Browsing Kjemisk institutt by Author "Mikoviny, Tomas"

Now showing items 1-20 of 25

  • Air quality impacts of a large waste fire in Stockholm, Sweden 
    Elihn, Karine; Dalmijn, Joost; Froment, Jean Francois; Håland, Alexander; Johansson, Jana H.; Karlsson, Hanna L.; Martin, Jonathan W.; Mikoviny, Tomas; Norman, Michael; Piel, Felix Maximilian; Sadiktsis, Ioannis; Schlesinger, Daniel; Silvergren, Sanna; Srikanth Vallabani, N. V; Wisthaler, Armin; Steimer, Sarah S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Fires in waste facilities are a common occurrence. Since many waste facilities are located adjacent to densely populated areas, these fires could potentially expose large populations to the emitted pollutants. However, at ...
  • Airborne measurements of particulate organic matter by proton-transfer-reaction mass spectrometry (PTR-MS): a pilot study 
    Piel, Felix; Muller, Markus; Mikoviny, Tomas; Pusede, Sally E.; Wisthaler, Armin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Herein we report on the first successful airborne deployment of the CHemical Analysis of AeRosol ONline (CHARON) particle inlet which allowed us to measure the chemical composition of atmospheric submicrometer particles ...
  • Airborne measurements of western U.S. wildfire emissions: Comparison with prescribed burning and air quality implications 
    Liu, Xiaoxi; Huey, L. Gregory; Yokelson, Robert J.; Selimovic, Vanessa; Simpson, Isobel J.; Müller, Markus; Jimenez, José L.; Campuzano-Jost, Pedro; Beyersdorf, Andreas J.; Blake, Donald R.; Butterfield, Zachary; Choi, Yonghoon; Crounse, John D.; Day, Douglas A.; Diskin, Glenn S.; Dubey, Manvendra K.; Fortner, Edward; Hanisco, Thomas F.; Hu, Weiwei; King, Laura E.; Kleinman, Lawrence; Meinardi, Simone; Mikoviny, Tomas; Onasch, Timothy B.; Palm, Brett B.; Peischl, Jeff; Pollack, Ilana B.; Ryerson, Thomas B.; Sachse, Glen W.; Sedlacek, Arthur J.; Shilling, John D.; Springston, Stephen; St Clair, Jason M.; Tanner, David J.; Teng, Alexander P.; Wennberg, Paul O.; Wisthaler, Armin; Wolfe, Glenn M. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Wildfires emit significant amounts of pollutants that degrade air quality. Plumes from three wildfires in the western U.S. were measured from aircraft during the Studies of Emissions and Atmospheric Composition, Clouds and ...
  • Ambient Measurements of Amines by PTR-QiTOF: Instrument Performance Assessment and Results from Field Measurements in the Vicinity of TCM, Mongstad 
    Mikoviny, Tomas; Nielsen, Claus Jørgen; Tan, Wen; Wisthaler, Armin; Zhu, Liang; Morken, Anne Kolstad; Nilsen, Terje Niøten (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    A PTR-QiTOF instrument was deployed in the field in the vicinity of the CO2 Technology Center Mongstad (TCM) for measuring amines in ambient air. The observed single-to-double-digit pptv levels of dimethylamine (DMA) and ...
  • Ammonia Dry Deposition in an Alpine Ecosystem Traced to Agricultural Emission Hotpots 
    Zondlo, Mark A.; Pan, Da; Benedict, Katherine B.; Golston, Levi M.; Wang, Rui; Collett, Jeffrey L.; Tao, Lei; Sun, Kang; Guo, Xuehui; Ham, Jay; Prenni, Anthony J.; Schichtel, B. A.; Mikoviny, Tomas; Müller, Markus; Wisthaler, Armin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Elevated reactive nitrogen (Nr) deposition is a concern for alpine ecosystems, and dry NH3 deposition is a key contributor. Understanding how emission hotspots impact downwind ecosystems through dry NH3 deposition provides ...
