Search Results - "Khan, M. Anwar"

Direct kinetic measurements and theoretical predictions of an isoprene-derived Criegee intermediate by Caravan, Rebecca L., Vansco, Michael F., Au, Kendrew, Khan, M. Anwar H., Li, Yu-Lin, Winiberg, Frank A. F., Zuraski, Kristen, Lin, Yen-Hsiu, Chao, Wen, Trongsiriwat, Nisalak, Walsh, Patrick J., Osborn, David L., Percival, Carl J., Lin, Jim Jr-Min, 林志民, Shallcross, Dudley E., Sheps, Leonid, Klippenstein, Stephen J., Taatjes, Craig A., Lester, Marsha I.

“…Isoprene has the highest emission into Earth’s atmosphere of any nonmethane hydrocarbon. Atmospheric processing of alkenes, including isoprene, via ozonolysis…”
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Emissions and Marine Boundary Layer Concentrations of Unregulated Chlorocarbons Measured at Cape Point, South Africa by Say, Daniel, Kuyper, Brett, Western, Luke, Khan, M. Anwar H, Lesch, Timothy, Labuschagne, Casper, Martin, Damien, Young, Dickon, Manning, Alistair J, O’Doherty, Simon, Rigby, Matthew, Krummel, Paul B, Davies-Coleman, Michael T, Ganesan, Anita L, Shallcross, Dudley E

“…Unregulated chlorocarbons, here defined as dichloromethane (CH2Cl2), perchloroethene (C2Cl4), chloroform (CHCl3), and methyl chloride (CH3Cl), are gases not…”
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Experimental Evidence of Dioxole Unimolecular Decay Pathway for Isoprene-Derived Criegee Intermediates by Vansco, Michael F, Caravan, Rebecca L, Zuraski, Kristen, Winiberg, Frank A. F, Au, Kendrew, Trongsiriwat, Nisalak, Walsh, Patrick J, Osborn, David L, Percival, Carl J, Khan, M. Anwar H, Shallcross, Dudley E, Taatjes, Craig A, Lester, Marsha I

“…Ozonolysis of isoprene, one of the most abundant volatile organic compounds emitted into the Earth’s atmosphere, generates two four-carbon unsaturated Criegee…”
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Direct Measurements of Unimolecular and Bimolecular Reaction Kinetics of the Criegee Intermediate (CH3)2COO by Chhantyal-Pun, Rabi, Welz, Oliver, Savee, John D, Eskola, Arkke J, Lee, Edmond P. F, Blacker, Lucy, Hill, Henry R, Ashcroft, Matilda, Khan, M. Anwar H, Lloyd-Jones, Guy C, Evans, Louise, Rotavera, Brandon, Huang, Haifeng, Osborn, David L, Mok, Daniel K. W, Dyke, John M, Shallcross, Dudley E, Percival, Carl J, Orr-Ewing, Andrew J, Taatjes, Craig A

“…The Criegee intermediate acetone oxide, (CH3)2COO, is formed by laser photolysis of 2,2-diiodopropane in the presence of O2 and characterized by synchrotron…”
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Do diverse wheat genotypes unleash their biochemical arsenal differentially to conquer cold stress? A comprehensive study in the Western Himalayas by Jan, Sofora, Kumar, Sandeep, Yousuf, Munaza, Shafi, Safoora, Majid, Ronak, Khan, M. Anwar, Jeelani, Fehim, Shikari, Asif Bashir, Kaur, Satinder, Kumar, Sundeep, Kalia, Sanjay, Singh, Kuldeep, Prasad, Manoj, Varshney, Rajeev K., Mir, Reyazul Rouf

“…Wheat is one of the most important cereal crops in the world. Cold stress is a major constraint in production of wheat grown in cold climate regions. In this…”
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Aerosol mass and size-resolved metal content in urban Bangkok, Thailand by Matthews, James C., Navasumrit, Panida, Wright, Matthew D., Chaisatra, Krittinee, Chompoobut, Chalida, Arbon, Robert, Khan, M. Anwar H., Ruchirawat, Mathuros, Shallcross, Dudley E.

