Howard Beltsville/IRB Research Data GRUAN An initiative of the World Meteorological Organization. The site is the only university-based GRUAN station in the world. Aerosols and Pollution An instrumented site maintained by the Maryland Department of the Environment measurement pollutants and winds. Micro Meteorology A 30 meter instrumented tower permits boundary layer flux studies Halo Doppler Lidar Raman Lidar Studies of Aerosols, Water Vapor, Clouds, Temperature. Ceilometer studies of boundary layer evolution. Radiative transfer The influence of aerosols and clouds on light propagation through the atmosphere. Numerical Models Various Modeling Results. HU BeltsvilleWeekly Ozonesonde Launch Ozonesonde measurements at the Howard University Beltsville Campus(2004 to present) Ceilometers at IRB and Beltsville Ceilometers CL 61 and Lufft AERONET at IRB AERONET