  • An investigation of petrochemical emissions during KORUS-AQ: Ozone production, reactive nitrogen evolution, and aerosol production 
    Lee, Young Ro; Huey, L. Gregory; Tanner, David J.; Takeuchi, Masayuki; Qu, Hang; Liu, Xiaoxi; Ng, Nga Lee; Crawford, James H.; Fried, Alan; Richter, Dirk; Simpson, Isobel J.; Blake, Donald R.; Blake, Nicola J.; Meinardi, Simone; Kim, Saewung; Diskin, Glenn S.; Digangi, Joshua P.; Choi, Yonghoon; Pusede, Sally E.; Wennberg, Paul O.; Kim, Michelle J.; Crounse, John D.; Teng, Alex P.; Cohen, Ronald C.; Romer, Paul S.; Brune, William; Wisthaler, Armin; Mikoviny, Tomas; Jimenez, Jose L.; Campuzano-Jost, Pedro; Nault, Benjamin A.; Weinheimer, Andrew; Hall, Samuel R.; Ullmann, Kirk (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Emissions and secondary photochemical products from the Daesan petrochemical complex (DPCC), on the west coast of South Korea, were measured from the NASA DC-8 research aircraft during the Korea-United States Air Quality ...
  • Atmospheric Chemistry of 2-Amino-2-methyl-1-propanol: A Theoretical and Experimental Study of the OH-Initiated Degradation under Simulated Atmospheric Conditions 
    Tan, Wen; Zhu, Liang; Mikoviny, Tomas; Nielsen, Claus Jørgen; Tang, Yizhen; Wisthaler, Armin; Eichler, Philipp; Müller, Markus; D'Anna, Barbara; Farren, Naomi J.; Hamilton, Jacqueline F.; Pettersson, Jan B. C.; Hallquist, Mattias; Antonsen, Simen Gjelseth; Stenstrøm, Yngve H. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The OH-initiated degradation of 2-amino-2-methyl-1-propanol [CH3C(NH2)(CH3)CH2OH, AMP] was investigated in a large atmospheric simulation chamber, employing time-resolved online high-resolution proton-transfer reaction-t ...
  • Atmospheric chemistry of diazomethane – an experimental and theoretical study 
    Antonsen, Simen Gjelseth; Bunkan, Arne Joakim Coldevin; Mikoviny, Tomas; Nielsen, Claus Jørgen; Stenstrøm, Yngve H.; Wisthaler, Armin; Zardin, Erika (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The kinetics of the O3, OH and NO3 radical reactions with diazomethane were studied in smog chamber experiments employing long-path FTIR and PTR-ToF-MS detection. The rate coefficients were determined to be k CH2NN+O3 =  ...
  • Atmospheric Chemistry of Methyl Isocyanide – an Experimental and Theoretical Study 
    Antonsen, Simen Gjelseth; Bunkan, Arne Joakim Coldevin; Mikoviny, Tomas; Nielsen, Claus Jørgen; Stenstrøm, Yngve H.; Wisthaler, Armin; Zardin, Erika (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The reaction of CH3NC with OH radicals was studied in smog chamber experiments employing PTR-ToF-MS and long-path FTIR detection. The rate coefficient was determined to be kCH3NC+OH = (7.9 ± 0.6) × 10–11 cm3 molecule–1 s–1 ...
  • Atmospheric Chemistry of N-Methylmethanimine (CH3N=CH2): A Theoretical and Experimental Study 
    Bunkan, Arne Joakim Coldevin; Reijrink, Nina G.; Mikoviny, Tomas; Müller, Markus; Nielsen, Claus Jørgen; Zhu, Liang; Wisthaler, Armin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The OH-initiated photo-oxidation of N-methylmethanimine, CH3N═CH2, was investigated in the 200 m3 EUPHORE atmospheric simulation chamber and in a 240 L stainless steel photochemical reactor employing time-resolved online ...
