Investigation of growth kinetics and morphology of sodium fluorosilicate ice‐analogue crystals in solutions and gels

Krasiński, Mariusz J.; Krasinska, Krystyna R.; Ulanowski, Zbigniew

doi:10.1002/crat.200711012

Cited by 6 publications

(6 citation statements)

References 14 publications

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“…An analogue ice particle aggregate with severely roughened surfaces was placed on a thin polycarbonate window with anti-reflective coating. See Krasinski et al (2007) for a description on how these ice analogue particles can be produced in the laboratory. After a visual inspection of the analogue aggregate under the optical microscope (left image of Fig.…”

Section: Interactive Discussionmentioning

confidence: 99%

Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds

Schnaiter¹,

Järvinen²,

Vochezer³

et al. 2015

Preprint

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This study reports on the origin of ice crystal complexity and its influence on the angular light scattering properties of cirrus clouds. Cloud simulation experiments were conducted at the AIDA (Aerosol Interactions and Dynamics in the Atmosphere) cloud chamber of the Karlsruhe Institute of Technology (KIT). A new experimental procedure 5 15 measured by the two currently available airborne polar nephelometers; the Polar Nephelometer (PN) probe of LaMP and the Particle Habit Imaging and Polar Scattering (PHIPS-HALO) probe of KIT. The measured scattering functions are featureless and flat in the side-and backward scattering directions resulting in low asymmetry parameters g around 0.78. It was found that these functions have a rather low sensitivity to the 20 crystal complexity for ice clouds that were grown under typical atmospheric conditions. These results have implications for the microphysical properties of cirrus clouds and for the radiative transfer through these clouds. 30512ACPD 15, 2015 Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds M. 25tering properties to improve their retrieval algorithms. The cirrus ice crystal model used in these algorithms has successively been extended in order to cover the increasing ice cloud remote sensing observations like spectral reflection, polarization and depo-30513

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Section: Interactive Discussionmentioning

confidence: 99%

Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds

Schnaiter¹,

Järvinen²,

Vochezer³

et al. 2015

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…An analogue ice particle aggregate with severely roughened surfaces was placed on a thin polycarbonate window with anti-reflective coating. See Krasinski et al (2007) for a description of how these ice analogue particles can be produced in the laboratory. After a visual inspection of the analogue aggregate under the optical microscope (left image of Fig.…”

Section: Data Availabilitymentioning

confidence: 99%

Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds

et al. 2016

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Abstract. This study reports on the origin of small-scale ice crystal complexity and its influence on the angular light scattering properties of cirrus clouds. Cloud simulation experiments were conducted at the AIDA (Aerosol Interactions and Dynamics in the Atmosphere) cloud chamber of the Karlsruhe Institute of Technology (KIT). A new experimental procedure was applied to grow and sublimate ice particles at defined super-and subsaturated ice conditions and for temperatures in the −40 to −60 • C range. The experiments were performed for ice clouds generated via homogeneous and heterogeneous initial nucleation. Small-scale ice crystal complexity was deduced from measurements of spatially resolved single particle light scattering patterns by the latest version of the Small Ice Detector (SID-3). It was found that a high crystal complexity dominates the microphysics of the simulated clouds and the degree of this complexity is dependent on the available water vapor during the crystal growth. Indications were found that the small-scale crystal complexity is influenced by unfrozen H 2 SO 4 /H 2 O residuals in the case of homogeneous initial ice nucleation. Angular light scattering functions of the simulated ice clouds were measured by the two currently available airborne polar nephelometers: the polar nephelometer (PN) probe of Laboratoire de Métérologie et Physique (LaMP) and the Particle Habit Imaging and Polar Scattering (PHIPS-HALO) probe of KIT. The measured scattering functions are featureless and flat in the side and backward scattering directions. It was found that these functions have a rather low sensitivity to the small-scale crystal complexity for ice clouds that were grown under typical atmospheric conditions. These results have implications for the microphysical properties of cirrus clouds and for the radiative transfer through these clouds.

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“…The interest on pure Na 2 [SiF 6 ] has been increasing in this decade due to the similar refractive index as the natural ice crystals in visible light [17]. Some success in synthesis of fine hexagonal prismatic Na 2 [SiF 6 ] crystals has been achieved when Na 2 CO 3 was added to a solution containing H 2 [SiF 6 ] and triethanolamine [18], also micron size mono-crystals can be obtained in tetramethoxysilane (TMS) gel [19]. It is well known that Na 2 [SiF 6 ] decomposes when heated above 500 1C [20].…”

Section: Introductionmentioning

confidence: 98%

A novel route of synthesis of sodium hexafluorosilicate two component cluster crystals using BF4− containing ionic liquids

Välbe

Mäeorg

Lõhmus

et al. 2012

Journal of Crystal Growth

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Investigation of growth kinetics and morphology of sodium fluorosilicate ice‐analogue crystals in solutions and gels

Abstract: The original article can be found at: http://www3.interscience.wiley.com Copyright WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. DOI: 10.1002/crat.200711012 [Full text of this article is not available in the UHRA

Cited by 6 publications

References 14 publications

Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds

Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds

Cloud chamber experiments on the origin of ice crystal complexity in cirrus clouds

A novel route of synthesis of sodium hexafluorosilicate two component cluster crystals using BF4− containing ionic liquids

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