A5000036937- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Wind and Air Flow Studies
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Urban Heat Island Mitigation
- Atmospheric Ozone and Climate
- Aeolian processes and effects
- Fluid Dynamics and Turbulent Flows
- Precipitation Measurement and Analysis
- Radiation Dose and Imaging
- Landslides and related hazards
- Seed Germination and Physiology
- Insect Pest Control Strategies
- Fire effects on ecosystems
- Radio Wave Propagation Studies
- Air Quality Monitoring and Forecasting
- Radioactivity and Radon Measurements
- Remote Sensing and LiDAR Applications
- Date Palm Research Studies
- Disaster Management and Resilience
- Arctic and Antarctic ice dynamics
- 3D Surveying and Cultural Heritage
Indian Institute of Tropical Meteorology
2022-2023
Chinese Academy of Meteorological Sciences
2021-2022
Ministry of Earth Sciences
2022
National Astronomical Research Institute of Thailand
2017-2021
Aryabhatta Research Institute of Observational Sciences
2014-2019
University of Delhi
2014-2016
Abstract. We investigate the time evolution of Local Boundary Layer (LBL) for first over a mountain ridge at Nainital (79.5° E, 29.4° N, 1958 m a.m.s.l.) in central Himalayan region, using radar wind profiler (RWP) during November 2011 to March 2012, as part Ganges Valley Aerosol Experiment (GVAX). restrict our analysis clear–sunny days, resulting total 78 days observations. The standard criterion peak signal-to-noise ratio (S ∕ N) profile was found be inadequate characterization mixed layer...
Abstract. Accurate determination of the planetary boundary layer (PBL) height, mixing height (MLH), and aerosol top (ALT) is critical for air quality climate studies, especially in regions with complex dynamics like Chiang Mai, northern Thailand. This study develops a novel LiDAR-based methodology that incorporates temperature-based dynamic maximum analysis altitude (MAA) to decouple these layers, addressing limitations conventional methods such as Haar Wavelet Covariance Transform (WCT)....
Abstract Large-scale in situ observations are sorely lacking, leading to poor understanding of nationwide atmospheric turbulence over China. Nevertheless, high-resolution soundings have become available starting 2011, providing a unique opportunity investigate across Here, we calculated the mean dissipation rate ( ϵ ) from radiosonde measurements China for period 2011–2018 using Thorpe analysis. The layers that had stronger indicated by larger generally came with length but smaller...
Urbanized mountain valleys are usually prone to episodes of high concentrations air pollutants due the strong interplay between meteorology and synoptic weather conditions. The valley Chiang Mai is engulfed by with particulate matter (PM) concentration remaining above 50 µg m-3 (PM2.5, 24-hour average) during approximately 13 % days every year (mostly February April). This study presents first time continuous measurements mini- micro pulse LiDAR (MiniMPL) installed on floor Mai, providing...
Turbulence kinetic energy (TKE) is widely used to characterize the spatio-temporal changes of atmospheric turbulence. The objective this study investigate near-surface TKE characteristics under different convection regimes classified by ratio buoyancy term (BP) shear (SP) based on sonic anemometer data measured at four boundary layer towers in China with contrasting underlying surfaces. annual average diurnal variations and related variables (BP, SP, friction velocity u∗, wind speed u¯) are...
We present the measurements of cloud-base height variations over Aryabhatta Research Institute Observational Science, Nainital (79.45 degrees E, 29.37 N, 1958 m amsl) obtained from Vaisala Ceilometer, during nearly year-long Ganges Valley Aerosol Experiment (GVAX). The are analysed in conjunction with collocated rainfall, to study possible contributions different cloud types observed monsoonal rainfall June September 2011. summer monsoon 2011 was a normal year total accumulated 1035.8 mm...
Abstract. We investigate the time-evolution of Local Boundary Layer (LBL) for first time over a mountain ridge at Nainital (79.5° E, 29.4° N, 1958 m amsl) in central Himalayan region, using Radar Wind Profiler (RWP) during November 2011 to March 2012, as part Ganges Valley Aerosol Experiment (GVAX). restrict our analysis clear-sunny days, resulting total 78 days observations. The standard criterion peak signal-to-noise ratio (SNR) profile was found be inadequate characterization Mixed (ML)...
Fire has long been used in Southeast Asia for the purposes of cooking, protection, and warmth. However, climate change economic pressure have modified life locals, including fire practices daily other uses. The land use forest cover highland area (mostly deciduous forest) shifted to cultivation, with application slash-and-burn techniques. This results frequent unplanned fires causing pollution form smoke haze. A zero-burn policy implemented tackle this problem but such a may not be...
The physical and mechanical properties of neem (Azadirachta indica) fruit seed relevant to depulping decortication were determined. determined as a function moisture content in the range 6.56 20.71% (w.b). length maximum diameter ranged from 16.21 mm 19.00 11.73 15.09 mm; 11.06 17.57 5.47 10.11 mm, respectively. bulk density, true density porosity decreased with increase content. Angle repose mass increased terminal velocity 8.12-9.12 m.s-1 at 11.3 % seed. shear force (at 20.41% m.c.) dry...
A dryline is the zone of distinct moisture gradient separating warm, moist, and hot, dry air masses. It usually associated with mesoscale phenomena plays a significant role in atmospheric boundary layer (ABL) dynamics including initiation convection/thunderstorms. In tropical Indian region, these conditions are normally pre-monsoon season. present study, characteristics over rain shadow region subcontinent were investigated utilizing observations Weather Research Forecasting (WRF) model from...