  • Atmospheric Chemistry of tert-butylamine and AMP 
    Antonsen, Simen Gjelseth; Bunkan, Arne Joakim Coldevin; D'Anna, Barbara; Eichler, Philipp; Farren, Naomi J.; Hallquist, Mattias; Hamilton, Jacquiline F.; Kvarnliden, Hampus; Mikoviny, Tomas; Müller, Markus; Nielsen, Claus Jørgen; Stenstrøm, Yngve H.; Tan, Wen; Wisthaler, Armin; Zhu, Liang (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    The atmospheric chemistry of (CH3)3CNH2 (tert-butylamine, tBA) and (CH3)2(CH2OH)CNH2 (2-amino-2-methyl-1-propanol, AMP) has been studied by quantum chemistry methods and in photo-oxidation experiments in the EUPHORE chamber ...
  • Atmospheric Degradation of Amines (ADA) : summary report from atmospheric chemistry studies of amines, nitrosamines, nitramines and amides. 
    Nielsen, Claus Jørgen; D´Anna, Barbara; Bossi, Rossana; Bunkan, Arne Joakim Coldvin; Dithmer, Line; Glasius, Marianne; Hallquist, Mattias; Hansen, Anne Maria K.; Lutz, Anna; Salo, Kent; Maguta, Mihayo Musabila; Nguyen, Quynh; Mikoviny, Tomas; Müller, Markus; Skov, Henrik; Sarrasin, Emmanuel; Stenstrøm, Yngve; Tang, Yizhen; Westerlund, Jonathan; Wisthaler, Armin (Research report / Forskningsrapport, 2012)
    CLIMIT project no. 208122
  • Effect of demand-controlled ventilation strategies on indoor air pollutants in a classroom: A Norwegian case study 
    Yang, Aileen; Andersen, Kamilla Heimar; Hak, Claudia; Mikoviny, Tomas; Wisthaler, Armin; Holøs, Sverre Bjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract The choice of the minimum ventilation rate (V min ) in a demand-controlled ventilation strategy can influence energy demand but also introduce outdoor air pollutants. The latter may have direct health ...
  • Experimental and Theoretical Study of the OH-Initiated Degradation of Piperazine under Simulated Atmospheric Conditions 
    Tan, Wen; Zhu, Liang; Mikoviny, Tomas; Nielsen, Claus Jørgen; Wisthaler, Armin; D´Anna, Barbara; Antonsen, Simen Gjelseth; Stenstrøm, Yngve H.; Farren, Naomi J.; Hamilton, Jacqueline F.; Boustead, Graham A. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The OH-initiated photo-oxidation of piperazine and 1-nitropiperazine as well as the photolysis of 1-nitrosopiperazine were investigated in a large atmospheric simulation chamber. The rate coefficient for the reaction of ...
  • In situ measurements of water uptake by black carbon-containing aerosol in wildfire plumes 
    Perring, Anne E.; Schwarz, Joshua P.; Markovic, Milos Z.; Fahey, David W.; Jimenez, José L.; Campuzano-Jost, Pedro; Palm, Brett D.; Wisthaler, Armin; Mikoviny, Tomas; Diskin, Glenn; Sachse, Glen; Ziemba, Luke; Anderson, Bruce; Shingler, Taylor; Crosbie, Ewan; Sorooshian, Armin; Yokelson, Robert; Gao, Ru-Shan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Water uptake by black carbon (BC)-containing aerosol was quantified in North American wildfire plumes of varying age (1 to ~40 h old) sampled during the SEAC4RS mission (2013). A Humidified Dual SP2 (HD-SP2) is used to ...
