Profiling of Aerosols and Clouds over High Altitude Urban Atmosphere in Eastern Himalaya: A Ground-Based Observation Using Raman LIDAR

Profiles of aerosols and cloud layers have been investigated over a high-altitude urban atmosphere in the eastern Himalayas India, for first time, using Raman LIDAR. The study was conducted post-monsoon season Darjeeling (latitude 27°01′ N longitude 88°36′ E, 2200 masl), tourist destination north-eastern India. In addition to characterization atmospheric boundary layer detection, profile water vapor mixing ratio has also analyzed. Effects dynamics studied vertical profiles normalized standard deviation RCS along with ratio. aerosol optical characteristics below above Atmospheric Boundary Layer (ABL) region were separately, interrelation their microphysical properties synoptic meteorological parameters. backscatter coefficient extinction found range from 7.15×10−10 m−1 sr−1 3.01×10−5 1.02×10−5 2.28×10−3 m−1, respectively. LIDAR varies between 3.9 78.39 sr all altitudes. variation linear depolarization 0.19 0.32 indicates dominance, non-spherical particles. periodicity observed different parameters may be indicative wave phenomena. Cloud parameters, such as scattering coefficients, top bottom height, depth phases, evaluated. A co-located Micro Rain Radar used life cycle study.