A5031267159- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- COVID-19 impact on air quality
- Air Quality and Health Impacts
- Climate variability and models
- Oil, Gas, and Environmental Issues
- Ionosphere and magnetosphere dynamics
- Municipal Solid Waste Management
- Fire effects on ecosystems
- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
Khalifa University of Science and Technology
2023-2024
Indian Institute of Tropical Meteorology
2024
Indian Institute of Remote Sensing
2016-2020
Indian Space Research Organisation
2018-2020
Kumaun University
2018-2020
Government of India
2018
Abstract. This study presents a comprehensive evaluation of the Weather Research and Forecasting model coupled with chemistry (WRF-Chem) in simulating meteorological parameters concentrations air pollutants across United Arab Emirates (UAE) for June December 2022, representing contrasting summer winter climatic conditions. The assessment WRF-Chem performance involves comparisons ground-based observations satellite retrievals from TROPOspheric Monitoring Instrument (TROPOMI) gaseous Moderate...
Widespread forest fire events occurred in the foothills of North Western Himalaya during 24 April to 2 May 2016 (Event-1) and 20–30 2018 (Event-2). Their impacts were investigated on distribution pollutant gases ozone (O3), carbon monoxide (CO), oxides nitrogen (NOx) over Uttarakhand using simulations Weather Research Forecasting model coupled with chemistry (WRF-Chem) in-situ observations these Dehradun, capital Uttarakhand. During Event-1, observed CO mixing ratio Dehradun increased from...
Abstract Summertime convection in the arid United Arab Emirates (UAE) is mostly confined to eastern and northeastern sides of country, known as primary convection. Convection can also occur drier central western parts country; this called secondary However, mechanisms behind latter are still not fully understood, even though it represents a crucial water source hotter months. To end, series real‐case semi‐idealized numerical simulations performed explore role sea breezes emanating from...
In the present study, an intense unseasonal dust storm has been analyzed during third week of March 2012 from multi satellite datasets and surface measurements over National Capital Region (NCR), Delhi. The intrusion study region increased MODIS Aerosol Optical Depth at 550 nm more than 1.0 whereas significant decrease in Angstrom Exponent (α) observed . Very high UV aerosol Index (> 2) location indicates presence absorbing aerosols Fire activities are found to be negligible source...
Abstract. Assessing long-term air quality trends helps evaluate the effectiveness of adopted pollution control policies. A decade SAFAR observations revealed that trend particulate matter (PM2.5 and PM10) in Delhi shows a reduction 2.98 ± 0.53 µg/m3/y (4.91 1.01 µg/m3/y) or overall 29 % (23.7 %) between 2011 2021 while vehicles almost doubled but with implementation cleaner technologies stricter industrial regulation. Seasonal negative pre-monsoon (March-April-May; -3.43 1.02 post-monsoon...
counts to study the influence of this fire episode on air quality over region.HFAP is defined when three days running mean MODIS exceeds median during period (Kumar et al.
Abstract. This study presents a comprehensive evaluation of the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) in simulating meteorological parameters concentrations gaseous pollutants across United Arab Emirates (UAE) for months June December 2018, representing contrasting climatic conditions summer winter. The assessment WRF-Chem performance involved comparisons ground-based observations satellite retrievals from TROPOspheric Monitoring Instrument (TROPOMI)...
Abstract. In the present study, 3-D chemical transport model, MOZART-4 (Model for Ozone and Related Tracers-Version-4) has been used to study seasonal spatial distribution of surface ozone (O3) over India. To illustrate capabilities simulations are compared with ground-based observations. The model reproduces principal features in However, is unable simulate very low concentration O3 during monsoon months. quantify contribution background Indian anthropogenic emissions variability O3. total...