensation nuclei (CCN) and light extinction to investigate underlying aerosol processes and satellite-based CCN estimates. Regression applied to a variety of airborne and ground-based measurements identifies the CCN (cm-3) at 0.4±0.1% supersaturation with 100.3α+1.3σ0.75 where σ (Mm-1) is the 500 nm extinction coefficient by dried particles and α is the Angstrom exponent. The deviation of one kilometer horizontal average data from this approximation is typically within a factor of 2.0. ∂logCCN/∂logσ is less than unity because, among other explanations, aerosol growth processes generally make particles scatter more light without increasing their number. This, barring extensive data aggregation and special meteorology-aerosol connections, associates a doubling of aerosol optical depth with less than a doubling of CCN, contrary to common assumptions in satellite-based analysis of aerosol-cloud interactions.
URI
http://repository.kopri.re.kr/handle/201206/6562
DOI
http://dx.doi.org/10.5194/acp-15-7585-2015
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