冬寒指的是冬季强烈冷空气直入而引起的强烈降温,并出现严寒天气或严重冻害。在江西,按低温的强度,可分为-3℃、-5℃、-7℃、-9℃、-11℃、-13℃、-15℃等若干等级,各种低温出现的回数,以-3～-9℃四个等级较多,-9℃以下的冬寒出现很少。因此,笔者在本文中只选择12个有代表性的气象台站统计分析-3～-9℃四个等级的低温。 Winter refers to the strong cold in winter straight into the strong cooling caused, and the cold weather or severe frost damage. In Jiangxi, according to the intensity of low temperature, it can be divided into several grades of -3 ℃, -5 ℃, -7 ℃, -9 ℃, -11 ℃, -13 ℃, -15 ℃ and so on, -3 ~ -9 ℃ four levels are more, -9 ℃ below the winter there is little cold. Therefore, in this paper, I select only 12 representative meteorological stations statistical analysis -3 ℃ -9 ℃ four levels of low temperature.