  • Measurement report: Emission factors of NH3 and NHx for wildfires and agricultural fires in the United States 
    Tomsche, Laura; Piel, Felix Maximilian; Mikoviny, Tomas; Nielsen, Claus Jørgen; Guo, Hongyu; Campuzano-Jost, Pedro; Nault, Benjamin A.; Schueneman, Melinda K.; Jimenez, Jose L.; Halliday, Hannah; Diskin, Glenn; Digangi, Joshua P.; Nowak, John B.; Wiggins, Elizabeth B.; Gargulinski, Emily; Soja, Amber J.; Wisthaler, Armin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract. During the 2019 Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) study, the NASA DC-8 carried out in situ chemical measurements in smoke plumes emitted from wildfires and agricultural ...
  • New insights into the column CH2O/NO2 ratio as an indicator of near-surface ozone sensitivity 
    Schroeder, Jason R.; Crawford, James H.; Fried, Alan; Walega, James; Weinheimer, Andrew; Wisthaler, Armin; Muller, Markus; Mikoviny, Tomas; Chen, Gao; Shook, Michael; Blake, Donald R; Tonnesen, Gail S (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Satellite-based measurements of the column CH2O/NO2 ratio have previously been used to estimate near-surface ozone (O3) sensitivity (i.e., NOx or VOC limited), and the forthcoming launch of air quality-focused geostationary ...
  • Observation-based modeling of ozone chemistry in the Seoul metropolitan area during the Korea-United States Air Quality Study (KORUS-AQ) 
    Schroeder, Jason R.; Crawford, James H.; Ahn, Joon-Young; Chang, Limseok; Fried, Alan; Walega, James; Weinheimer, Andrew; Montzka, Denise D.; Hall, Samuel R.; Ullmann, Kirk; Wisthaler, Armin; Mikoviny, Tomas; Chen, Gao; Blake, Donald R.; Blake, Nicola J.; Hughes, Stacey C.; Meinardi, Simone; Diskin, Glenn; Digangi, Joshua P.; Choi, Yonghoon; Pusede, Sally E.; Huey, Greg L.; Tanner, David J.; Kim, Michelle; Wennberg, Paul O. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The Seoul Metropolitan Area (SMA) has a population of 24 million and frequently experiences unhealthy levels of ozone (O3). In this work, measurements taken during the Korea-United States Air Quality Study (KORUS-AQ, 2016) ...
  • On the development of a new prototype PTR-ToF-MS instrument and its application to the detection of atmospheric amines 
    Håland, Alexander; Mikoviny, Tomas; Syse, Elisabeth Emilie; Wisthaler, Armin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We herein report on the development of a new prototype PTR-ToF-MS (proton-transfer-reaction time-of-flight mass spectrometry) instrument that combines a hollow cathode glow discharge (HCGD) ion source with a focusing ...
  • On the sources and sinks of atmospheric VOCs: an integratedanalysis of recent aircraft campaigns over North America 
    Chen, Xin; Millet, Dylan B.; Singh, Hanwant B.; Wisthaler, Armin; Apel, Eric C.; Atlas, Elliot L.; Blake, Donald R.; Bourgeois, Ilann; Brown, Steven S.; Crounse, John D.; de Gouw, Joost A.; Flocke, Frank M.; Fried, Alan; Heikes, Brian G.; Hornbrook, Rebecca S.; Mikoviny, Tomas; Min, Kyung-Eun; Müller, Markus; Neuman, J. Andrew; O’Sullivan, Daniel W.; Peischl, Jeff; Pfister, Gabriele G.; Richter, Dirk; Roberts, James M.; Ryerson, Thomas B.; Shertz, Stephen R.; Thompson, Chelsea R.; Treadaway, Victoria; Veres, Patrick R.; Walega, James; Warneke, Carsten; Washenfelder, Rebecca A.; Weibring, Petter K.A.; Yuan, Bin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We apply a high-resolution chemical transport model (GEOS-Chem CTM) with updated treatment of volatile organic compounds (VOCs) and a comprehensive suite of airborne datasets over North America to (i) characterize the VOC ...