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    Academic Journals

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• Measurement report: Introduction to the HyICE-2018 campaign for measurements of ice-nucleating particles and instrument inter-comparison in the Hyytiälä boreal forest.

  Authors:Zoé Brasseur, Dimitri Castarède, Erik S. Thomson, Michael P. Adams, Saskia Drossaart van Dusseldorp, Paavo Heikkilä, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 8) Peer-Reviewed

  Apr. 19, 2022336 words Brief article The formation of ice particles in Earth's atmosphere strongly influences the dynamics and optical properties of clouds and their impacts on the climate system. Ice formation in clouds is often triggered heterogeneously...

• New investigations on homogeneous ice nucleation: the effects of water activity and water saturation formulations.

  Authors:Manuel Baumgartner, Christian Rolf, Jens-Uwe Grooß, Julia Schneider, Tobias Schorr, Ottmar Möhler, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 1) Peer-Reviewed

  Jan. 3, 2022335 words Brief article Laboratory measurements at the AIDA cloud chamber and airborne in situ observations suggest that the homogeneous freezing thresholds at low temperatures are possibly higher than expected from the so-called "Koop line"....

• Chemical composition of nanoparticles from α-pinene nucleation and the influence of isoprene and relative humidity at low temperature.

  Authors:Lucía Caudillo, Birte Rörup, Martin Heinritzi, Guillaume Marie, Mario Simon, Andrea C. Wagner, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 22) Peer-Reviewed

  Nov. 25, 2021355 words Brief article Biogenic organic precursors play an important role in atmospheric new particle formation (NPF). One of the major precursor species is α-pinene, which upon oxidation can form a suite of products covering a wide range of...

• Sources and nature of ice-nucleating particles in the free troposphere at Jungfraujoch in winter 2017.

  Authors:Larissa Lacher, Hans-Christian Clemen, Xiaoli Shen, Stephan Mertes, Martin Gysel-Beer, Alireza Moallemi, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 22) Peer-Reviewed

  Nov. 23, 2021468 words Article Primary ice formation in mixed-phase clouds is initiated by a minute subset of the ambient aerosol population, called ice-nucleating particles (INPs). The knowledge about their atmospheric concentration, composition, and...

• Two-year statistics of columnar-ice production in stratiform clouds over Hyytiälä, Finland: environmental conditions and the relevance to secondary ice production.

  Authors:Haoran Li, Ottmar Möhler, Tuukka Petäjä, and Dmitri MoisseevFrom:Atmospheric Chemistry and Physics (Vol. 21, Issue 19) Peer-Reviewed

  Oct. 5, 2021425 words Article Formation of ice particles in clouds at temperatures of -10 .sup." C or warmer was documented by using ground-based radar observations. At these temperatures, the number concentration of ice-nucleating particles (INPs)...

• High homogeneous freezing onsets of sulfuric acid aerosol at cirrus temperatures.

  Authors:Julia Schneider, Kristina Höhler, Robert Wagner, Harald Saathoff, Martin Schnaiter, Tobias Schorr, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 18) Peer-Reviewed

  Sept. 28, 2021484 words Article Homogeneous freezing of aqueous solution aerosol particles is an important process for cloud ice formation in the upper troposphere. There the air temperature is low, the ice supersaturation can be high and the...

• Laboratory and field studies of ice-nucleating particles from open-lot livestock facilities in Texas.

  Authors:Naruki Hiranuma, Brent W. Auvermann, Franco Belosi, Jack Bush, Kimberly M. Cory, Dimitrios G. Georgakopoulos, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 18) Peer-Reviewed

  Sept. 24, 2021464 words Article In this work, an abundance of ice-nucleating particles (INPs) from livestock facilities was studied through laboratory measurements from cloud-simulation chamber experiments and field investigation in the Texas...

• Heterogeneous ice nucleation ability of aerosol particles generated from Arctic sea surface microlayer and surface seawater samples at cirrus temperatures.

  Authors:Robert Wagner, Luisa Ickes, Allan K. Bertram, Nora Els, Elena Gorokhova, Ottmar Möhler, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 18) Peer-Reviewed

  Sept. 21, 2021426 words Article Sea spray aerosol particles are a recognised type of ice-nucleating particles under mixed-phase cloud conditions. Entities that are responsible for the heterogeneous ice nucleation ability include intact or fragmented...

• Infrared optical constants of highly diluted sulfuric acid solution droplets at cirrus temperatures

  Authors:Robert Wagner, Stefan Benz, Helmut Bunz, Ottmar Mohler, Harald Saathoff, Martin Schnaiter, et al.From:Journal of Physical Chemistry A (Vol. 112, Issue 46) Peer-Reviewed

  Nov. 20, 2008 Report

   Citation Only

• A new ice nucleation active site parameterization for desert dust and soot

  Authors:Romy Ullrich, Corinna Hoose, Ottmar Mohler, Monika Niemand, Robert Wagner, Kristina Hohler, et al.From:Journal of the Atmospheric Sciences (Vol. 74, Issue 3) Peer-Reviewed

  Mar. 2017 Author abstract, Rep...

