A5051441920- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- COVID-19 impact on air quality
- Wind and Air Flow Studies
- Flood Risk Assessment and Management
- Impact of Light on Environment and Health
- Climate Change and Health Impacts
- Fire effects on ecosystems
- Energy, Environment, Economic Growth
- Tropical and Extratropical Cyclones Research
Ministry of Earth Sciences
2020-2024
Savitribai Phule Pune University
2019-2024
Indian Institute of Tropical Meteorology
2019-2024
Indian Institute of Science Bangalore
2021
India Meteorological Department
2021
Purdue University West Lafayette
2021
Indian Institute of Technology Bhubaneswar
2021
Centre for Development of Advanced Computing
2021
Indian Institute of Technology Roorkee
2021
Indian Space Research Organisation
2021
Abstract This study reports a very high-resolution (400 m grid-spacing) operational air quality forecasting system developed to alert residents of Delhi and the National Capital Region (NCR) about forthcoming acute pollution episodes. Such has been for first time is evaluated during October 2019-February 2020. The assimilates near real-time aerosol observations from in situ space-borne platform Weather Research Forecasting model coupled with Chemistry (WRF-Chem) produce 72-h forecast daily...
Abstract The presence of persistent heavy fog in northern India during winter creates hazardous situations for transportation systems and disrupts the lives about 400 million people. meteorological factors responsible its genesis predictability are not yet completely understood this region. Given high potential socioeconomic impact, there is a pressing need extensive research that understands inherently complex nature phenomena through field observations modeling exercises. WiFEX...
Abstract This paper examines the accuracy of Weather Research and Forecasting model coupled with Chemistry (WRF‐Chem) generated 72 hr fine particulate matter (PM 2.5 ) forecasts in Delhi during crop residue burning season October‐November 2017 respect to assimilation Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) retrievals, persistent fire emission assumption, aerosol‐radiation interactions. The significantly pushes AOD PM toward observations largest...
Air quality has become one of the most important environmental concerns for Delhi, India.In this perspective, we have developed a high-resolution air prediction system Delhi based on chemical data assimilation in transport model -Weather Research and Forecasting with Chemistry (WRF-Chem).The was applied to improve PM2.5 forecast via MODIS aerosol optical depth retrievals using threedimensional variational analysis scheme.Near real-time fire count were simultaneously adjust fire-emission...
Abstract. This paper discusses the newly developed Decision Support System version 1.0 (DSS v1.0) for air quality management activities in Delhi, India. In addition to standard forecasts, DSS provides contribution of its surrounding districts, and stubble-burning fires neighboring states Punjab Haryana PM2.5 load Delhi. also quantifies effects local neighborhood emission-source-level interventions on pollution The DSS-simulated Air Quality Index post-monsoon winter seasons 2021–2022 shows...
Abstract A Winter Fog Experiment (WiFEX) was conducted to study the genesis of fog formation between winters 2016–17 and 2017–18 at Indira Gandhi International Airport (IGIA), Delhi, India. To support WiFEX field campaign, Weather Research Forecasting (WRF) Model used produce real-time forecasts 2-km horizontal grid spacing. This paper summarizes performance model for 43 very dense episodes (visibility < 200 m) preliminary evaluation against observations. Similarly, near-surface...
This study investigates the impact of black carbon (BC) emissions on monsoon rainfall patterns across Indian subcontinent. The results show that BC exerts localized warming effects, providing valuable insights into mechanisms influencing distribution landmass. analyzes vertical profile mean tropospheric temperature differences between two sets simulations: (i) with default (WBC) and (ii) reduced by 99% (WoBC), conducted for JJAS, 2017, focusing region along eastern coast. analysis variations...
Abstract Air pollution poses a significant environmental risk to large cities worldwide, including New Delhi, India's capital. Occurrence of frequent episodes elevated levels air during October March in Delhi and National Capital Tertiary (Delhi-NCT) chokes its ∼32 million residents every year. Current quality models lack the ability accurately predict severe events Delhi-NCT, rendering decision-makers helpless their efforts safeguard public health. To address this, new initiative introduced...
We investigated the diurnal variation of tropospheric nitrogen dioxide (NO2) over a cluster high emission thermal power plants (HETPPs) in India using two products from satellite-based UV/Visible spectrometers together with chemistry-transport-model. The different overpass times satellite spectrometers: SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) (1030 h LT) and Ozone Monitoring Instrument (OMI) (1330 LT)), enable detection changes NO2 columns at day,...
Abstract. Elevated levels of fine particulate matter (PM2.5) during winter-time have become one the most important environmental concerns over Indo-Gangetic Plain (IGP) region India, and particularly for Delhi. Accurate reconstruction PM2.5, its optical properties, dominant chemical components this is essential to evaluate performance air quality models. In study, we investigated effect three different aerosol mechanisms coupled with gas-phase schemes on simulated PM2.5 mass concentration in...
Abstract. This paper discusses the newly developed Decision Support System version 1.0 (DSS v1.0) for air quality management activities in Delhi, India. In addition to standard forecasts, DSS provides contribution of its surrounding districts, and stubble-burning fires neighboring states Punjab Haryana PM2.5 load Delhi. also quantifies effects local neighborhood emission-source-level interventions on pollution The DSS-simulated Air Quality Index post-monsoon winter seasons 2021–22 shows high...
Abstract Global urban population is projected to double by 2050. This rapid urbanization the driver of economic growth but has environmental challenges. To that end, there an urgent need understand, simulate, and disseminate information about extreme events, routine city operations, long-term planning decisions. paper describes effort underway in India involving interdisciplinary community meteorology, hydrology, air quality, computer science from national international institutes. The...
To improve ambient air quality, India has laid out strict action plans to reduce the increment in emissions over regional urban scale by year 2030. This study evaluates policy-induced improvement quality and associated health benefits achievable due reduction PM2.5 exposure under adoption of promulgated (S2) ambitious prospective regulations (S3) with respect scenario for Business As Usual (BAU) The Weather Research Forecasting model coupled online chemistry (WRF-Chem) been used simulate...
The size-resolved compositional analysis of non-refractory submicron aerosol (NR-PM1) was conducted using the Aerodyne High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) instrument over Pune, India during COVID-19 lockdown period. composition data shows predominant presence organics (Org) in mass fraction followed by sulfate, ammonium, nitrate, and chloride pre-lockdown periods. showed unimodal size distribution organic inorganic constituents with peaks at 550 nm, implying...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Nature Scientific Reports. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v2]Real-time PM 2.5 forecast over Delhi: Performance of high resolution (400 m) WRF-Chem model integrated with data assimilation dynamical downscalingAuthorsChinmay...