منابع مشابه
Frost flower formation on sea ice and lake ice
[1] Frost flowers are clusters of ice crystals found on freshly formed sea ice and occasionally on frozen lakes. They belong to a class of vapour-related phenomena that includes freezing fog, hoar frost and dew. It has hitherto been supposed that they form by condensation from a supersaturated atmosphere or from water wicked up through porous sea ice. Here we show that they can form on solid, p...
متن کاملFormation of ice lenses and frost heave
[1] I examine the morphology of ice growth in porous media. Intermolecular forces cause premelted fluid to migrate and supply segregated ice growth (e.g., lenses) and frost heave. I account for the net effect of these microscopic interactions in a homogenized model formulated in terms of fundamental physical properties and characteristics of the porous medium that can be measured; no ad hoc par...
متن کاملSea ice, frost flowers and halogen activation
First-year sea-ice contact predicts bromine monoxide (BrO) levels better than potential frost flower contact W. R. Simpson, D. Carlson, G. Hoenninger1,2,†, T. A. Douglas, M. Sturm, D. Perovich, and U. Platt Geophysical Institute and Department of Chemistry, University of Alaska Fairbanks, Fairbanks, AK 99775-6160, USA Institute for Environmental Physics, University of Heidelberg, Im Neuenheimer...
متن کاملBacterial ice nucleation: a factor in frost injury to plants.
Heterogeneous ice nuclei are necessary, and the common epiphytic ice nucleation active (INA) bacteria Pseudomonas syringae van Hall and Erwinia herbicola (Löhnis) Dye are sufficient to incite frost injury to sensitive plants at -5 degrees C. The ice nucleation activity of the bacteria occurs at the same temperatures at which frost injury to sensitive plants occurs in nature. Bacterial ice nucle...
متن کاملThe physics of frost heave and ice-lens growth
8 The formation of rhythmic lenses of ice in freezing soils is an intriguing geo9 physical phenomenon that is not fully understood, despite much experimental and 10 theoretical work over the past century. We review proposed mathematical models 11 of ice lens growth and frost heave, from early capillary theories and models based 12 on the concept of a frozen fringe, to more recent advances that ...
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ژورنال
عنوان ژورنال: Nature
سال: 1908
ISSN: 0028-0836,1476-4687
DOI: 10.1038/077295b0