Respond Projects

Atmosphere and Climate

Transport of chemical constituents of atmosphere using WRF chemical transfer modelling

Atmospheric dynamics lead to dispersion and transport of chemical constituents in atmosphere from their source regions to distant locations. In order to understand effects of chemical constituents in earth atmosphere, their transport from source regions to other locations has to be examined. Transport of chemical constituents in atmosphere can be investigated in detail using models such as WRF. 1. Identification of trace gases and understanding their chemistry mechanism using available satellite and ground data. 2. Study of trace gases dispersion using WRF model. 3. Study of chemical mechanism between the species using WRF-Chem model. 4. Generate alert mechanism on pollutant concentration and their transport

Study of boundary layer dynamics (NRSC/NESAC) Atmospheric Boundary Layer (ABL) is the lowest part of troposphere, which is directly influenced by earth surface and responds to surface forcing with a time scale of an hour or less. Structure of ABL and associated dynamics are important to understand weather, climate, pollution dispersion and exchange processes between surface and atmosphere. The lower layer of the atmosphere, the boundary layer, acts as a conduit for exchange of energy and mass between the surface and the atmosphere. Measurements of the vertical profile of meteorological parameters are essential to study temporal variations in the boundary layer, especially in the lower layers. As the boundary layer varies greatly depending upon the surface characteristics, extensive sampling over different regions is required to accurately represent the boundary layer in numerical models. The 32m meteorological tower at NRSC, Shadnagar is an example of a boundary layer measurement system at a semi-arid region.