晚霜冻，是指每年春季最后一次出现的霜冻。是在初春气温回暖季节里，受北方强冷空气南下影响，短期内近地面气温骤然降低至0度以下，使作物遭受冻害或死亡的一种严寒现象。
近年来，气候恶化导致茶叶遭受晚霜冻害日益严重，每年由于晚霜造成的经济损失惨重。
In recent years, tea production has severely suffered from late frost damage in early spring because of the increasing climate deterioration.
冬小麦晚霜冻害由最低温度和小麦发育期两个因素确定，从数据库中查询不出晚霜冻害的确切资料。
Winter late freezing disaster (WFD) is decided by the minimum temperature and winter development periods, detailed data of WFD cann't be obtained from database.
利用1971 ~ 2005年甘肃省白银市辖区4个台站逐日地面最低温度资料，统计分析了早、晚霜冻发生的气候特征和时间变化规律。
By using the surface minimum temperature of 4 observational stations in the period 1971 ~ 2005 in Baiyin area, the spatial features and frost evolution were analyzed.
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