Armin Wisthaler

• Antonsen, Simen Gjelseth; Bunkan, Arne Joakim Coldevin; Mikoviny, Tomas; Nielsen, Claus Jørgen; Stenstrøm, Yngve H.; Wisthaler, Armin & Zardin, Erika (2020). Atmospheric Chemistry of Methyl Isocyanide – an Experimental and Theoretical Study. Journal of Physical Chemistry A.  ISSN 1089-5639.  124(32), s 6562- 6571 . doi: 10.1021/acs.jpca.0c05127 Fulltekst i vitenarkiv.
• Antonsen, Simen Gjelseth; Bunkan, Arne Joakim Coldevin; Mikoviny, Tomas; Nielsen, Claus Jørgen; Stenstrøm, Yngve H.; Wisthaler, Armin & Zardin, Erika (2020). Atmospheric chemistry of diazomethane – an experimental and theoretical study. Molecular Physics.  ISSN 0026-8976.  s 1- 8 . doi: 10.1080/00268976.2020.1718227 Fulltekst i vitenarkiv.
• Cassagnes, L.E.; Leni, Z.; Håland, Alexander; Bell, D.M.; Zhu, Liang; Bertrand, A.; Baltensperger, Urs; El Haddad, Imad; Wisthaler, Armin; Geiser, Marianne & Dommen, Josef (2020). Online monitoring of volatile organic compounds emitted from human bronchial epithelial cells as markers for oxidative stress. Journal of Breath Research.  ISSN 1752-7155.  15(1) . doi: 10.1088/1752-7163/abc055 Fulltekst i vitenarkiv.
• Chen, Jianjun; Yin, Dazhong; Zhao, Zhan; Kaduwela, Ajith; Avise, Jeremy; DaMassa, John; Beyersdorf, Andreas; Burton, Sharon; Ferrare, Richard; Herman, Jay; Kim, Hwajin; Neuman, Andy; Nowak, John; Parworth, Caroline; Scarino, Amy; Wisthaler, Armin; Young, Dominique & Zhang, Qi (2020). Modeling air quality in the San Joaquin valley of California during the 2013 Discover-AQ field campaign. Atmospheric Environment: X.  ISSN 2590-1621.  5, s 1- 15 . doi: 10.1016/j.aeaoa.2020.100067 Fulltekst i vitenarkiv.
• H. Souri, Amir; R. Nowlan, Caroline; Gonzalez Abad, Gonzalo; Zhu, Lei; R. Blake, Donald; Fried, Alan; J. Weinheimer, Andrew; Wisthaler, Armin; Woo, Jung-Hun; Zhang, Qiang; E. Chan Miller, Christopher; Liu, Xiong & Chance, Kelly (2020). An inversion of NOx and non-methane volatile organic compound (NMVOC) emissions using satellite observations during the KORUS-AQ campaign and implications for surface ozone over East Asia. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  20(16), s 9837- 9854 . doi: 10.5194/acp-20-9837-2020 Fulltekst i vitenarkiv.
• Müller, Markus; Piel, Felix; Gutmann, Rene; Sulzer, Philipp; Hartungen, Eugen & Wisthaler, Armin (2020). A novel method for producing NH4+ reagent ions in the hollow cathode glow discharge ion source of PTR-MS instruments. International Journal of Mass Spectrometry.  ISSN 1387-3806.  447:116254, s 1- 4 . doi: 10.1016/j.ijms.2019.116254 Fulltekst i vitenarkiv.
• 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. (2020). Observation-based modeling of ozone chemistry in the Seoul metropolitan area during the Korea-United States Air Quality Study (KORUS-AQ). Elementa: Science of the Anthropocene.  ISSN 2325-1026.  8(1) . doi: 10.1525/elementa.400 Fulltekst i vitenarkiv.
• Schwantes, Rebecca H.; Emmons, Louisa; Orlando, John J.; Barth, Mary C.; Tyndall, Geoffrey S.; Hall, Samuel R.; Ullmann, Kirk; St. Clair, Jason M.; Blake, Donald R.; Wisthaler, Armin & Paul V. Bui, Thao (2020). Comprehensive isoprene and terpene gas-phase chemistry improves simulated surface ozone in the southeastern US. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  20(6), s 3739- 3776 . doi: 10.5194/acp-20-3739-2020 Fulltekst i vitenarkiv.
• 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.; Brennan, Alexander D.; Ingham, Trevor & Heard, Dwayne E. (2020). Experimental and Theoretical Study of the OH-Initiated Degradation of Piperazine under Simulated Atmospheric Conditions. Journal of Physical Chemistry A.  ISSN 1089-5639. . doi: 10.1021/acs.jpca.0c10223 Fulltekst i vitenarkiv.
• Wang, Zelong; Yuan, Bin; Ye, Chenshuo; Roberts, James M.; Wisthaler, Armin; Lin, Yi; Li, Tiange; Wu, Caihong; Peng, Yuwen; Wang, Chaomin; Wang, Sihang; Yang, Suxia; Wang, Baolin; Qi, Jipeng; Wang, Chen; Song, Wei; Hu, Weiwei; Wang, Xinming; Xu, Wanyun; Ma, Nan; Kuang, Ye; Tao, Jiangchuan; Zhang, Zhanyi; Su, Hang; Cheng, Yafang; Wang, Xuemei & Shao, Min (2020). High Concentrations of Atmospheric Isocyanic Acid (HNCO) Produced from Secondary Sources in China. Environmental Science and Technology.  ISSN 0013-936X.  54(19), s 11818- 11826 . doi: 10.1021/acs.est.0c02843 Fulltekst i vitenarkiv.
• Wells, Kelley C.; Millet, Dylan B.; Payne, Vivienne H.; Deventer, M. Julian; Bates, Kelvin H.; De Gouw, Joost; Graus, Martin; Warneke, Carsten; Wisthaler, Armin & Fuentes, Jose D. (2020). Satellite isoprene retrievals constrain emissions and atmospheric oxidation. Nature.  ISSN 0028-0836.  585(7824), s 225- 233 . doi: 10.1038/s41586-020-2664-3
• Behrenfeld, Michael J.; Moore, Richard H.; Hostetler, Chris A.; Graff, Jason; Gaube, Peter; Russell, Lynn M.; Chen, Gao; Doney, Scott C.; Giovannoni, Stephen; Liu, Hongyu; Proctor, Christopher; Bolaños, Luis M.; Baetge, Nicholas; Davie-Martin, Cleo; Westberry, Toby K.; Bates, Timothy S.; Bell, Thomas G.; Bidle, Kay D.; Boss, Emmanuel S.; Brooks, Sarah D.; Cairns, Brian; Carlson, Craig; Halsey, Kimberly; Harvey, Elizabeth L.; Hu, Chuanmin; Karp-Boss, Lee; Kleb, Mary; Menden-Deuer, Susanne; Morison, Françoise; Quinn, Patricia K.; Scarino, Amy Jo; Anderson, Bruce; Chowdhary, Jacek; Crosbie, Ewan; Ferrare, Richard; Hair, Johnathan W.; Hu, Yongxiang; Janz, Scott; Redemann, Jens; Saltzman, Eric; Shook, Michael; Siegel, David A.; Wisthaler, Armin; Martin, Melissa Yang & Ziemba, Luke (2019). The North Atlantic Aerosol and Marine Ecosystem Study (NAAMES): Science motive and mission overview. Frontiers in Marine Science.  ISSN 2296-7745.  6:122, s 1- 25 . doi: 10.3389/fmars.2019.00122 Vis sammendrag

  The North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) is an interdisciplinary investigation to improve understanding of Earth's ocean ecosystem-aerosol-cloud system. Specific overarching science objectives for NAAMES are to (1) characterize plankton ecosystem properties during primary phases of the annual cycle and their dependence on environmental forcings, (2) determine how these phases interact to recreate each year the conditions for an annual plankton bloom, and (3) resolve how remote marine aerosols and boundary layer clouds are influenced by plankton ecosystems. Four NAAMES field campaigns were conducted in the western subarctic Atlantic between November 2015 and April 2018, with each campaign targeting specific seasonal events in the annual plankton cycle. A broad diversity of measurements were collected during each campaign, including ship, aircraft, autonomous float and drifter, and satellite observations. Here, we present an overview of NAAMES science motives, experimental design, and measurements. We then briefly describe conditions and accomplishments during each of the four field campaigns and provide information on how to access NAAMES data. The intent of this manuscript is to familiarize the broad scientific community with NAAMES and to provide a common reference overview of the project for upcoming publications.

