During the Indo-US collaborative Ganges Valley Aerosol Experiment (GVAX), a Doppler Lidar was operated continuously from June 2011 - March 2012 at a high altitude site Manora Peak (29.4o N; 79.2o E; 1958 m, amsl) in the Himalayan foothills. The Doppler Lidar provides height-resolved measurements of vertical velocity and attenuated backscatter over the site. Doppler Lidar and Multi Filter Rotating Shadow band Radiometer (MFRSR) observations are utilized to show wave like signatures in AOD during daytime atmospheric boundary layer (ABL) evolution over the Himalayan region. Fourier analysis depicted 60-80 min periods dominant during afternoon hours, implying that the observed modulations could be plausible reason for the AOD forenoon-afternoon asymmetry which was previously reported. Inclusion of wave amplitude in diurnal variation of aerosol radiative forcing estimates showed ~40% additional warming in the atmosphere relative to mean AOD. We also investigate diurnal and seasonal variation of vertical velocity and attenuated backscatter below 1 km, AGL during the post-monsoon (September-November), winter (December-February) and pre-monsoon (March) seasons. The vertical velocities exhibit a strong diurnal pattern throughout the observational period depicting upslope flows during daytime and down slope flows during nighttime. The magnitude of the vertical velocity varies between 0.1-0.4 m.s-1 in all seasons. The vertical velocity variance ranges from 0.2-1.5 m2s-2 and was found to be higher during daytime due to strong convection followed by a decrease during nighttime due to cooling at the surface. The magnitude of attenuated backscatter varies between -6.5 and -5 m-1sr-1 (represents log10 scale) in all seasons. We also investigated the impact of variable weather conditions on vertical velocity and the results are discussed in the light of the current understanding of the boundary layer dynamics over the observational site.