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.
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。
The daily maximum surface temperature appears on the coping of the sand dune, the minimum temperature and the greatest diurnal temperature range appear on the windward slop.
沙丘表面日最高温出现在顶部，日最低温和日较差最大值出现在迎风坡。
The daily maximum surface temperature appears on the coping of the sand dune, the minimum temperature and the greatest diurnal temperature range appear on the windward slop.
沙丘表面日最高温出现在顶部，日最低温和日较差最大值出现在迎风坡。
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