• Cai, Siyi; Zhu, Liang; Wang, Shuxiao; Wisthaler, Armin; Li, Qing; Jiang, Jingkun & Hao, Jiming (2019). Time-Resolved Intermediate-Volatility and Semivolatile Organic Compound Emissions from Household Coal Combustion in Northern China. Environmental Science and Technology.  ISSN 0013-936X.  53(15), s 9269- 9278 . doi: 10.1021/acs.est.9b00734
• 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 (2019). On the sources and sinks of atmospheric VOCs: an integratedanalysis of recent aircraft campaigns over North America. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  19(14), s 9097- 9123 . doi: 10.5194/acp-19-9097-2019 Fulltekst i vitenarkiv. Vis sammendrag

  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 budget and (ii) test the ability of current models to capture the distribution and reactivity of atmospheric VOCs over this region. Biogenic emissions dominate the North American VOC budget in the model, accounting for 70 % and 95 % of annually emitted VOC carbon and reactivity, respectively. Based on current inventories anthropogenic emissions have declined to the point where biogenic emissions are the dominant summertime source of VOC reactivity even in most major North American cities. Methane oxidation is a 2× larger source of nonmethane VOCs (via production of formaldehyde and methyl hydroperoxide) over North America in the model than are anthropogenic emissions. However, anthropogenic VOCs account for over half of the ambient VOC loading over the majority of the region owing to their longer aggregate lifetime. Fires can be a significant VOC source episodically but are small on average. In the planetary boundary layer (PBL), the model exhibits skill in capturing observed variability in total VOC abundance (R2=0.36) and reactivity (R2=0.54). The same is not true in the free troposphere (FT), where skill is low and there is a persistent low model bias (∼ 60 %), with most (27 of 34) model VOCs underestimated by more than a factor of 2. A comparison of PBL : FT concentration ratios over the southeastern US points to a misrepresentation of PBL ventilation as a contributor to these model FT biases. We also find that a relatively small number of VOCs (acetone, methanol, ethane, acetaldehyde, formaldehyde, isoprene + oxidation products, methyl hydroperoxide) drive a large fraction of total ambient VOC reactivity and associated model biases; research to improve understanding of their budgets is thus warranted. A source tracer analysis suggests a current overestimate of biogenic sources for hydroxyacetone, methyl ethyl ketone and glyoxal, an underestimate of biogenic formic acid sources, and an underestimate of peroxyacetic acid production across biogenic and anthropogenic precursors. Future work to improve model representations of vertical transport and to address the VOC biases discussed are needed to advance predictions of ozone and SOA formation.

• Coggon, Matthew M.; Lim, Christopher Y.; Koss, Abigail R.; Sekimoto, Kanako; Yuan, Bin; Gilman, Jessica B.; Hagan, David H.; Selimovic, Vanessa; Zarzana, Kyle J.; Brown, Steven S.; Roberts, James M.; Muller, Markus; Yokelson, Robert; Wisthaler, Armin; Krechmer, Jordan E.; Jimenez, Jose L.; Cappa, Christopher; Kroll, Jesse H.; De Gouw, Joost & Warneke, Carsten (2019). OH chemistry of non-methane organic gases (NMOGs) emittedfrom laboratory and ambient biomass burning smoke: evaluatingthe influence of furans and oxygenated aromatics on ozone andsecondary NMOG formation. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  19, s 14875- 14899 . doi: 10.5194/acp-19-14875-2019 Vis sammendrag

  Chamber oxidation experiments conducted at theFire Sciences Laboratory in 2016 are evaluated to identifyimportant chemical processes contributing to the hydroxyradical (OH) chemistry of biomass burning non-methaneorganic gases (NMOGs). Based on the decay of primarycarbon measured by proton transfer reaction time-of-flightmass spectrometry (PTR-ToF-MS), it is confirmed that fu-rans and oxygenated aromatics are among the NMOGs emit-ted from western United States fuel types with the highestreactivities towards OH. The oxidation processes and forma-tion of secondary NMOG masses measured by PTR-ToF-MSand iodide-clustering time-of-flight chemical ionization massspectrometry (I-CIMS) is interpreted using a box model em-ploying a modified version of the Master Chemical Mecha-nism (v. 3.3.1) that includes the OH oxidation of furan, 2-methylfuran, 2,5-dimethylfuran, furfural, 5-methylfurfural,and guaiacol. The model supports the assignment of ma-jor PTR-ToF-MS and I-CIMS signals to a series of anhy-drides and hydroxy furanones formed primarily through fu-ran chemistry. This mechanism is applied to a Lagrangianbox model used previously to model a real biomass burn-ing plume. The customized mechanism reproduces the de-cay of furans and oxygenated aromatics and the formationof secondary NMOGs, such as maleic anhydride. Based onmodel simulations conducted with and without furans, it isestimated that furans contributed up to 10 % of ozone andover 90 % of maleic anhydride formed within the first 4 h ofoxidation. It is shown that maleic anhydride is present in a biomass burning plume transported over several days, whichdemonstrates the utility of anhydrides as markers for agedbiomass burning plumes.

• Leglise, Joris; Muller, Markus; Piel, Felix; Otto, Tobias & Wisthaler, Armin (2019). Bulk Organic Aerosol Analysis by Proton-Transfer-Reaction Mass Spectrometry: An Improved Methodology for the Determination of Total Organic Mass, O:C and H:C Elemental Ratios, and the Average Molecular Formula. Analytical Chemistry.  ISSN 0003-2700.  91(20), s 12619- 12624 . doi: 10.1021/acs.analchem.9b02949
• Liao, Jin; Hanisco, Thomas F.; Wolfe, Glenn M.; Clair, Jason M. St.; Jimenez, José L.; Campuzano-Jost, Pedro; Nault, Benjamin A.; Fried, Alan; Marais, Eloise A.; Gonzalez Abad, Gonzalo; Chance, Kelly V.; Jethva, Hiren T; Ryerson, Thomas B.; Warneke, Carsten & Wisthaler, Armin (2019). Towards a satellite formaldehyde - In situ hybrid estimate for organic aerosol abundance. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  19(5), s 2765- 2785 . doi: 10.5194/acp-19-2765-2019 Fulltekst i vitenarkiv.
• Oak, Yujin J.; Park, Rokjin J; Schroeder, Jason R.; Crawford, James H.; Blake, Donald R.; Weinheimer, Andrew J.; Woo, Jung-Hun; Kim, Sang-Woo; Yeo, Huidong; Fried, Alan; Wisthaler, Armin & Brune, William H. (2019). Evaluation of simulated O3 production efficiency during the KORUS-AQ campaign: Implications for anthropogenic NOx emissions in Korea. Elementa: Science of the Anthropocene.  ISSN 2325-1026.  7 . doi: 10.1525/elementa.394 Fulltekst i vitenarkiv. Vis sammendrag

  We examine O3 production and its sensitivity to precursor gases and boundary layer mixing in Korea by using a 3-D global chemistry transport model and extensive observations during the KORea-US cooperative Air Quality field study in Korea, which occurred in May–June 2016. During the campaign, observed aromatic species onboard the NASA DC-8 aircraft, especially toluene, showed high mixing ratios of up to 10 ppbv, emphasizing the importance of aromatic chemistry in O3 production. To examine the role of VOCs and NOx in O3 chemistry, we first implement a detailed aromatic chemistry scheme in the model, which reduces the normalized mean bias of simulated O3 mixing ratios from –26% to –13%. Aromatic chemistry also increases the average net O3 production in Korea by 37%. Corrections of daytime PBL heights, which are overestimated in the model compared to lidar observations, increase the net O3 production rate by ~10%. In addition, increasing NOx emissions by 50% in the model shows best performance in reproducing O3 production characteristics, which implies that NOx emissions are underestimated in the current emissions inventory. Sensitivity tests show that a 30% decrease in anthropogenic NOx emissions in Korea increases the O3 production efficiency throughout the country, making rural regions ~2 times more efficient in producing O3 per NOx consumed. Simulated O3 levels overall decrease in the peninsula except for urban and other industrial areas, with the largest increase (~6 ppbv) in the Seoul Metropolitan Area (SMA). However, with simultaneous reductions in both NOx and VOCs emissions by 30%, O3 decreases in most of the country, including the SMA. This implies the importance of concurrent emission reductions for both NOx and VOCs in order to effectively reduce O3 levels in Korea.

