Classification of Winters by Snow Cover (Sinoptichesicie i Chislennye Metody Analiza i Prognoza Pogody),
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
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The author discusses four types of winters and the characteristics that define each type of winter. A winter with much snow is considered to be one when the mean 10-day depths of snow cover deviate by more than 25 from the mean long-term 10-day values during the course of 23 of the winter. If the 10-day depth of the snow cover deviates from the long term 10-day values during the entire winter in any direction by less than 25 the winter is considered to be one with title snow. A winter with infrequent variations in depth of snow cover from positive deviations to negative and vice versa during the entire winter or between, its first and second halves was classified as unstably snowy. Thus, the classification of winters was based on the snow cover and on its changes during the course of the winter.
- Snow, Ice and Permafrost