Skip to main content
Skip to main menu Skip to spotlight region Skip to secondary region Skip to UGA region Skip to Tertiary region Skip to Quaternary region Skip to unit footer


Validation and Application of a UV-Vis Broadband Cavity-Enhanced Spectrometer for Aerosol Extinction Measurement

Michael Pogash
Michael Pogash
Chemistry Building, Room 400
Analytical Seminar

Atmospheric aerosols absorb and scatter solar radiation, thereby altering the flux of solar energy reaching Earth. Quantifying the aerosol-radiation interaction is difficult and the effect of aerosols on the propagation of sunlight through the atmosphere is poorly characterized. Accurate, precise observations of aerosol absorption and scattering are necessary to improve radiative transfer models. We have developed a broadband cavity-enhanced spectrometer, dubbed BBCES-III, to measure the extinction (extinction = absorption + scattering) by atmospheric aerosols throughout the UV-Vis spectrum. In this talk, I will discuss the design and validation of the BBCES-III. Then, I will show how the BBCES-III was used to determine the refractive index and size distribution of polystyrene latex spheres, a common calibration standard, using non-linear least squares optimization.

Support Us

We appreciate your financial support. Your gift is important to us and helps support critical opportunities for students and faculty alike, including lectures, travel support, and any number of educational events that augment the classroom experience. Click here to learn more about giving.

Every dollar given has a direct impact upon our students and faculty.

Got More Questions?

Undergraduate inquiries: 

Registration and credit

AP Credit, Section Changes, Overrides,

Graduate inquiries:

Contact Us!

Assistant to the Department Head: Donna Spotts, 706-542-1919 

Main office phone: 706-542-1919 

Main Email:

Head of Chemistry: Prof. Jason Locklin