• Piel, Felix; Muller, Markus; Mikoviny, Tomas; Pusede, Sally E. & Wisthaler, Armin (2019). Airborne measurements of particulate organic matter by proton-transfer-reaction mass spectrometry (PTR-MS): a pilot study. Atmospheric Measurement Techniques.  ISSN 1867-1381.  12(11), s 5947- 5958 . doi: 10.5194/amt-12-5947-2019 Fulltekst i vitenarkiv.
• Skulberg, Knut Ragnvald; Nyrud, Anders Q.; Goffeng, Lars Ole & Wisthaler, Armin (2019). Health and Exposure to VOCs From Pinewood in Indoor Environments. Frontiers in Built Environment.  ISSN 2297-3362.  5 . doi: 10.3389/fbuil.2019.00107 Fulltekst i vitenarkiv. Vis sammendrag

  As a natural, biological material, wood emits various organic chemical substances, mostly volatile organic compounds (VOCs), very volatile organic compounds (VVOCs) and formaldehyde. When such emissions occur in indoor spaces, concentrations of these substances are higher than concentrations outdoors. Consequently, the level of emissions from building materials are of relevance in relation to their possible health effects. The aim of the study was to test the hypothesis that exposure to VOCs from Scots pine (Pinus sylvestris) might increase mucous membrane symptoms and/or general symptoms, compared to exposure to VOCs from Norway spruce (Picea abies). The study was carried out as a double-blinded, crossover, randomized, controlled trial. The health indicators were measured using objective and subjective methods. The VOC exposure was measured with a proton-transfer-reaction time-of-flight mass spectrometer. Thirty healthy individuals participated. The mean concentration of CO2 inside the chamber in each session varied between 420 ppm and 533 ppm. The temperature and RH varied between 21.5°C and 23.7°C and 12.0% and 24.2%. Ozone was supplied via ventilated outdoor air. The median concentration in outdoor air was 23 μg/m3 (13 ppb). The study was conducted with a statistically significant difference in the exposure to VOCs between the experimental (pine) exposure and the control (spruce) exposure. The mean concentrations of VOCs during the experimental exposure were methanol (31 ppb), acetaldehyde (8 ppb), formic acid (11 ppb), acetone/propanal (14 ppb), acetic acid (14 ppb) and monoterpenes (172 ppb). No difference in health outcome was revealed between the experimental and the control exposure. No inflammatory reactions or sensory irritation were found with exposure to 172 ppb monoterpenes and a low ozone concentration. Low relative humidity may have increased eye blinking in the participants in both exposure situations.

