Aerosol optical properties in Gobi region of Mongolia

To accurately study aerosol distribution and composition, continuous observations are required from satellites, networks of ground-based instruments and dedicated field experiments. AERONET Sun-photometer has been used to make measurements of solar radiation and aerosol properties in arid Gobi desert region of Mongolia, Dalanzadgad (43.57722° N, 104.41917° E, and 1470 m above the sea level) site in Mongolia since February 1997. We have analyzed Aerosol Optical Thickness (AOT), and derived Angstrom exponent acquired by an AERONET Sun-photometer at Dalanzadgad. Monthly means computed from quality-assured daily means, seasonal trends are presented and discussed. Spring and early summer has the maximum seasonal average AOT and minimum seasonal average appears in winter of 2002-2003. Monthly average Angstrom exponents are indicates that aerosol mixtures of both coarse and fine mode particles, specially dust aerosol pattern over Dalanzadgad dominantly in spring. This presentation addressed to the aerosol optical properties over arid and semi-arid regions of Mongolia that observed from representative sites of the Global AERONET Sun-photometer and SKYNET Sky Radiometer measurements.