EVOLUTIONARY CONCEPTION OF SNOW METAMORPHISM BASED ON CRYSTAL-MORPHOLOGY AND THEORY OF SYMMETRY
The paper presents a novel approach to the study of development of microstructures in snowpack based on the crystal-morphology and on the fundamental laws of natural symmetry. An empirical deterministic model describing the sublimation-metamorphic cycle in seasonal snow cover and the polymorphic var...
| Published in: | Ice and Snow |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | Russian |
| Published: |
IGRAS
2015
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| Subjects: | |
| Online Access: | https://ice-snow.igras.ru/jour/article/view/222 https://doi.org/10.15356/2076-6734-2012-3-31-46 |
| Summary: | The paper presents a novel approach to the study of development of microstructures in snowpack based on the crystal-morphology and on the fundamental laws of natural symmetry. An empirical deterministic model describing the sublimation-metamorphic cycle in seasonal snow cover and the polymorphic variants of this cycle is suggested. Staging in the formation of crystal shapes and self-development of snow microstructure in snow layers is revealed. The crystal shapes are the result of successive process of superposition of ice crystal-chemical symmetry and dissymmetry of the soil – snow cover – atmosphere system, according to the known P. Curie principle. Morphological classification of snow crystals in seasonal snow cover is developed on the base of evolutionary model. Evolution of snow microstructure is conditioned by a marked degree by probabilistic conformity to natural laws, manifesting itself in the processes of auto-regulation of metamorphism. These processes include two types of regulation: the self-regulation of snow layers, on the one hand, and the regulation related to external conditions – under the influence of atmospheric perturbations, on the other hand. The accounting the processes of auto-regulation of snow metamorphism for allows development of new methods in short- and long-term avalanche forecast. Изложена эмпирически обоснованная теория эволюции сезонного снежного покрова, опирающаяся на его кристалломофологию и фундаментальные законы природной симметрии. Это – принципиально новое направление в развитии структурного снеговедения как самостоятельной отрасли гляциологии. Снежный покров рассматривается в качестве иерархически организованного сообщества форм кристаллов, растущих в тесном взаимодействии через парообразную фазу и испытывающих регулирующее (направляющее) воздействие извне, прежде всего со стороны атмосферы.В свете известного принципа симметрии–диссимметрии П. Кюри развитие структуры снега представляет собой необратимый во времени процесс, который состоит из последовательных этапов ... |
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