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000820670 0247_ $$2ISSN$$a1520-0469
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000820670 1001_ $$0P:(DE-HGF)0$$aJärvinen, Emma$$b0$$eCorresponding author
000820670 245__ $$aQuasi-Spherical Ice in Convective Clouds
000820670 260__ $$aBoston, Mass.$$bAmerican Meteorological Soc.$$c2016
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000820670 520__ $$aHomogeneous freezing of supercooled droplets occurs in convective systems in low and midlatitudes. This droplet-freezing process leads to the formation of a large amount of small ice particles, so-called frozen droplets, that are transported to the upper parts of anvil outflows, where they can influence the cloud radiative properties. However, the detailed microphysics and, thus, the scattering properties of these small ice particles are highly uncertain. Here, the link between the microphysical and optical properties of frozen droplets is investigated in cloud chamber experiments, where the frozen droplets were formed, grown, and sublimated under controlled conditions. It was found that frozen droplets developed a high degree of small-scale complexity after their initial formation and subsequent growth. During sublimation, the small-scale complexity disappeared, releasing a smooth and near-spherical ice particle. Angular light scattering and depolarization measurements confirmed that these sublimating frozen droplets scattered light similar to spherical particles: that is, they had angular light-scattering properties similar to water droplets. The knowledge gained from this laboratory study was applied to two case studies of aircraft measurements in midlatitude and tropical convective systems. The in situ aircraft measurements confirmed that the microphysics of frozen droplets is dependent on the humidity conditions they are exposed to (growth or sublimation). The existence of optically spherical frozen droplets can be important for the radiative properties of detraining convective outflows.
000820670 536__ $$0G:(DE-HGF)POF3-244$$a244 - Composition and dynamics of the upper troposphere and middle atmosphere (POF3-244)$$cPOF3-244$$fPOF III$$x0
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000820670 7001_ $$0P:(DE-HGF)0$$aSchnaiter, Martin$$b1
000820670 7001_ $$0P:(DE-HGF)0$$aMioche, Guillaume$$b2
000820670 7001_ $$0P:(DE-HGF)0$$aJourdan, Olivier$$b3
000820670 7001_ $$0P:(DE-HGF)0$$aShcherbakov, Valery N.$$b4
000820670 7001_ $$0P:(DE-Juel1)156523$$aCosta, Anja$$b5$$ufzj
000820670 7001_ $$0P:(DE-Juel1)129108$$aAfchine, Armin$$b6$$ufzj
000820670 7001_ $$0P:(DE-Juel1)129131$$aKrämer, Martina$$b7$$ufzj
000820670 7001_ $$0P:(DE-HGF)0$$aHeidelberg, Fabian$$b8
000820670 7001_ $$0P:(DE-HGF)0$$aJurkat, Tina$$b9
000820670 7001_ $$0P:(DE-HGF)0$$aVoigt, Christiane$$b10
000820670 7001_ $$0P:(DE-HGF)0$$aSchlager, Hans$$b11
000820670 7001_ $$0P:(DE-HGF)0$$aNichman, Leonid$$b12
000820670 7001_ $$0P:(DE-HGF)0$$aGallagher, Martin$$b13
000820670 7001_ $$0P:(DE-HGF)0$$aHirst, Edwin$$b14
000820670 7001_ $$0P:(DE-HGF)0$$aSchmitt, Carl$$b15
000820670 7001_ $$0P:(DE-HGF)0$$aBansemer, Aaron$$b16
000820670 7001_ $$0P:(DE-HGF)0$$aHeymsfield, Andy$$b17
000820670 7001_ $$0P:(DE-HGF)0$$aLawson, Paul$$b18
000820670 7001_ $$0P:(DE-HGF)0$$aTricoli, Ugo$$b19
000820670 7001_ $$0P:(DE-HGF)0$$aPfeilsticker, Klaus$$b20
000820670 7001_ $$0P:(DE-HGF)0$$aVochezer, Paul$$b21
000820670 7001_ $$0P:(DE-HGF)0$$aMöhler, Ottmar$$b22
000820670 7001_ $$0P:(DE-HGF)0$$aLeisner, Thomas$$b23
000820670 773__ $$0PERI:(DE-600)2025890-2$$a10.1175/JAS-D-15-0365.1$$gVol. 73, no. 10, p. 3885 - 3910$$n10$$p3885 - 3910$$tJournal of the atmospheric sciences$$v73$$x1520-0469$$y2016
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