• Sullivan, John T; McGee, Thomas J; Stauffer, Ryan M; Thompson, Anne M; Weinheimer, Andrew; Knote, Christoph; Janz, Scott; Wisthaler, Armin; Long, Russell; Szykman, James; Park, Jinsoo; Lee, Youngjae; Kim, Saewung; Jeong, Daun; Sanchez, Dianne; Twigg, Laurence; Sumnicht, Grant; Knepp, Travis & Schroeder, Jason R. (2019). Taehwa Research Forest: A receptor site for severe domestic pollution events in Korea during 2016. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  19(7), s 5051- 5067 . doi: 10.5194/acp-19-5051-2019 Fulltekst i vitenarkiv.
• Brune, William H.; Ren, Xinrong; Zhang, Li; Mao, Jingqiu; Miller, David O.; Anderson, Bruce E.; Blake, Donald R.; Cohen, Ronald A.; Diskin, Glenn S.; Hall, Samuel R.; Hanisco, Thomas F.; Huey, L. Gregory; Nault, Benjamin A.; Peischl, Jeff; Pollack, Ilana; Ryerson, Thomas B.; Shingler, Taylor; Sorooshian, Armin; Ullmann, Kirk; Wisthaler, Armin & Wooldridge, Paul J. (2018). Atmospheric oxidation in the presence of clouds during the Deep Convective Clouds and Chemistry (DC3) study. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  18(19), s 14493- 14510 . doi: 10.5194/acp-18-14493-2018
• Ervens, Barbara; Sorooshian, Armin; Aldhaif, Abdulmonam M; Shingler, Taylor; Crosbie, Ewan; Ziemba, Luke; Campuzano-Jost, Pedro; Jimenez, Jose L. & Wisthaler, Armin (2018). Is there an aerosol signature of chemical cloud processing?. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  18(21) . doi: 10.5194/acp-18-16099-2018
• Gkatzelis, Georgios I.; Tillmann, Ralf; Hohaus, Thorsten; Müller, Markus; Eichler, Philipp; Xu, Kang-Ming; Schlag, Patrick; Schmitt, Sebastian H.; Wegener, Robert; Kaminski, Martin; Holzinger, Rupert; Wisthaler, Armin & Kiendler-Scharr, Astrid (2018). Comparison of three aerosol chemical characterization techniques utilizing PTR-ToF-MS: A study on freshly formed and aged biogenic SOA. Atmospheric Measurement Techniques.  ISSN 1867-1381.  11(3), s 1481- 1500 . doi: 10.5194/amt-11-1481-2018
• Gkatzelis, Georgios I; Hohaus, Thorsten; Tillmann, Ralf; Gensch, Iulia; Müller, Markus; Eichler, Philipp; Xu, Kang-Ming; Schlag, Patrick H; Schmitt, Sebastian; Yu, Zhujun; Wegener, Robert; Kaminski, Martin; Holzinger, Rupert; Wisthaler, Armin & Kiendler-Scharr, Astrid (2018). Gas-to-particle partitioning of major biogenic oxidation products: A study on freshly formed and aged biogenic SOA. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  18(17), s 12969- 12989 . doi: 10.5194/acp-18-12969-2018
• Huang, Jianbei; Hartmann, Henrik; Hellén, Heidi; Wisthaler, Armin; Perreca, Erica; Weinhold, Alexander; Rücker, Alexander; van Dam, Nicole M.; Gershenzon, Jonathan; Trumbore, Susan & Behrendt, Thomas (2018). New perspectives on CO2, temperature, and light effects on BVOC emissions using online measurements by PTR-MS and cavity ring-down spectroscopy. Environmental Science and Technology.  ISSN 0013-936X.  52(23), s 13811- 13823 . doi: 10.1021/acs.est.8b01435
• Jensen, Niels Roland; Gruening, Carsten; Goded, Ignacio; Muller, Markus; Hjorth, Jens & Wisthaler, Armin (2018). Eddy-covariance flux measurements in an Italian deciduous forest using PTR-ToF-MS, PTR-QMS and FIS. International Journal of Environmental Analytical Chemistry.  ISSN 0306-7319.  98(8), s 758- 788 . doi: 10.1080/03067319.2018.1502758
• Kaiser, J.; Jacob, Daniel J.; Zhu, Lei; Travis, Katherine R.; Fisher, Jenny A.; Gonzalez Abad, Gonzalo; Zhang, Lin; Zhang, Xuesong; Fried, Alan; Crounse, John D.; Clair, Jason M. St. & Wisthaler, Armin (2018). High-resolution inversion of OMI formaldehyde columns to quantify isoprene emission on ecosystem-relevant scales: Application to the southeast US. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  18(8), s 5483- 5497 . doi: 10.5194/acp-18-5483-2018
• Kelly, James T.; Parworth, Caroline L.; Zhang, Qi; Miller, David J.; Sun, Kang; Zondlo, Mark A.; Baker, Kirk R.; Wisthaler, Armin; Nowak, John B.; Pusede, Sally E.; Cohen, Ronald C.; Weinheimer, Andrew J.; Beyersdorf, Andreas J.; Tonnesen, Gail S; Bash, Jesse O.; Valin, Luke C.; Crawford, James H.; Fried, Alan & Walega, James G. (2018). Modeling NH4NO3 Over the San Joaquin Valley During the 2013 DISCOVER‐AQ Campaign. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  123(9), s 4727- 4745 . doi: 10.1029/2018JD028290 Fulltekst i vitenarkiv.
• Lamb, Kara D.; Perring, Anne E.; Samset, Bjørn Hallvard; Peterson, Dave; Davis, Sean; Anderson, Bruce E.; Beyersdorf, Andreas; Blake, Donald R; Campuzano-Jost, Pedro; Corr, Chelsea A.; Diskin, Glenn S.; Kondo, Yutaka; Moteki, Nobuhiro; Nault, Benjamin A.; Oh, Jun; Park, Minsu; Pusede, Sally E.; Simpson, Isobel J.; Thornhill, Kenneth L.; Wisthaler, Armin & Schwarz, Joshua P. (2018). Estimating Source Region Influences on Black Carbon Abundance, Microphysics, and Radiative Effect Observed Over South Korea. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  123(23), s 13527- 13548 . doi: 10.1029/2018JD029257 Fulltekst i vitenarkiv.
• Sanchez, Kevin J.; Chen, Chia-Li; Russell, Lynn M.; Betha, Raghu; Liu, Jun; Price, Derek J.; Massoli, Paola; Ziemba, Luke D.; Crosbie, Ewan C.; Moore, Richard H.; Müller, Markus; Schiller, Sven A.; Wisthaler, Armin; Lee, Alex K.Y.; Quinn, Patricia K.; Bates, Timothy S.; Porter, Jack; Bell, Thomas G.; Saltzman, Eric S.; Vaillancourt, Robert D. & Behrenfeld, Mike J. (2018). Substantial seasonal contribution of observed biogenic sulfate particles to cloud condensation nuclei. Scientific Reports.  ISSN 2045-2322.  8:3235, s 1- 14 . doi: 10.1038/s41598-018-21590-9
• Schripp, Tobias; Anderson, Bruce; Crosbie, Ewan C.; Moore, Richard; Herrmann, Friederike; Oßwald, Patrick; Wahl, Claus; Kapernaum, Manfred; Kohler, Markus; Le Clercq, Patrick; Rauch, Bastian; Eichler, Philipp; Mikoviny, Tomas & Wisthaler, Armin (2018). Impact of Alternative Jet Fuels on Engine Exhaust Composition during the 2015 ECLIF Ground-Based Measurements Campaign. Environmental Science and Technology.  ISSN 0013-936X.  52(8), s 4969- 4978 . doi: 10.1021/acs.est.7b06244
• Tan, Wen; Zhu, Liang; Mikoviny, Tomas; Nielsen, Claus Jørgen; Wisthaler, Armin; Eichler, Philipp; Müller, Markus; D'Anna, Barbara; Farren, Naomi J.; Hamilton, Jacquiline F.; Pettersson, Jan B.C.; Hallquist, Mattias; Antonsen, Simen Gjelseth & Stenstrøm, Yngve H. (2018). Theoretical and experimental study on the reaction of tert-butylamine with OH radicals in the atmosphere. Journal of Physical Chemistry A.  ISSN 1089-5639.  122(18), s 4470- 4480 . doi: 10.1021/acs.jpca.8b01862
• Zhu, Liang; Mikoviny, Tomas; Kolstad Morken, Anne; Tan, Wen & Wisthaler, Armin (2018). A compact and easy-to-use mass spectrometer for online monitoring of amines in the flue gas of a post-combustion carbon capture plant. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  78, s 349- 353 . doi: 10.1016/j.ijggc.2018.09.003
• 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 (2017). Atmospheric Chemistry of tert-butylamine and AMP. Energy Procedia.  ISSN 1876-6102.  114, s 1026- 1032 . doi: 10.1016/j.egypro.2017.03.1248 Fulltekst i vitenarkiv.
• Baier, Bianca C; Brune, William H; Miller, David O; Blake, Donald; Long, Russell; Wisthaler, Armin; Cantrell, Christopher; Fried, Alan; Heikes, Brian; Brown, Steven; McDuffie, Erin; Flocke, Frank; Apel, Eric; Kaser, Lisa & Weinheimer, Andrew (2017). Higher measured than modeled ozone production at increased NOx levels in the Colorado Front Range. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  17(18), s 11273- 11292 . doi: 10.5194/acp-17-11273-2017 Fulltekst i vitenarkiv.
• Eichler, Philipp; Müller, Markus; Rohmann, Carolina; Stengel, Benjamin; Orasche, Jürgen; Zimmermann, Ralf & Wisthaler, Armin (2017). Lubricating oil as a major constituent of ship exhaust particles. Environmental Science and Technology Letters (ES&T Letters).  ISSN 2328-8930.  4(2), s 54- 58 . doi: 10.1021/acs.estlett.6b00488
• Huang, Min; Carmichael, Gregory R.; Crawford, James H.; Wisthaler, Armin; Zhan, Xiwu; Hain, Christopher R; Lee, Pius & Guenther, Alex B (2017). Biogenic isoprene emissions driven by regional weather predictions using different initialization methods: Case studies during the SEAC4RS and DiSCOVER-AQ airborne campaigns. Geoscientific Model Development.  ISSN 1991-959X.  10(8), s 3085- 3104 . doi: 10.5194/gmd-10-3085-2017 Fulltekst i vitenarkiv.
