S
Shailesh Kumar Kharol
Researcher at Dalhousie University
Publications - 60
Citations - 3019
Shailesh Kumar Kharol is an academic researcher from Dalhousie University. The author has contributed to research in topics: Aerosol & Angstrom exponent. The author has an hindex of 30, co-authored 56 publications receiving 2472 citations. Previous affiliations of Shailesh Kumar Kharol include Environment Canada & National Remote Sensing Centre.
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Journal ArticleDOI
Effects of crop residue burning on aerosol properties, plume characteristics, and long-range transport over northern India
Dimitris G. Kaskaoutis,Sarvan Kumar,Deepti Sharma,Ramesh P. Singh,Shailesh Kumar Kharol,Manish Sharma,A. K. Singh,Sahadeva Singh,Atinderpal Singh,Darshan Singh +9 more
Abstract: Aerosol emissions from biomass burning are of specific interest over the globe due to their strong radiative impacts and climate implications. The present study examines the impact of paddy crop residue burning over northern India during the postmonsoon (October–November) season of 2012 on modification of aerosol properties, as well as the long-range transport of smoke plumes, altitude characteristics, and affected areas via the synergy of ground-based measurements and satellite observations. During this period, Moderate Resolution Imaging Spectroradiometer (MODIS) images show a thick smoke/hazy aerosol layer below 2–2.5 km in the atmosphere covering nearly the whole Indo-Gangetic Plains (IGP). The air mass trajectories originating from the biomass-burning source region over Punjab at 500 m reveal a potential aerosol transport pathway along the Ganges valley from west to east, resulting in a strong aerosol optical depth (AOD) gradient. Sometimes, depending upon the wind direction and meteorological conditions, the plumes also influence central India, the Arabian Sea, and the Bay of Bengal, thus contributing to Asian pollution outflow. The increased number of fire counts (Terra and Aqua MODIS data) is associated with severe aerosol-laden atmospheres (AOD500 nm > 1.0) over six IGP locations, high values of Angstrom exponent (>1.2), high particulate mass 2.5 (PM2.5) concentrations (>100–150 µgm−3), and enhanced Ozone Monitoring Instrument Aerosol Index gradient (~2.5) and NO2 concentrations (~6 × 1015 mol/cm2), indicating the dominance of smoke aerosols from agricultural crop residue burning. The aerosol size distribution is shifted toward the fine-mode fraction, also exhibiting an increase in the radius of fine aerosols due to coagulation processes in a highly turbid environment. The spectral variation of the single-scattering albedo reveals enhanced dominance of moderately absorbing aerosols, while the aerosol properties, modification, and mixing atmospheric processes differentiate along the IGP sites depending on the distance from the aerosol source, urban influence, and local characteristics.
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High resolution mapping of nitrogen dioxide with TROPOMI: First results and validation over the Canadian oil sands.
Debora Griffin,Xiaoyi Zhao,Chris A. McLinden,Folkert Boersma,Folkert Boersma,Adam Bourassa,Enrico Dammers,Doug Degenstein,Henk Eskes,Lukas Fehr,Vitali Fioletov,Katherine Hayden,Shailesh Kumar Kharol,Shao-Meng Li,Paul A. Makar,Randall V. Martin,C. Mihele,Richard L. Mittermeier,Nickolay A. Krotkov,Maarten Sneep,Lok N. Lamsal,Lok N. Lamsal,Mark ter Linden,Jos van Geffen,Pepijn Veefkind,Pepijn Veefkind,Mengistu Wolde +26 more
TL;DR: The first TROPOMI NO2 measurements near the Canadian Oil Sands are presented and it is shown that these measurements have an outstanding ability to detect NO2 on a very high horizontal resolution that is unprecedented for satellite NO2 observations.
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Long-range transport of aerosols from agriculture crop residue burning in Indo-Gangetic Plains—A study using LIDAR, ground measurements and satellite data
TL;DR: In this paper, Synchronous measurements using micro-pulsed lidar, MICROTOPS-II sun photometer, multi-filter rotating shadow band radiometer (MFRSR) on aerosol optical depth and ground reaching solar irradiance were carried at an urban location in central region of India.
Journal ArticleDOI
Impact of agriculture crop residue burning on atmospheric aerosol loading – a study over Punjab State, India
TL;DR: In this article, the impact of agriculture crop residue burning on aerosol properties during October 2006 and 2007 over Punjab State, India using ground-based measurements and multi-satellite data was examined.
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Long-range transport of dust aerosols over the Arabian Sea and Indian region — A case study using satellite data and ground-based measurements
K. V. S. Badarinath,Shailesh Kumar Kharol,Dimitris G. Kaskaoutis,Anu Rani Sharma,Venkitasubramani Ramaswamy,Harry D. Kambezidis +5 more
TL;DR: In this paper, a time series of Indian geostationary satellite KALPANA-1 Very High Resolution Radiometer (VHRR) together with ground observations are used to analyze the temporal variation of the dust event that occurred from 19 to 24 February 2008 with the strongest intensity on 22 February.