A5005926944- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Climate change impacts on agriculture
- Hydrology and Drought Analysis
- Oceanographic and Atmospheric Processes
- Atmospheric Ozone and Climate
- Precipitation Measurement and Analysis
- Cryospheric studies and observations
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Ocean Waves and Remote Sensing
- Geophysics and Gravity Measurements
- Agricultural Economics and Practices
- Calibration and Measurement Techniques
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Arctic and Antarctic ice dynamics
- Rice Cultivation and Yield Improvement
- Satellite Image Processing and Photogrammetry
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Plant Water Relations and Carbon Dynamics
- Planetary Science and Exploration
- earthquake and tectonic studies
Banaras Hindu University
2016-2025
Indian Institute of Technology BHU
2023
Indian Institute of Technology Delhi
2002-2005
Indian Institute of Technology Indore
2005
ABSTRACT An endeavour is made to investigate the performance of convective parameterization schemes on simulation South Asian summer monsoon features through a regional climate model ( RegCM ). For this purpose, version 4.3 developed by International Center for Theoretical Physics ICTP ) used experiments in Coordinated Regional Climate Downscaling Experiment CORDEX framework over Asia domain. Four schemes, namely, Emanuel, Grell, Tiedtke and mixed scheme (Emanuel land Grell ocean) are...
Abstract The first detailed validation of maximum temperature Modern‐Era Retrospective analysis for Research and Application Version 2 ( T MERRA‐2 ) against Indian Meteorological Department IMD has been carried out 35 years (1981–2015) over India. For this purpose, India divided into seven different zones, i.e Western Himalaya (WH), Northwest, North Central, Northeast (NE), West Peninsula India, East South descriptive statistics correlation between have determined monthly, seasonal, annual...
Diurnal temperature range (DTR) is an important indicator of climatic change and a critical thermal metric to assess the impact on agriculture human health. This study investigates seasonal, annual decadal changes in spatio-temporal trend DTR air temperatures (maximum: Tmax minimum: Tmin) during 1951–2016 solar radiation (Srad) 1984–2016 over 14 different agro-climatic zones (ACZs) India. The between two time periods:1951–2016 1991–2016 (recent period) are also assessed. results indicate...
Abstract The Indo‐Gangetic Plain (IGP) bears great agricultural importance and contributes to a major share of national GDP India. In present study, location‐specific comprehensive analysis rainfall extremes over IGP, using second generation CORDEX‐CORE simulations in the future scenarios (under high emission RCP8.5 scenario) have been performed. Here, high‐resolution with International Centre for Theoretical Physics's regional climate model (RegCM4.7) considered detailed characteristics...
Dynamic and thermodynamic characteristics of the Asian summer monsoon during onset phase over Indian Peninsula (Kerala coast) its variability are examined with reanalysis data sets. For this study, daily averaged (0000 1200 UTC) sets National Centre for Environmental Prediction–National Atmospheric Research period 1948–99 used. Based on 52 years dates monsoon, we categorized pre-onset, post-onset periods (each 5 days) to investigate mean circulation large-scale energetics monsoon. It is...
Abstract The present study delineates the relative performance of 3D‐Var and 4D‐Var data assimilation (DA) techniques in regional NCUM‐R model to simulate three heavy rainfall events (HREs) over Indian region. Four numerical experiments for extreme cases were conducted by assimilating different combinations observations from surface, aircraft, upper‐air satellite‐derived Atmospheric Motion Vectors (AMVs) using techniques. These generated initial conditions (ICs) forecast HREs. Key...
Abstract An effort was made to investigate the impact of assimilation microwave imager (MI) radiance observations on simulation tropical cyclones (TCs) using high‐resolution NCUM‐4DVAR method. Two numerical experiments were performed: a control experiment (CTL) (assimilated global telecommunication system [GTS] observations) and satellite (SAT) GTS plus [GMI] special sensor sounder [SSMIS] MI radiance). Assimilation is observed be capable depicting structure, track intensity storms. The...
Estimating criteria pollutants is crucial due to their continuous increase and impact on respiratory health. To mitigate the of air pollution human health, it essential understand concentration at specific locations. This study aims evaluate variation, estimate levels pollutants, assess potential health risks in vicinity a coal mine complex thermal power plant situated an eastern coastal state India. The pre-existing hot spot regions—Talcher (T) Brajrajnagar (B)—which host many coal-fired...
The Himalayan mountain system is the source of one world's largest supplies freshwater, as all major south Asian rivers originate in Himalayas and their upper catchments are covered with snow glaciers. There have been no studies describing large-scale pattern snowmelt over this region. In order to develop a physically based distributed snowmelt-runoff model, study on variability snowfall essential. Therefore, for first time, accumulation ablation has undertaken Remotely sensed water...
Abstract The evaluation of Weather Research and Forecasting (WRF) model has been performed for simulating episodic Heat Wave (HW) events 2015 2016 with varied horizontal resolutions 27 km the entire India (d01), 9 North West (NW (d02)) South East (SE (d03)) domain. Study compares maximum temperature (T max ) simulated by WRF model, using six different combination parameterization schemes, observations from Meteorological Department (IMD) during HW events. Among experiments, Exp2 (i.e., WSM6...