The materials which are selected in this area in about recent 35 years. From analyzing and researching, the appears of primary frost has the direct relation to the upper air circulation situation and the overland sky condition.
选取了该区近35a出现初霜的资料,经过分析研究发现,初霜冻的出现和高空环流形势及地面的天空状况有直接的关系。
based on studying the upper and lower air circulation of 36 weather processes, four synoptic models are given.
根据对36个历史个例的高低空环流形势的分析,建立了4种强冰雪冻害的天气概念模型:冷涡型、深槽型、浅槽型、锋区平直型;
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