Measurements of continuous spectra of atmospheric absorption coefficients from UV to NIR via optical method

Details Measurements of continuous spectra of atmospheric absorption coefficients from UV to NIR via optical method Measurements of continuous spectra of atmospheric absorption coefficients from UV to NIR via optical method

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3213811m&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 13, CiteID L13811

Physics

3

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Atmospheric Composition And Structure: Pollution: Urban And Regional (0305, 0478, 4251), Atmospheric Composition And Structure: Troposphere: Constituent Transport And Chemistry, Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

In this study we extend from the visible to the UV a traditional method for studying the radiative properties of black carbon. We apply this measuring possibility to a practical study carried out in the Southern Iberian Peninsula during summer 2004. Using an optical technique based on the integrating sphere method, absorption coefficients, σa, were determined in the visible and in the ultraviolet regions of spectrum. The obtained values are representative of remote areas including during desert episodes that reach this area. To analyse the spectral shape of σa we derived a parameter (αa) which is the slope of the linear fit of the log-log plot of σa versus λ. This parameter is similar to the Ångstrom exponent used for extinction. The reported αa values for the UV appear as very original data in the literature.

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