Search Results - "Hallquist, M."

Multi-generation OH oxidation as a source for highly oxygenated organic molecules from aromatics by Garmash, Olga, Rissanen, Matti P, Pullinen, Iida, Schmitt, Sebastian, Kausiala, Oskari, Tillmann, Ralf, Zhao, Defeng, Percival, Carl, Bannan, Thomas J, Priestley, Michael, Hallquist, Ãsa M, Kleist, Einhard, Kiendler-Scharr, Astrid, Hallquist, Mattias, Berndt, Torsten, McFiggans, Gordon, Wildt, Jürgen, Mentel, Thomas F, Ehn, Mikael

“…Recent studies have recognised highly oxygenated organic molecules (HOMs) in the atmosphere as important in the formation of secondary organic aerosol (SOA). A…”
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Online characterization of primary and secondary emissions of particulate matter and acidic molecules from a modern fleet of city buses by Zhou, Liyuan, Liu, Qianyun, Salvador, Christian M, Le Breton, Michael, Hallquist, Mattias, Yu, Jian Zhen, Chan, Chak K, Hallquist, Ãsa M

“…The potential impact of transitioning from conventional fossil fuel to a non-fossil-fuel vehicle fleet was investigated by measuring primary emissions via…”
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Secondary organic aerosol reduced by mixture of atmospheric vapours by McFiggans, Gordon, Mentel, Thomas F., Wildt, Jürgen, Pullinen, Iida, Kang, Sungah, Kleist, Einhard, Schmitt, Sebastian, Springer, Monika, Tillmann, Ralf, Wu, Cheng, Zhao, Defeng, Hallquist, Mattias, Faxon, Cameron, Le Breton, Michael, Hallquist, Åsa M., Simpson, David, Bergström, Robert, Jenkin, Michael E., Ehn, Mikael, Thornton, Joel A., Alfarra, M. Rami, Bannan, Thomas J., Percival, Carl J., Priestley, Michael, Topping, David, Kiendler-Scharr, Astrid

“…Secondary organic aerosol contributes to the atmospheric particle burden with implications for air quality and climate. Biogenic volatile organic compounds…”
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Online gas- and particle-phase measurements of organosulfates, organosulfonates and nitrooxy organosulfates in Beijing utilizing a FIGAERO ToF-CIMS by Le Breton, Michael, Wang, Yujue, Hallquist, Åsa M, Pathak, Ravi Kant, Zheng, Jing, Yang, Yudong, Shang, Dongjie, Glasius, Marianne, Bannan, Thomas J, Liu, Qianyun, Chan, Chak K, Percival, Carl J, Zhu, Wenfei, Lou, Shengrong, Topping, David, Wang, Yuchen, Yu, Jianzhen, Lu, Keding, Guo, Song, Hu, Min, Hallquist, Mattias

“…A time-of-flight chemical ionization mass spectrometer (CIMS) utilizing the Filter Inlet for Gas and Aerosol (FIGAERO) was deployed at a regional site 40 km…”
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Characterization of particles from a marine engine operating at low loads by Anderson, Maria, Salo, Kent, Hallquist, Åsa M., Fridell, Erik

“…Particle emissions from a marine diesel engine operating at low loads with four different fuels were characterized with respect to particle number (PN) and…”
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Chemical characterisation of benzene oxidation products under high- and low-NOx conditions using chemical ionisation mass spectrometry by Priestley, Michael, Bannan, Thomas J, Michael Le Breton, Worrall, Stephen D, Kang, Sungah, Iida Pullinen, Schmitt, Sebastian, Tillmann, Ralf, Kleist, Einhard, Zhao, Defeng, Wildt, Jürgen, Garmash, Olga, Mehra, Archit, Asan Bacak, Shallcross, Dudley E, Kiendler-Scharr, Astrid, Hallquist, Åsa M, Ehn, Mikael, Coe, Hugh, Percival, Carl J, Hallquist, Mattias, Mentel, Thomas F, McFiggans, Gordon

“…Aromatic hydrocarbons are a class of volatile organic compounds associated with anthropogenic activity and make up a significant fraction of urban volatile…”
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A transition of atmospheric emissions of particles and gases from on-road heavy-duty trucks by Zhou, Liyuan, Hallquist, Ãsa M, Hallquist, Mattias, Salvador, Christian M, Gaita, Samuel M, Sjödin, Ãke, Jerksjö, Martin, Salberg, Håkan, Wängberg, Ingvar, Mellqvist, Johan, Liu, Qianyun, Lee, Berto P, Chan, Chak K

“…The transition, in extent and characteristics, of atmospheric emissions caused by the modernization of the heavy-duty on-road fleet was studied utilizing…”
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Fresh and Oxidized Emissions from In-Use Transit Buses Running on Diesel, Biodiesel, and CNG by Watne, Ågot K, Psichoudaki, Magda, Ljungström, Evert, Le Breton, Michael, Hallquist, Mattias, Jerksjö, Martin, Fallgren, Henrik, Jutterström, Sara, Hallquist, Åsa M

“…The potential effect of changing to a nonfossil fuel vehicle fleet was investigated by measuring primary emissions (by extractive sampling of bus plumes) and…”
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Application of a FIGAERO ToF CIMS for on-line characterization of real-world fresh and aged particle emissions from buses by Le Breton, M., Psichoudaki, M., Hallquist, M., Watne, Å. K., Lutz, A., Hallquist, Å. M.