• Lakey, PSJ; Wisthaler, Armin; Berkemeier, T; Mikoviny, Tomas; Poschl, U & Shiraiwa, M. (2017). Chemical kinetics of multiphase reactions between ozone and human skin lipids: Implications for indoor air quality and health effects. Indoor Air: International Journal of Indoor Environment and Health.  ISSN 0905-6947.  27(4), s 816- 828 . doi: 10.1111/ina.12360
• 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. (2017). Airborne measurements of western U.S. wildfire emissions: Comparison with prescribed burning and air quality implications. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  122(11), s 6108- 6129 . doi: 10.1002/2016JD026315 Fulltekst i vitenarkiv.
• Mikoviny, Tomas; Nielsen, Claus Jørgen; Tan, Wen; Wisthaler, Armin; Zhu, Liang; Morken, Anne Kolstad & Nilsen, Terje Niøten (2017). Ambient Measurements of Amines by PTR-QiTOF: Instrument Performance Assessment and Results from Field Measurements in the Vicinity of TCM, Mongstad. Energy Procedia.  ISSN 1876-6102.  114, s 1017- 1021 . doi: 10.1016/j.egypro.2017.03.1246 Fulltekst i vitenarkiv.
• Morken, Anne Kolstad; Pedersen, Steinar; Kleppe, Eirik Romslo; Wisthaler, Armin; Vernstad, Kai; Ullestad, Øyvind; Flø, Nina Enaasen; Faramarzi, Leila & Hamborg, Espen Steinseth (2017). Degradation and emission results of amine plant operations from MEA testing at the CO2 technology centre Mongstad. Energy Procedia.  ISSN 1876-6102.  114, s 1245- 1262 . doi: 10.1016/j.egypro.2017.03.1379 Fulltekst i vitenarkiv.
• Muller, Markus; Eichler, Philipp; D'Anna, Barbara; Tan, Wen & Wisthaler, Armin (2017). Direct Sampling and Analysis of Atmospheric Particulate Organic Matter by Proton-Transfer-Reaction Mass Spectrometry. Analytical Chemistry.  ISSN 0003-2700.  89(20), s 10889- 10897 . doi: 10.1021/acs.analchem.7b02582
• 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 (2017). In situ measurements of water uptake by black carbon-containing aerosol in wildfire plumes. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  122(2), s 1086- 1097 . doi: 10.1002/2016JD025688 Fulltekst i vitenarkiv.
• Pfister, GG; Reddy, PJ; Barth, MC; Flocke, FF; Fried, A; Herndon, SC; Sive, Barkley C.; Sullivan, JT; Thompson, A.M; Yacovitch, TI; Weinheimer, A.J. & Wisthaler, Armin (2017). Using Observations and Source-Specific Model Tracers to Characterize Pollutant Transport During FRAPPE and DISCOVER-AQ. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  122(19), s 10510- 10538 . doi: 10.1002/2017JD027257 Fulltekst i vitenarkiv.
• 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 (2017). New insights into the column CH2O/NO2 ratio as an indicator of near-surface ozone sensitivity. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  122(16), s 8885- 8907 . doi: 10.1002/2017JD026781 Fulltekst i vitenarkiv.
• Zhu, Liang; Mikoviny, Tomas; Wisthaler, Armin & Nielsen, Claus Jørgen (2017). A Sampling Line Artifact in Stack Emission Measurement of Alkanolamine-enabled Carbon Capture Facility: Surface Reaction of Amines with Formaldehyde. Energy Procedia.  ISSN 1876-6102.  114, s 1022- 1025 . doi: 10.1016/j.egypro.2017.03.1247 Fulltekst i vitenarkiv.
• Bunkan, Arne Joakim Coldevin; Mikoviny, Tomas; Nielsen, Claus Jørgen; Wisthaler, Armin & Zhu, Liang (2016). Experimental and Theoretical Study of the OH-Initiated Photo-oxidation of Formamide. Journal of Physical Chemistry A.  ISSN 1089-5639.  120(8), s 1222- 1230 . doi: 10.1021/acs.jpca.6b00032
• Fisher, Jenny A.; Jacob, Daniel J.; Travis, Katherine R.; Kim, Patrick S.; Marais, Eloise A.; Miller, Christopher Chan; Yu, Karen; Zhu, Lei; Yantosca, Robert M.; Sulprizio, Melissa P.; Mao, Jingqiu; Wennberg, Paul O.; Crounse, John D.; Teng, Alex P.; Nguyen, Tran B.; St. Clair, Jason M.; Cohen, Ronald C.; Romer, Paul; Nault, Benjamin A.; Wooldridge, Paul J.; Jimenez, Jose L.; Campuzano-Jost, Pedro; Day, Douglas A.; Hu, Weiwei; Shepson, Paul B.; Xiong, Fulizi; Blake, Donald R.; Goldstein, Allen H.; Misztal, Pawel K.; Hanisco, Thomas F.; Wolfe, Glenn M.; Ryerson, Thomas B.; Wisthaler, Armin & Mikoviny, Tomas (2016). Organic nitrate chemistry and its implications for nitrogen budgets in an isoprene- and monoterpene-rich atmosphere: Constraints from aircraft (SEAC4RS) and ground-based (SOAS) observations in the Southeast US. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  16(9), s 5969- 5991 . doi: 10.5194/acp-16-5969-2016
• Fried, Alan R.; Barth, Mary C.; Bela, Megan M.; Weibring, Petter K.A.; Richter, Dirk A.; Walega, James G.; Li, Yunyao; Pickering, Kenneth E.; Apel, Eric C.; Hornbrook, Rebecca S.; Hills, Alan J.; Riemer, Daniel D.; Blake, Nicola J.; Blake, Donald Ray; Schroeder, Jason R.; Luo, Zhengzhaojohnny; Crawford, James H.; Olson, Jennifer Richardson; Rutledge, Steven A.; Betten, Daniel P.; Biggerstaff, Michael Irwin; Diskin, Glenn S.; Sachse, Glen W.; Campos, Teresa L.; Flocke, Frank M.; Weinheimer, Andrew J.; Cantrell, Christopher A.; Pollack, Ilana B.; Peischl, Jeff; Froyd, Karl D.; Wisthaler, Armin; Mikoviny, Tomas & Woods, Sarah (2016). Convective transport of formaldehyde to the upper troposphere and lower stratosphere and associated scavenging in thunderstorms over the central United States during the 2012 DC3 study. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(12), s 7430- 7460 . doi: 10.1002/2015JD024477
• Halliday, Hannah S; Thompson, Anne M.; Wisthaler, Armin; Blake, Donald R.; Hornbrook, Rebecca S.; Mikoviny, Tomas; Müller, Markus; Eichler, Philipp; Apel, Eric C. & Hills, Alan J. (2016). Atmospheric benzene observations from oil and gas production in the Denver-Julesburg Basin in July and August 2014. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(18), s 11,055- 11,074 . doi: 10.1002/2016JD025327
• Li, Yang; Barth, Mary C.; Chen, Gao; Patton, Edward G; Kim, Si-Wan; Wisthaler, Armin; Mikoviny, Tomas; Fried, Alan; Clark, Richard & Steiner, Allison L. (2016). Large-eddy simulation of biogenic VOC chemistry during the DISCOVER-AQ 2011 campaign. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(13), s 8083- 8105 . doi: 10.1002/2016JD024942
• Liu, Xiaoxi; Zhang, Yangmei; Huey, Lewis Gregory; Yokelson, Robert J.; Wang, Yuesi; Jiménez, José Luis; Campuzano-Jost, Pedro; Beyersdorf, Andreas J.; Blake, Donald Ray; Choi, Yunsoo; St Clair, Jason M.; Crounse, John D.; Day, Douglas A.; Diskin, Glenn S.; Fried, Alan R.; Hall, Samuel R.; Hanisco, Thomas F.; King, Laura E.; Meinardi, Simone; Mikoviny, Tomas; Palm, Brett B.; Peischl, Jeff; Perring, Anne E.; Pollack, Ilana B.; Ryerson, Thomas B.; Sachse, Glen W.; Schwarz, Joshua P.; Simpson, Isobel J.; Tanner, David J.; Thornhill, Kenneth Lee; Ullmann, Kirk; Weber, Rodney J.; Wennberg, Paul O.; Wisthaler, Armin; Wolfe, Glenn M. & Ziemba, Luke D. (2016). Agricultural fires in the southeastern U.S. during SEAC4RS: Emissions of trace gases and particles and evolution of ozone, reactive nitrogen, and organic aerosol. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  121(12), s 7383- 7414 . doi: 10.1002/2016JD025040
• Müller, Markus; Anderson, Bruce E; Beyersdorf, Andreas J.; Crawford, J.H; Diskin, Glenn S.; Eichler, Philipp; Fried, Alan; Keutsch, Frank N.; Mikoviny, Tomas; Thornhill, Kenneth L.; Walega, James G.; Weinheimer, Andrew J.; Yang, Melissa; Yokelson, Robert J. & Wisthaler, Armin (2016). In situ measurements and modeling of reactive trace gases in a small biomass burning plume. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  16(6), s 3813- 3824 . doi: 10.5194/acp-16-3813-2016
• Pollack, Ilana B.; Homeyer, Cameron R.; Ryerson, Thomas B.; Aikin, Kenneth C.; Peischl, Jeff; Apel, Eric C.; Campos, Teresa L.; Flocke, Frank M.; Hornbrook, Rebecca S.; Knapp, David J.; Montzka, Denise D.; Weinheimer, Andrew J.; Riemer, Daniel D.; Diskin, Glenn S.; Sachse, Glen W.; Mikoviny, Tomas; Wisthaler, Armin; Bruning, Eric C.; Macgorman, Donald R.; Cummings, Kristin A.; Pickering, Kenneth E.; Huntrieser, Heidi; Lichtenstern, Michael; Schlager, Hans & Barth, Mary C. (2016). Airborne quantification of upper tropospheric NOx production from lightning in deep convective storms over the United States Great Plains. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  121(4), s 2002- 2028 . doi: 10.1002/2015JD023941
