今天是2017年12月22日,农历的冬至节气。
一般来说,今天是北半球一年中白天最短的一天,太阳光直射南回归线。之后直射点慢慢往北移动,北半球的白天便越来越长,平均温度也会越来越高,这样春天,夏天也就来了。直到第二年的6月22日左右,那天便是夏至节气,一年中白天最长的一天。再往后太阳光直射点转头向南移动,北半球温度越来越低,秋天冬天便又来到,周而复始,从而形成一年的四季。
今天的沈阳很是暖和,而一个多星期前还刮着凛冽的寒风,等车的那一小会儿就吧我的手冻得僵硬。看这个样子,今年的冬天可能是最近几年最为温暖的冬天,几天前的雪早已消失无踪,今年剩下的时间还能不能下雪,也许就这样了。
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