Connotea
CiteULike
del.ico.us
BibSonomyAbstract
GEOPHYSICAL RESEARCH LETTERS,
VOL. 36,
L13810,
5 PP., 2009
doi:10.1029/2009GL037435
Spectral absorption properties of aerosol particles from 350–2500nm
Physics Department and Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, Maryland, USA
Institute of Physics, University of Sao Paulo, Sao Paulo, Brazil
NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
Institute of Physics, University of Sao Paulo, Sao Paulo, Brazil
NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
The aerosol spectral absorption efficiency (α a in m2/g) is measured over an extended wavelength range (350–2500 nm) using an improved calibrated and validated reflectance technique and applied to urban aerosol samples from Sao Paulo, Brazil and from a site in Virginia, Eastern US, that experiences transported urban/industrial aerosol. The average α a values (∼3m2/g at 550 nm) for Sao Paulo samples are 10 times larger than α a values obtained for aerosols in Virginia. Sao Paulo aerosols also show evidence of enhanced UV absorption in selected samples, probably associated with organic aerosol components. This extra UV absorption can double the absorption efficiency observed from black carbon alone, therefore reducing by up to 50% the surface UV fluxes, with important implications for climate, UV photolysis rates, and remote sensing from space.
Received 30 January 2009; accepted 5 May 2009; published 14 July 2009.
Citation: (2009), Spectral absorption properties of aerosol particles from 350–2500nm, Geophys. Res. Lett., 36, L13810, doi:10.1029/2009GL037435.
Cited By