• Pope, Richard J; Richards, Nigel AD; Chipperfield, Martyn P.; Moore, David P; Monks, Sarah A.; Arnold, Stephen R; Glatthor, Norbert; Kiefer, Michael; Breider, Tom J; Harrison, Jeremy J.; Remedios, John J; Warneke, Carsten; Roberts, James M.; Diskin, Glenn S.; Huey, Lewis G; Wisthaler, Armin; Apel, Eric C.; Bernath, Peter F. & Feng, Wuhu (2016). Intercomparison and evaluation of satellite peroxyacetyl nitrate observations in the upper troposphere-lower stratosphere. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  16(21), s 13541- 13559 . doi: 10.5194/acp-16-13541-2016
• Schroeder, Jason R.; Crawford, James H.; Fried, Alan; Walega, James; Weinheimer, Andrew; Wisthaler, Armin; Müller, Markus; Mikoviny, Tomas; Chen, Gao; Shook, Michael; Blake, Donald R.; Diskin, Glenn; Estes, Mark; Thompson, Anne M; Lefer, Barry L; Long, Russell & Mattson, Eric (2016). Formaldehyde column density measurements as a suitable pathway to estimate near-surface ozone tendencies from space. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(21), s 13,088- 13,112 . doi: 10.1002/2016JD025419
• Shingler, Taylor; Crosbie, Ewan; Ortega, Amber; Shiraiwa, M.; Zuend, Andreas; Beyersdorf, Andreas; Ziemba, L.; Anderson, Bruce; Thornhill, Lee; Perring, Anne E.; Schwarz, Joshua P.; Campazano-Jost, Pedro; Day, Douglas A.; Jimenez, Jose L.; Hair, Johnathan W.; Mikoviny, Tomas; Wisthaler, Armin & Sorooshian, Armin (2016). Airborne characterization of subsaturated aerosol hygroscopicity and dry refractive index from the surface to 6.5 km during the SEAC4RS campaign. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(8), s 4188- 4210 . doi: 10.1002/2015JD024498
• Shingler, Taylor; Sorooshian, Armin; Ortega, Amber; Crosbie, Ewan; Wonaschutz, Anna; Perring, Anne E.; Beyersdorf, Andreas; Ziemba, Luke; Jimenez, Jose L.; Campuzano-Jost, Pedro; Mikoviny, Tomas; Wisthaler, Armin & Russell, Lynn M. (2016). Ambient observations of hygroscopic growth factor and f(RH) below 1: Case studies from surface and airborne measurements. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(22), s 661- 677 . doi: 10.1002/2016JD025471
• Yates, Emma L.; Iraci, Laura T.; Singh, Hanwant B.; Tanaka, Tomoaki; Roby, Matthew C.; Hamill, Patrick J.; Clements, Craig B.; Lareau, Neil P.; Contezac, Jonathan; Blake, Dustin R.; Simpson, Isobel J.; Wisthaler, Armin; Mikoviny, Tomas; Diskin, Glenn S.; Beyersdorf, Andreas J.; Choi, Yonghoon; Ryerson, Thomas B.; Jimenez, Jose L.; Campuzano-Jost, Pedro; Loewenstein, Max & Gore, Warren J.Y. (2016). Airborne measurements and emission estimates of greenhouse gases and other trace constituents from the 2013 California Yosemite Rim wildfire. Atmospheric Environment.  ISSN 1352-2310.  127, s 293- 302 . doi: 10.1016/j.atmosenv.2015.12.038
• Yu, Karen; Jacob, Daniel J.; Fisher, Jenny A.; Kim, Patrick S.; Marais, Eloise A.; Miller, Christopher C.; Travis, Katherine R.; Zhu, Lei; Yantosca, Robert M.; Sulprizio, Melissa P.; Cohen, Ron C.; Dibb, Jack E.; Fried, Alan; Mikoviny, Tomas; Ryerson, Thomas B.; Wennberg, Paul O. & Wisthaler, Armin (2016). Sensitivity to grid resolution in the ability of a chemical transport model to simulate observed oxidant chemistry under high-isoprene conditions. Atmospheric Chemistry and Physics (ACP).  ISSN 1680-7367.  2016, s 1- 10 . doi: 10.5194/acp-2015-980
• Yu, Karen; Jacob, Daniel J.; Fisher, Jenny A.; Kim, Patrick S.; Marais, Eloise A.; Miller, Christopher C.; Travis, Katherine R.; Zhu, Lei; Yantosca, Robert M.; Sulprizio, Melissa P.; Cohen, Ron C.; Dibb, Jack E.; Fried, Alan; Mikoviny, Tomas; Ryerson, Thomas B.; Wennberg, Paul O. & Wisthaler, Armin (2016). Sensitivity to grid resolution in the ability of a chemical transport model to simulate observed oxidant chemistry under high-isoprene conditions. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  16(7), s 4369- 4378 . doi: 10.5194/acp-16-4369-2016
• Zamora, L.M.; Kahn, Ralph A.; Cubison, Michael J.; Diskin, Glenn S.; Jimenez, J. L.; Kondo, Y.; McFarquhar, G.M.; Nenes, A.; Thornhill, Kenneth L.; Wisthaler, Armin; Zelenyuk, A. & Ziemba, Luke D. (2016). Aircraft-measured indirect cloud effects from biomass burning smoke in the Arctic and subarctic. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  16(2), s 715- 738 . doi: 10.5194/acp-16-715-2016
• Zhang, Yuzhong; Wang, Yuhang; Chen, Gao; Smeltzer, Charles; Crawford, James; Olson, Jennifer; Szykman, James; Weinheimer, Andrew J.; Knapp, David J.; Montzka, Denise D.; Wisthaler, Armin; Mikoviny, Tomas; Fried, Alan & Diskin, Glenn (2016). Large vertical gradient of reactive nitrogen oxides in the boundary layer: Modeling analysis of DISCOVER-AQ 2011 observations. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(4), s 1922- 1934 . doi: 10.1002/2015JD024203
• Ziemba, Luke D.; Beyersdorf, Andreas J.; Chen, Gao; Corr, Chelsea A.; Crumeyrolle, Suzanne N.; Diskin, Glenn; Hudgins, Charlie; Martin, Robert; Mikoviny, Tomas; Moore, Richard; Shook, Michael; Thornhill, K. Lee; Winstead, Edward L.; Wisthaler, Armin & Anderson, Bruce E (2016). Airborne observations of bioaerosol over the Southeast United States using a Wideband Integrated Bioaerosol Sensor. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  121(14), s 8506- 8524 . doi: 10.1002/2015JD024669
• Apel, EC; Hornbrook, RS; Hills, AJ; Blake, NJ; Barth, MC; Weinheimer, A; Cantrell, C; Rutledge, SA; Basarab, B; Crawford, J; Diskin, G; Homeyer, CR; Campos, T; Flocke, F; Fried, A; Blake, DR; Brune, W; Pollack, I; Peischl, J; Ryerson, T; Wennberg, PO; Crounse, JD; Wisthaler, Armin; Mikoviny, Tomas; Huey, G; Heikes, B; O'Sullivan, D & Riemer, DD (2015). Upper tropospheric ozone production from lightning NOx-impacted convection: Smoke ingestion case study from the DC3 campaign. Journal of Geophysical Research (JGR): Atmospheres.  ISSN 2169-897X.  120, s 2505- 2523 . doi: 10.1002/2014JD022121
• Bunkan, Arne Joakim Coldevin; Hetzler, Jens; Mikoviny, Tomas; Wisthaler, Armin; Nielsen, Claus Jørgen & Olzmann, Matthias (2015). The reactions of N-methylformamide and N,N-dimethylformamide with OH and their photo-oxidation under atmospheric conditions: experimental and theoretical studies. Physical Chemistry, Chemical Physics - PCCP.  ISSN 1463-9076.  17(10), s 7046- 7059 . doi: 10.1039/C4CP05805D Fulltekst i vitenarkiv.
• Eichler, P.; Müller, M; D'Anna, Barbara & Wisthaler, Armin (2015). A novel inlet system for online chemical analysis of semi-volatile submicron particulate matter. Atmospheric Measurement Techniques.  ISSN 1867-1381.  8(3), s 1353- 1360 . doi: 10.5194/amt-8-1353-2015
• Emmons, Louisa K.; Arnold, Steve R.; Monks, Sarah A.; Huijnen, Vincent; Tilmes, Simone; Law, Katherine S.; Thomas, Jennie L.; Raut, Jean-Christophe; Bouarar, Idir; Turquety, Solène; Long, Yoann; Duncan, Bryan N.; Steenrod, Stephen D.; Strode, Sarah; Flemming, Johannes; Mao, Jingqiu; Langner, Joakim; Thompson, Anne Mee; Tarasick, David; Apel, Eric C.; Blake, Donald Ray; Cohen, Ronald C.; Dibb, Jack; Diskin, Glenn S.; Fried, Alan; Hall, Samuel R.; Huey, Lewis Gregory; Weinheimer, Andrew J.; Wisthaler, Armin; Mikoviny, Tomas; Nowak, John B.; Peischl, Jeff; Roberts, James M.; Ryerson, Thomas B.; Warneke, Carsten & Helmig, Detlev (2015). The POLARCAT Model Intercomparison Project (POLMIP): Overview and evaluation with observations. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  15(12), s 6721- 6744 . doi: 10.5194/acp-15-6721-2015
• Hu, Lu; Millet, Dylan B.; Baasandorj, Munkhbayar; Griffis, Timothy J.; Travis, Katherine R.; Tessum, Christopher W.; Marshall, Julian D.; Reinhart, Wesley F.; Mikoviny, Tomas; Müller, Markus; Wisthaler, Armin; Graus, Martin; Warneke, Carsten & De Gouw, Joost (2015). Emissions of C6–C8 aromatic compounds in the United States: Constraints from tall tower and aircraft measurements. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  120(2), s 826- 842 . doi: 10.1002/2014JD022627