“…Inhalable particulate matter (PM) is a health concern, and people living in large cities such as Bangkok are exposed to high concentrations. This exposure has…”
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Reaction of Perfluorooctanoic Acid with Criegee Intermediates and Implications for the Atmospheric Fate of Perfluorocarboxylic Acids by Taatjes, Craig A, Khan, M. Anwar H, Eskola, Arkke J, Percival, Carl J, Osborn, David L, Wallington, Timothy J, Shallcross, Dudley E

“…The reaction of perfluorooctanoic acid with the smallest carbonyl oxide Criegee intermediate, CH2OO, has been measured and is very rapid, with a rate…”
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Particle Number Concentration Measurements on Public Transport in Bangkok, Thailand by Matthews, James C, Chompoobut, Chalida, Navasumrit, Panida, Khan, M Anwar H, Wright, Matthew D, Ruchirawat, Mathuros, Shallcross, Dudley E

“…Traffic is a major source of particulate pollution in large cities, and particulate matter (PM) level in Bangkok often exceeds the World Health Organisation…”
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Airborne observations over the North Atlantic Ocean reveal the importance of gas-phase urea in the atmosphere by Matthews, Emily, Bannan, Thomas J, Khan, M Anwar H, Shallcross, Dudley E, Stark, Harald, Browne, Eleanor C, Archibald, Alexander T, Mehra, Archit, Bauguitte, Stéphane J-B, Reed, Chris, Thamban, Navaneeth M, Wu, Huihui, Barker, Patrick, Lee, James, Carpenter, Lucy J, Yang, Mingxi, Bell, Thomas G, Allen, Grant, Jayne, John T, Percival, Carl J, McFiggans, Gordon, Gallagher, Martin, Coe, Hugh

“…Reduced nitrogen (N) is central to global biogeochemistry, yet there are large uncertainties surrounding its sources and rate of cycling. Here, we present…”
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Investigation of Biofuel as a Potential Renewable Energy Source by Khan, M. Anwar H., Bonifacio, Sophia, Clowes, Joanna, Foulds, Amy, Holland, Rayne, Matthews, James C., Percival, Carl J., Shallcross, Dudley E.

“…An accelerating global energy demand, paired with the harmful environmental effects of fossil fuels, has triggered the search for alternative, renewable energy…”
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Atmospheric HCFC-22, HFC-125, and HFC-152a at Cape Point, South Africa by Kuyper, Brett, Say, Daniel, Labuschagne, Casper, Lesch, Timothy, Joubert, Warren R, Martin, Damien, Young, Dickon, Khan, M. Anwar H, Rigby, Matthew, Ganesan, Anita L, Lunt, Mark F, O’Dowd, Colin, Manning, Alistair J, O’Doherty, Simon, Davies-Coleman, Michael T, Shallcross, Dudley E

“…One hydrochlorofluorocarbon and two hydrofluorocarbons (HCFC-22, HFC-125, and HFC-152a) were measured in air samples at the Cape Point observatory (CPT), South…”
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Direct gas-phase formation of formic acid through reaction of Criegee intermediates with formaldehyde by Luo, Pei-Ling, Chen, I-Yun, Khan, M. Anwar H., Shallcross, Dudley E.

“…Ozonolysis of isoprene is considered to be an important source of formic acid (HCOOH), but its underlying reaction mechanisms related to HCOOH formation are…”
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Rate Coefficients of C1 and C2 Criegee Intermediate Reactions with Formic and Acetic Acid Near the Collision Limit: Direct Kinetics Measurements and Atmospheric Implications by Welz, Oliver, Eskola, Arkke J., Sheps, Leonid, Rotavera, Brandon, Savee, John D., Scheer, Adam M., Osborn, David L., Lowe, Douglas, Murray Booth, A., Xiao, Ping, Anwar H. Khan, M., Percival, Carl J., Shallcross, Dudley E., Taatjes, Craig A.

