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Titolo:
Spectral dependence of visible light absorption by carbonaceous particles emitted from coal combustion
Autore:
Bond, TC;
Indirizzi:
NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA NOAA Seattle WA USA 98115 ific Marine Environm Lab, Seattle, WA 98115 USA
Titolo Testata:
GEOPHYSICAL RESEARCH LETTERS
fascicolo: 21, volume: 28, anno: 2001,
pagine: 4075 - 4078
SICI:
0094-8276(20011101)28:21<4075:SDOVLA>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMORPHOUS-CARBON; UNITED-STATES; AEROSOLS; SULFATE; CALIBRATION; MATTER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Bond, TC NOAA, Pacific Marine Environm Lab, 7600 Sand Point Way NE, Seattle, WA 98115 USA NOAA 7600 Sand Point Way NE Seattle WA USA 98115 le, WA 98115 USA
Citazione:
T.C. Bond, "Spectral dependence of visible light absorption by carbonaceous particles emitted from coal combustion", GEOPHYS R L, 28(21), 2001, pp. 4075-4078

Abstract

Optical characteristics of particles that absorb visible light are needed to model their effects on atmospheric radiation. Light absorption by particles emitted from low-technology coal combustion has exhibited a strong spectral dependence. I investigate various explanations for this phenomenon andconclude that a spectrally dependent imaginary refractive index is the most plausible. Following previous work on the structure of amorphous carbon, I propose that both the magnitude and spectral dependence of light absorption axe controlled by the size of graphitic clusters within the material, and can be described using the optical band-gap theory. This hypothesis is analternative to the current measurement divisions of light-absorbing "blackcarbon" and non-absorbing "organic carbon," and offers an explanation for preferential absorption at blue wavelengths that may extend to ultraviolet wavelengths.

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Documento generato il 29/11/20 alle ore 06:54:30