ACP - Special issue
Immersion freezing of ice nucleation active protein complexes
Atmos. Chem. Phys., 13, 5751-5766, 2013
Experimental quantification of contact freezing in an electrodynamic balance
Atmos. Meas. Tech., 6, 2373-2382, 2013
Immersion freezing of birch pollen washing water
Atmos. Chem. Phys., 13, 10989-11003, 2013
Influence of surface morphology on the immersion mode ice nucleation efficiency of hematite particles
Atmos. Chem. Phys., 14, 2315-2324, 2014
Kaolinite particles as ice nuclei: learning from the use of different kaolinite samples and different coatings
Atmos. Chem. Phys., 14, 5529-5546, 2014
Particle surface area dependence of mineral dust in immersion freezing mode: investigations with freely suspended drops in an acoustic levitator and a vertical wind tunnel
Atmos. Chem. Phys., 14, 12343-12355, 2014
A comprehensive parameterization of heterogeneous ice nucleation of dust surrogate: laboratory study with hematite particles and its application to atmospheric models
Summary: A new heterogeneous ice nucleation parameterization is developed and implemented in cloud models. The results of our simulations suggest stronger influence of dust particles lifted to the upper troposphere on heterogeneous nucleation and more ice nucleation at temperature and humidity conditions relevant to both mixed-phase and cirrus clouds when compared to the existing parametrical frameworks.
Atmos. Chem. Phys., 14, 13145-13158, 2014
BINARY: an optical freezing array for assessing temperature and time dependence of heterogeneous ice nucleation
Summary: A new optical freezing array for the study of heterogeneous ice nucleation in microliter-sized droplets is introduced, tested and applied to the study of immersion freezing in aqueous Snomax suspensions. Using different cooling rates, a small time dependence of ice nucleation induced by two different classes of ice nucleators was detected and the corresponding heterogeneous ice nucleation rate coefficient was quantified.
Atmos. Meas. Tech., 8, 689-703, 2015
Intercomparing different devices for the investigation of ice nucleating particles using Snomax® as test substance
Summary: Immersion freezing measurements from seven different measurement techniques were intercompared using a biological ice nucleating material from bacteria. Although different techniques examined differently concentrated droplets, it was possible to find a uniform description, which showed that results from all experiments were generally in good agreement and were also in agreement with parameterizations published earlier in literature.
Atmos. Chem. Phys., 15, 1463-1485, 2015
A comprehensive laboratory study on the immersion freezing behavior of illite NX particles: a comparison of 17 ice nucleation measurement techniques
Summary: Seventeen ice nucleation measurement techniques contributed to investigate the immersion freezing behavior of illite NX. All data showed a similar temperature trend, but the measured ice nucleation activity was on average smaller for the wet suspended samples and higher for the dry-dispersed aerosol samples at high temperatures. A continued investigation and collaboration is necessary to obtain further insights into consistency or diversity of ice nucleation measurements.
Atmos. Chem. Phys., 15, 2489-2518, 2015
Ice nucleation by water-soluble macromolecules
Atmos. Chem. Phys., 15, 4077-4091, 2015
Single-particle characterization of ice-nucleating particles and ice particle residuals sampled by three different techniques
Atmos. Chem. Phys., 15, 4161-4178, 2015
New particle-dependent parameterizations of heterogeneous freezing processes: sensitivity studies of convective clouds with an air parcel model
Summary: In mid-latitudes, the major fraction of precipitation is initiated via the ice phase. Cloud model simulations estimated the role of aerosol particle types and heterogeneous freezing modes on the ice phase. The results show that the formation of mixed-phase and ice clouds is promoted by the immersion freezing mode, broad drop size spectra containing small as well as large drops, insoluble particles composed by bacteria, feldspar, and illite, and temperatures below -25°C.
Atmos. Chem. Phys., 15, 12741-12763, 2015