• Hu, Weiwei; Campuzano-Jost, Pedro; Palm, Brett B.; Day, Douglas A.; Ortega, Amber M.; Hayes, Patrick L.; Krechmer, Jordan E.; Chen, Qi; Kuwata, Mikinori; Liu, Yingjun; De Sá, Suzane Simoes; McKinney, Karena A.; Martin, Scot T.; Hu, Min; Budisulistiorini, Sri Hapsari; Riva, Matthieu; Surratt, Jason D.; St Clair, Jason M.; Isaacman-Van Wertz, Gabriel; Yee, Lindsay D.; Goldstein, Allen H.; Carbone, Samara; Brito, Joel F.; Artaxo, Paulo; de Gouw, Joost A.; Koss, Abigail R.; Wisthaler, Armin; Mikoviny, Tomas; Karl, Thomas; Kaser, Lisa; Jud, Werner; Hansel, Amie K.; Docherty, Kenneth S.; Alexander, Michael Lizabeth; Robinson, Niall H.; Coe, Hugh; Allan, James Donald; Canagaratna, Manjula R.; Paulot, Fabien & Jiménez, José Luis (2015). Characterization of a real-time tracer for isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) from aerosol mass spectrometer measurements. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  15(20), s 11807- 11833 . doi: 10.5194/acp-15-11807-2015
• Liao, Jin; Froyd, Karl D.; Murphy, Daniel M.; Keutsch, Frank N.; Yu, Ge; Wennberg, Paul O.; St. Clair, Jason M.; Crounse, John D.; Wisthaler, Armin; Mikoviny, Tomas; Jimenez, Jose L.; Campuzano-Jost, Pedro; Day, Douglas A.; Hu, Weiwei; Ryerson, Thomas B.; Pollack, Ilana B.; Peischl, Jeff; Anderson, Bruce E; Ziemba, Luke D.; Blake, Donald R.; Meinardi, Simone & Diskin, Glenn (2015). Airborne measurements of organosulfates over the continental U.S.. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  120(7), s 2990- 3005 . doi: 10.1002/2014JD022378
• Nozière, Barbara; Kalberer, Markus; Claeys, Magda; Allan, James; D'Anna, Barbara; Decesari, Stefano; Finessi, Emanuela; Glasius, Marianne; Grgić, Irena; Hamilton, Jacqueline F.; Hoffmann, Thorsten; Iinuma, Yoshiteru; Jaoui, Mohammed; Kahnt, Ariane; Kampf, Christopher J.; Kourtchev, Ivan; Maenhaut, Willy; Marsden, Nicholas; Saarikoski, Sanna; Schnelle-Kreis, Jürgen; Surratt, Jason D.; Szidat, Sönke; Szmigielski, Rafal & Wisthaler, Armin (2015). The molecular identification of organic compounds in the atmosphere: state of the art and challenges. Chemical Reviews.  ISSN 0009-2665.  115(10), s 3919- 3983 . doi: 10.1021/cr5003485
• Sun, Kang; Cady-Pereira, Karen; Miller, David J.; Tao, Lei; Zondlo, Mark A.; Nowak, John B.; Neuman, Jonathan Andrew; Mikoviny, Tomas; Müller, Markus; Wisthaler, Armin; Scarino, Amy J. & Hostetler, Chris A. (2015). Validation of TES ammonia observations at the single pixel scale in the San Joaquin Valley during DISCOVER-AQ. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  120(10), s 5140- 5154 . doi: 10.1002/2014JD022846
• Wolfe, Glenn M.; Hanisco, Thomas F.; Arkinson, Heather L.; Bui, Thaopaul; Crounse, John D.; Dean-Day, Jonathan M.; Goldstein, Allen H.; Guenther, Alex; Hall, Samuel R.; Huey, Greg L.; Jacob, Daniel J.; Karl, Thomas; Kim, Patrick S.; Liu, Xiaoxi; Marvin, Margaret R.; Mikoviny, Tomas; Misztal, Pawel K.; Nguyen, Trân B.H.; Peischl, Jeff; Pollack, Ilana B.; Ryerson, Thomas B.; St Clair, Jason M.; Teng, Alexander P.; Travis, Katherine R.; Ullmann, Kirk; Wennberg, Paul O. & Wisthaler, Armin (2015). Quantifying sources and sinks of reactive gases in the lower atmosphere using airborne flux observations. Geophysical Research Letters.  ISSN 0094-8276.  42(19), s 8231- 8240 . doi: 10.1002/2015GL065839
• Anderson, Daniel C.; Loughner, Christopher P.; Diskin, Glenn S.; Weinheimer, Andrew; Canty, Timothy P.; Salawitch, Ross J.; Worden, HM; Fried, Alan; Mikoviny, Tomas; Wisthaler, Armin & Dickerson, Russell R. (2014). Measured and modeled CO and NOy in DISCOVER-AQ: An evaluation of emissions and chemistry over the eastern US. Atmospheric Environment.  ISSN 1352-2310.  96, s 78- 87 . doi: 10.1016/j.atmosenv.2014.07.004
• Grøntoft, Terje; Schmidbauer, Josef Norbert; Wisthaler, Armin; Mikoviny, T.; Eichler, Philipp; Müller, Markus; Hackney, Stephen & Larsen, Anne Sommer (2014). VOC emissions from canvas and acetic acid deposition to canvas and glass. e-Preservation Science.  ISSN 1854-3928.  11, s 22- 28
• Maguta, Mihayo Musabila; Aursnes, Marius; Bunkan, Arne Joakim Coldevin; Edelen, Katie; Mikoviny, Tomas; Nielsen, Claus Jørgen; Stenstrøm, Yngve; Tang, Yizhen & Wisthaler, Armin (2014). Atmospheric fate of nitramines: An experimental and theoretical study of the OH reactions with CH<sub>3</sub>NHNO<sub>2</sub> and (CH<sub>3</sub>) <sub>2</sub>NNO<sub>2</sub>. Journal of Physical Chemistry A.  ISSN 1089-5639.  118(19), s 3450- 3462 . doi: 10.1021/jp500305w
• Morken, Anne K.; Nenseter, Bjarne; Pedersen, Steinar; Chhaganlal, Milan; Feste, Jane K.; Tyborgnes, Rita Bøe; Ullestad, Øyvind; Ulvatn, Helge; Zhu, Liang; Mikoviny, Tomas; Wisthaler, Armin; Cents, Toine; Bade, Otto M.; Knudsen, Jacob; de Koeijer, Gelein; Falk-Pedersen, Olav & Hamborg, Espen S. (2014). Emission results of amine plant operations from MEA testing at the CO<sub>2</sub> Technology Centre Mongstad. Energy Procedia.  ISSN 1876-6102.  63, s 6023- 6038 . doi: 10.1016/j.egypro.2014.11.636
• Müller, M; Mikoviny, Tomas; Feil, S; Haidacher, S.; Hanel, G.; Hartungen, E.; Jordan, A.; Märk, L.; Mutschlechner, P.; Schottkowsky, R.; Sulzer, P.; Crawford, J.H & Wisthaler, Armin (2014). A compact PTR-ToF-MS instrument for airborne measurements of volatile organic compounds at high spatiotemporal resolution. Atmospheric Measurement Techniques.  ISSN 1867-1381.  7(11), s 3763- 3772 . doi: 10.5194/amt-7-3763-2014
• Müller, Markus; Mikoviny, Tomas & Wisthaler, Armin (2014). Detector aging induced mass discrimination and non-linearity effects in PTR-ToF-MS. International Journal of Mass Spectrometry.  ISSN 1387-3806.  365-366, s 93- 97 . doi: 10.1016/j.ijms.2013.12.008
• Rivera-Rios, JC; Nguyen, T.B.; Crounse, J. D.; Jud, W.; St Clair, J. M.; Mikoviny, Tomas; Gilman, J. B.; Lerner, B. M.; Kaiser, J. B.; de Gouw, J.; Wisthaler, Armin; Hansel, A; Wennberg, P. O.; Seinfeld, J. H. & Keutsch, F. N. (2014). Conversion of hydroperoxides to carbonyls in field and laboratory instrumentation: Observational bias in diagnosing pristine versus anthropogenically controlled atmospheric chemistry. Geophysical Research Letters.  ISSN 0094-8276.  41(23), s 8645- 8651 . doi: 10.1002/2014GL061919
• Mikoviny, T.; Eichler, P.; Müller, M.; Grøntoft, Terje; Warner, Nicholas Alexander & Wisthaler, Armin (2013). Volatile organic compounds in the museum environment - a PTR-TOF pilot study on canvas samples, In A Hansel & J. Dunkel (ed.),  6th International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications. Contributions.  Innsbruck University Press.  ISBN 978-3902811912.  Contributed papers (posters).  s 161 - 161
• Müller, Markus; Jud, Werner; Mikoviny, Tomas; D'Anna, Barbara & Wisthaler, Armin (2013). A new software tool for the analysis of high resolution PTR-TOF mass spectra, In A Hansel & J. Dunkel (ed.),  6th International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications. Contributions.  Innsbruck University Press.  ISBN 978-3902811912.  Contributed papers (posters).  s 179 - 181
• Müller, Markus; Mikoviny, T.; Jud, Werner; D'Anna, Barbara & Wisthaler, Armin (2013). A new software tool for the analysis of high resolution PTR-TOF mass spectra. Chemometrics and Intelligent Laboratory Systems.  ISSN 0169-7439.  127, s 158- 165 . doi: 10.1016/j.chemolab.2013.06.011
• Wisthaler, Armin; Crawford, J.H; Haidahcer, S.; Hanel, G.; Hartungen, E.; Jordan, A.; Märk, L.; Mikoviny, T.; Müller, M.; Mutschlechner, P.; Schottkowsky, R. & Sulzer, P. (2013). Development of a compact PTR-ToF-MS for suborbital research on the earth's atmospheric composition, In A Hansel & J. Dunkel (ed.),  6th International Conference on Proton Transfer Reaction Mass Spectrometry and its Applications. Contributions.  Innsbruck University Press.  ISBN 978-3902811912.  Instruments & technology and future trends.  s 96 - 96
• Karl, Matthias; Dye, Christian Jarle; Schmidbauer, Josef Norbert; Wisthaler, Armin; Mikoviny, T.; D'Anna, B.; Müller, M; Borrás, E.; Clemente, E.; Muñoz, A.; Porras, R.; Ródenas, M.; Vázquez, M. & Brauers, T. (2012). Study of OH-initiated degradation of 2-aminoethanol. Atmospheric Chemistry and Physics.  ISSN 1680-7316.  12(4), s 1881- 1901 . doi: 10.5194/acp-12-1881-2012 Fulltekst i vitenarkiv. Vis sammendrag