“…Rate coefficients are directly determined for the reactions of the Criegee intermediates (CI) CH2OO and CH3CHOO with the two simplest carboxylic acids, formic…”
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Improvements to the representation of BVOC chemistry–climate interactions in UKCA (v11.5) with the CRI-Strat 2 mechanism: incorporation and evaluation by Weber, James, Archer-Nicholls, Scott, Abraham, Nathan Luke, Shin, Youngsub M, Bannan, Thomas J, Percival, Carl J, Bacak, Asan, Artaxo, Paulo, Jenkin, Michael, Khan, M. Anwar H, Shallcross, Dudley E, Schwantes, Rebecca H, Williams, Jonathan, Archibald, Alex T

“…We present the first incorporation of the Common Representative Intermediates version 2.2 tropospheric chemistry mechanism, CRI v2.2, combined with…”
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An Estimation of the Levels of Stabilized Criegee Intermediates in the UK Urban and Rural Atmosphere Using the Steady‐State Approximation and the Potential Effects of These Intermediates on Tropospheric Oxidation Cycles by H. Khan, M. Anwar, Morris, William C., Galloway, Matthew, A. Shallcross, Beth M., Percival, Carl J., Shallcross, Dudley E.

“…ABSTRACT Levels of the stabilized Criegee Intermediate (sCI), produced via the ozonolysis of unsaturated volatile organic compounds (VOCs), were estimated at…”
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The reaction of hydroxyl and methylperoxy radicals is not a major source of atmospheric methanol by Caravan, Rebecca L., Khan, M. Anwar H., Zádor, Judit, Sheps, Leonid, Antonov, Ivan O., Rotavera, Brandon, Ramasesha, Krupa, Au, Kendrew, Chen, Ming-Wei, Rösch, Daniel, Osborn, David L., Fittschen, Christa, Schoemaecker, Coralie, Duncianu, Marius, Grira, Asma, Dusanter, Sebastien, Tomas, Alexandre, Percival, Carl J., Shallcross, Dudley E., Taatjes, Craig A.

“…Methanol is a benchmark for understanding tropospheric oxidation, but is underpredicted by up to 100% in atmospheric models. Recent work has suggested this…”
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Investigating the Effect of Fine Particulate Matter (PM2.5) Emission Reduction on Surface-Level Ozone (O3) during Summer across the UK by Curley, Lydia, Holland, Rayne, Khan, M. Anwar H., Shallcross, Dudley E.

“…UK air pollutant data collected over a 10-year period (2010–2019) from 46 sites with Urban Traffic, Urban Background, Suburban Background, Rural Background,…”
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Reaction between CH3O2 and BrO Radicals: A New Source of Upper Troposphere Lower Stratosphere Hydroxyl Radicals by Shallcross, Dudley E, Leather, Kimberley E, Bacak, Asan, Xiao, Ping, Lee, Edmond P. F, Ng, Maggie, Mok, Daniel K. W, Dyke, John M, Hossaini, Ryan, Chipperfield, Martyn P, Khan, M. Anwar H, Percival, Carl J

“…Over the last two decades it has emerged that measured hydroxyl radical levels in the upper troposphere are often underestimated by models, leading to the…”
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Criegee Intermediate–Alcohol Reactions, A Potential Source of Functionalized Hydroperoxides in the Atmosphere by McGillen, Max R, Curchod, Basile F.E, Chhantyal-Pun, Rabi, Beames, Joseph M, Watson, Nathan, Khan, M. Anwar H, McMahon, Laura, Shallcross, Dudley E, Orr-Ewing, Andrew J

“…Ozonolysis, the mechanism by which alkenes are oxidized by ozone in the atmosphere, produces a diverse family of oxidants known as Criegee intermediates (CIs)…”
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Elucidating the Effects of COVID-19 Lockdowns in the UK on the O3-NOx-VOC Relationship by Holland, Rayne, Seifert, Katya, Saboya, Eric, Khan, M. Anwar H., Derwent, Richard G., Shallcross, Dudley E.

“…The unprecedented reductions in anthropogenic emissions over the COVID-19 lockdowns were utilised to investigate the response of ozone (O3) concentrations to…”
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