“…On-line chemical characterization of real-world particle emissions from 13 transit buses was performed using a chemical ionization mass spectrometer (CIMS)…”
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Molecular Composition and Volatility of Organic Aerosol in the Southeastern U.S.: Implications for IEPOX Derived SOA by Lopez-Hilfiker, F. D, Mohr, C, D’Ambro, E. L, Lutz, A, Riedel, T. P, Gaston, C. J, Iyer, S, Zhang, Z, Gold, A, Surratt, J. D, Lee, B. H, Kurten, T, Hu, W.W, Jimenez, J, Hallquist, M, Thornton, J. A

“…We present measurements as part of the Southern Oxidant and Aerosol Study (SOAS) during which atmospheric aerosol particles were comprehensively characterized…”
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A novel method for online analysis of gas and particle composition: description and evaluation of a Filter Inlet for Gases and AEROsols (FIGAERO) by Lopez-Hilfiker, F. D, Mohr, C, Ehn, M, Rubach, F, Kleist, E, Wildt, J, Mentel, Th. F, Lutz, A, Hallquist, M, Worsnop, D, Thornton, J. A

“…We describe a novel inlet that allows measurement of both gas and particle molecular composition when coupled to mass spectrometric, chromatographic, or…”
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Particle and gaseous emissions from individual diesel and CNG buses by Hallquist, Å. M, Jerksjö, M, Fallgren, H, Westerlund, J, Sjödin, Ã

“…In this study size-resolved particle and gaseous emissions from 28 individual diesel-fuelled and 7 compressed natural gas (CNG)-fuelled buses, selected from an…”
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The formation, properties and impact of secondary organic aerosol: current and emerging issues by Hallquist, M., Wenger, J. C., Baltensperger, U., Rudich, Y., Simpson, D., Claeys, M., Dommen, J., Donahue, N. M., George, C., Goldstein, A. H., Hamilton, J. F., Herrmann, H., Hoffmann, T., Iinuma, Y., Jang, M., Jenkin, M. E., Jimenez, J. L., Kiendler-Scharr, A., Maenhaut, W., McFiggans, G., Mentel, Th. F., Monod, A., Prévôt, A. S. H., Seinfeld, J. H., Surratt, J. D., Szmigielski, R., Wildt, J.

“…Secondary organic aerosol (SOA) accounts for a significant fraction of ambient tropospheric aerosol and a detailed knowledge of the formation, properties and…”
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Chlorine oxidation of VOCs at a semi-rural site in Beijing: significant chlorine liberation from ClNO2 and subsequent gas- and particle-phase Cl–VOC production by Michael Le Breton, Hallquist, Åsa M, Pathak, Ravi Kant, Simpson, David, Wang, Yujue, Johansson, John, Zheng, Jing, Yang, Yudong, Shang, Dongjie, Wang, Haichao, Liu, Qianyun, Chan, Chak, Wang, Tao, Bannan, Thomas J, Priestley, Michael, Percival, Carl J, Shallcross, Dudley E, Lu, Keding, Guo, Song, Hu, Min, Hallquist, Mattias

“…Nitryl chloride (ClNO2) accumulation at night acts as a significant reservoir for active chlorine and impacts the following day's photochemistry when the…”
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Emissions and Secondary Formation of Air Pollutants from Modern Heavy-Duty Trucks in Real-World TrafficChemical Characteristics Using On-Line Mass Spectrometry by Zhou, Liyuan, Salvador, Christian M, Priestley, Michael, Hallquist, Mattias, Liu, Qianyun, Chan, Chak K, Hallquist, Åsa M

“…Complying with stricter emissions standards, a new generation of heavy-duty trucks (HDTs) has gradually increased its market share and now accounts for a large…”
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Evaluation of the point sampling method and inter-comparison of remote emission sensing systems for screening real-world car emissions by Knoll, Markus, Penz, Martin, Schmidt, Christina, Pöhler, Denis, Rossi, Tommaso, Casadei, Simone, Bernard, Yoann, Hallquist, Ǻsa M., Sjödin, Ǻke, Bergmann, Alexander

“…Emissions from internal combustion vehicles are currently not properly monitored throughout their life cycle. Remote emission sensing (RES) is a technology…”
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Concurrent measurements of nitrate at urban and suburban sites identify local nitrate formation as a driver for urban episodic PM2.5 pollution by Li, Jinjian, Ho, Simon C.H., Griffith, Stephen M., Huang, Yeqi, Cheung, Rico K.Y., Hallquist, Mattias, Hallquist, Åsa M., Louie, Peter K.K., Fung, Jimmy C.H., Lau, Alexis K.H., Yu, Jian Zhen

“…Nitrate (NO3−) is often among the leading components of urban particulate matter (PM) during PM pollution episodes. However, the factors controlling its…”
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Variation and co-variation of PM10, particle number concentration, NOx and NO2 in the urban air – Relationships with wind speed, vertical temperature gradient and weather type by Grundström, M., Hak, C., Chen, D., Hallquist, M., Pleijel, H.

“…Atmospheric ultrafine particles (UFP; diameter < 0.1 μm) represent a growing global health concern in urban environments and has a strong link to traffic…”
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Secondary organic aerosol formation from idling gasoline passenger vehicle emissions investigated in a smog chamber by Nordin, E. Z, Eriksson, A. C, Roldin, P, Nilsson, P. T, Carlsson, J. E, Kajos, M. K, Hellén, H, Wittbom, C, Rissler, J, Löndahl, J, Swietlicki, E, Svenningsson, B, Bohgard, M, Kulmala, M, Hallquist, M, Pagels, J. H

“…Gasoline vehicles have recently been pointed out as potentially the main source of anthropogenic secondary organic aerosol (SOA) in megacities. However, there…”
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Onboard Measurements of Nanoparticles from a SCR-Equipped Marine Diesel Engine by Hallquist, Åsa M, Fridell, Erik, Westerlund, Jonathan, Hallquist, Mattias

“…In this study nanoparticle emissions have been characterized onboard a ship with focus on number, size, and volatility. Measurements were conducted on one of…”
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