In winter, the iceperiod is longer, which brings on ice art there.
隆冬结冰期较长，异常寒冷，于是，这里就诞生了冰灯艺术的奇葩。
2
There was a period of excessive warmth which melted some of the polar ice.
有段时期温度过高，融化了极地的部分冰层。
《柯林斯英汉双解大词典》
3
Turns out the Cremonese violins were made from trees that grew during a Little Ice Age, a period when temperatures across Europe were significantly lower than normal.