  The degradation of 2-aminoethanol (MEA) by the hydroxyl radical (OH) was studied in the European Photoreactor (EUPHORE), a large outdoor environmental chamber. High-Temperature Proton-Transfer-Reaction Mass Spectrometry (HT-PTR-MS) and Fast Fourier Transform Infrared (FT-IR) were used to follow concentrations of reactants in the gas phase. Aerosol mass concentrations were tracked with Aerosol Mass Spectrometry (AMS). The chamber aerosol model MAFOR was applied to quantify losses of MEA to the particle phase. The rate constant k(OH + MEA) was determined relative to the rate constant of the 1,3,5-trimethylbenzene reaction with OH and was found to be (9.2 ± 1.1) × 10−11 cm3 molecule−1 s−1, and thus the reaction between OH radicals and MEA proceeds a factor of 2–3 faster than estimated by structure-activity relationship (SAR) methods. Main uncertainty of the relative rate determination is the unknown temporal behaviour of the loss rate of MEA to chamber wall surfaces during the sunlit experiments. Nucleation and growth of particles observed in the experiments could be reproduced by the chamber model that accounted for condensation of gaseous oxidation products, condensation of ethanolaminium nitrate and nucleation involving MEA and nitric acid.

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• Hak, Claudia; Vogt, Matthias; Dauge, Franck Rene; Fjellheim, Øystein; Holøs, Sverre Bjørn; Yang, Aileen; Mikoviny, Tomas & Wisthaler, Armin (2019). P-4 Formation of ultrafine particles in a classroom under different ventilation conditions.
• Wisthaler, Armin & Müller, Markus (2019). New Instruments for Direct Sampling and Real-Time Analysis of Particulate Organic Matter in Air.
• Wisthaler, Armin; Eichler, Philipp & Müller, Markus (2018). Direct Sampling and Analysis of Airborne Particulate Organic Matter by Proton-Transfer-Reaction Mass Spectrometry.
• Reijrink, Nina Gwendolyn; Nielsen, Claus Jørgen & Wisthaler, Armin (2017). Theoretical and experimental studies of intermediates in the atmospheric degradation of imines: Degradation of methyl methanimine and N-methyl ethanimine by OH radicals.
• Langebner, Stephan; Mikoviny, Tomas; Müller, Markus & Wisthaler, Armin (2014). VOC measurements by PTR-ToF-MS at the Birkenes Observatory. A data summary report.. NILU OR (NILU Oppdragsrapport). 1/2014. Fulltekst i vitenarkiv. Vis sammendrag

  A high resolution proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF- MS) was used for on-line and real-time measurements of volatile organic compounds (VOCs) at the Birkenes Observatory in Southern Norway. Measurements were carried out during late spring and summer 2012 and in January and early February 2013. Here we present the obtained PTRMS standard data product which includes volume mixing ratios of methanol, acetonitrile, acetaldehyde, acetone, dimethyl sulphide, isoprene, methacrolein plus methylvinylketone, methylethylketone, benzene, toluene, C8-alkylbenzenes, C9-alkylbenzenes and the sum of the monoterpene isomers. Exploratory data of formic acid, acetic acid, pinonaldehyde and three unidentified signals (m/z 87.080, m/z 89.060 and m/z 101.098) are also shown. PTR-ToF-MS mass spectra were dominated by oxygenated VOCs both in summer and in winter. Pure hydrocarbons were mostly aromatic hydrocarbons (benzene, toluene, C8-alkylbenzenes) in winter and biogenic hydrocarbons (monoterpenes and isoprene) in summer. The summertime data confirm that the Birkenes Observatory is an interesting site in the boreo-nemoral vegetation zone where it is possible to observe both monoterpene and isoprene emissions and their photochemical processing in the atmosphere.

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