Abstract
Sun photometer measurements over the Thessaloniki AErosol RObotic NETwork (AERONET) site were conducted during 2005–2007 and provide a method for determining the temporal variability of aerosol optical properties. Monthly mean aerosol optical thickness (AOT) showed higher values during the warmer months and lower values during the colder months. The single scattering albedo (SSA) and also the imaginary part of the refractive index (k) indicate more absorbing particles during autumn/winter than summer/spring. Aerosol direct radiative forcing measurements are also presented. The monthly change in aerosol radiative forcing was examined at the top of the atmosphere (TOA; from −8.0 to −28.0 W m−2), at the bottom of the atmosphere (BOA; from −19.0 to −55.0 W m−2) and within the atmosphere (ATM; from 11.0 to 35.0 W m−2); the ATM is affected by both the SSA and k. We also investigated the interaction between aerosol optical properties over Thessaloniki and cloud parameters over a region of the Northern Aegean. For the autumn and spring mean monthly values, high correlation coefficients were found between AOT and cloud fraction, the SSA and cloud fraction, AOT and cloud condensation nuclei per square centimetre (CCN/cm2), and cloud optical depth and AOT, and finally a negative correlation was found between AOT and cloud effective radius.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
