Snow Crystal Growth: Electron Microscope Study of Snow Crystal Nuclei (Advance communication)
نویسندگان
چکیده
منابع مشابه
Snow crystal imaging using scanning electron microscopy: I. Precipitated snow
Low-temperature scanning electron microscopy (SEM) was used to observe precipitated snow crystals. The newly-fallen snow crystals were obtained in storms at Beltsville, Maryland, and at Bearden Mountain near Davis, West Virginia, USA. The snow samples were mounted on modified SEM stubs, frozen in liquid nitrogen, sputter coated with platinum, and imaged with an electron beam. Many types of prec...
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Low-temperature scanning electron microscopy (SEM) was used to observe metamorphosed snow crystals and grains obtained in the field. Metamorphosed snow was obtained from seasonal snowpacks in the Colorado Rocky Mountains and in Alaska. The snow samples obtained in snowpits were mounted on modified SEM stubs, frozen in liquid nitrogen, transported in Dewar flasks to the SEM facility, sputter coa...
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We review several aspects of aerodynamics that affect the growth, morphology, and symmetry of snow crystals. We derive quantitative estimates for aerodynamical forces that orient falling snow crystals, estimate how air flow around snow crystals affects their growth rates (the ventilation effect), and examine how the combination of orientation and growth modification can stabilize or destabilize...
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Growth-deviation model to understand the perceived variety of falling snow J. Nelson College of Science and Engineering, Ritsumeikan University, Nojihigashi 1-1-1, Kusatsu 525-8577, Japan Received: 20 December 2007 – Accepted: 9 January 2008 – Published: 4 March 2008 Correspondence to: J. Nelson ([email protected]) Published by Copernicus Publications on behalf of the European Geoscienc...
متن کاملSnow crystal imaging using scanning electron microscopy: III. Glacier ice, snow and biota
Low-temperature scanning electron microscopy (SEM) was used to observe metamorphosed snow, glacial firn, and glacial ice obtained from South Cascade Glacier in Washington State, USA. Biotic samples consisting of algae (Chlamydomonas nivalis) and ice worms (a species of oligochaetes) were also collected and imaged. In the field, the snow and biological samples were mounted on copper plates, cool...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1951
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000026216