Multiyear measurements of aerosols are studied over the central Himalayas in view of the crucial role played by aerosols in climate change, radiation budget, and air quality. The ground based aerosol measurements over the central Himalayan region were utilized to understand aerosol variability and trends at a high altitude site, while the first time absorbing aerosols characterization was made at a low altitude semi urban site in the Indo-Gangetic Plain (IGP) region, adjacent to Himalayan foothills. The ground based examination of aerosols are complemented by space-borne sensors to explain and discuss the surface, columnar, and vertical distribution of aerosols over this region. The roles of meteorological processes such as boundary layer dynamics, convection, regional and long-range transport along with possible sources of aerosols, their seasonality and processes governing the observed concentration or loading are discussed in detail. The aerosol characterization over this region is also discussed in context to other locations. The current state of the science of chemical transport model known as the Weather Research and Forecasting Model coupled with Chemistry (WRF-Chem) was examined for absorbing aerosol, BC. Further, it is shown that agricultural crop residue burning in northern India significantly affects the aerosol load in the central Himalayas which has implications for the atmospheric thermodynamics in this region. These investigations carried out here further motivated to identify the source types of these aerosols and their seasonality in detail. The multiyear data is proposed to use to the source apportionment and estimating aerosol impacts.