   Citation Only

• Influence of particle aspect ratio on the midinfrared extinction spectra of wavelength-sized ice crystals

  Authors:Robert Wagner, Stefan Benz, Ottmar Mohler, Harald Saathoff, Martin Schnaiter, and Thomas LeisnerFrom:Journal of Physical Chemistry A (Vol. 111, Issue 50) Peer-Reviewed

  Dec. 20, 200768 words Article

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• A new method for operating a continuous-flow diffusion chamber to investigate immersion freezing: assessment and performance study.

  Authors:Gourihar Kulkarni, Naruki Hiranuma, Ottmar Möhler, Kristina Höhler, Swarup China, Daniel J. Cziczo, et al.From:Atmospheric Measurement Techniques (Vol. 13, Issue 12) Peer-Reviewed

  Dec. 9, 2020326 words Report, Brief articl... Glaciation in mixed-phase clouds predominantly occurs through the immersion-freezing mode where ice-nucleating particles (INPs) immersed within supercooled droplets induce the nucleation of ice. Model representations of...

• High-resolution optical constants of crystalline ammonium nitrate for infrared remote sensing of the Asian Tropopause Aerosol Layer.

  Authors:Robert Wagner, Baptiste Testa, Michael Höpfner, Alexei Kiselev, Ottmar Möhler, Harald Saathoff, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 3) Peer-Reviewed

  Mar. 11, 2021224 words Brief article Infrared spectroscopic observations have shown that crystalline ammonium nitrate (AN) particles are an abundant constituent of the upper tropospheric aerosol layer which is formed during the Asian summer monsoon period,...

• A comprehensive characterization of ice nucleation by three different types of cellulose particles immersed in water

  Authors:Naruki Hiranuma, Kouji Adachi, David M. Bell, Franco Belosi, Hassan Beydoun, Bhaskar Bhaduri, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 7) Peer-Reviewed

  Apr. 10, 201934 words Author abstract, Bri... Byline: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link:...

• A particle-surface-area-based parameterization of immersion freezing on desert dust particles

  Authors:Monika Niemand, Ottmar Mohler, Bernhard Vogel, Heike Vogel, Corinna Hoose, Paul Connolly, et al.From:Journal of the Atmospheric Sciences (Vol. 69, Issue 10) Peer-Reviewed

  Oct. 2012 Author abstract, Rep...

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• Infrared spectrum of nitric acid dihydrate: Influence of particle shape

  Authors:Robert Wagner, Ottmar Mohler, Harald Saathoff, Olaf Stetzer, and Ulrich SchurathFrom:Journal of Physical Chemistry A (Vol. 109, Issue 11) Peer-Reviewed

  Mar. 24, 200561 words Article

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• Mid-infrared extinction spectra and optical constants of supercooled water droplets

  Authors:Robert Wagner, Stefan Benz, Ottmar Mohler, Harald Scathoff, Martin Schnaiter, and Ulrich SchurathFrom:Journal of Physical Chemistry A (Vol. 109, Issue 32) Peer-Reviewed

  Aug. 18, 200547 words Article

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• Quasi-spherical ice in convective clouds

  Authors:Emma Jarvinen, Martin Schnaiter, Guillaume Mioche, Olivier Jourdan, Valery N. Shcherbakov, Anja Costa, et al.From:Journal of the Atmospheric Sciences (Vol. 73, Issue 10) Peer-Reviewed

  Oct. 2016 Author abstract, Rep...

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• Aerosol chamber study of optical constants and N2O5 uptake on supercooled H2SO4/H2O/HNO3 solution droplets at polar stratospheric cloud temperatures

  Authors:Robert Wagner, Karl-Heinz Naumann, Alexander Mangold, Ottmar Mohler, Harald Saathoff, and Ulrich SchurathFrom:Journal of Physical Chemistry A (Vol. 109, Issue 36) Peer-Reviewed

  Sept. 15, 200568 words Article

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• A machine learning approach to aerosol classification for single-particle mass spectrometry

  Authors:Costa D. Christopoulos, Sarvesh Garimella, Maria A. Zawadowicz, Ottmar Mohler, and Daniel J. CziczoFrom:Atmospheric Measurement Techniques (Vol. 11, Issue 10) Peer-Reviewed

  Oct. 18, 2018264 words Author abstract, Bri...

  Compositional analysis of atmospheric and laboratory aerosols is often conducted via single-particle mass spectrometry (SPMS), an in situ and real-time analytical technique that produces mass spectra on a...