天气预报 > 其他 > 夏天为什么白天长夜晚短
夏天为什么白天长夜晚短
更新时间: 2020-11-02 00:00:00  

夏天白天长夜晚短是因为黄赤交角的存在导致太阳直射点在地球南北回归线之间来回移动的现象造成的。夏季时太阳直射北半球,晨线向西倾斜,昏线向东倾斜,北半球的白昼范围变大,于是白天长黑夜短。冬季时,太阳直射南半球,晨线向东倾斜,昏线向东倾斜,白昼范围变短,也就白天短黑夜长。从夏至到秋分,太阳直射点向南移动,北半球昼变短夜变长。

关键词: 夏天 为什么 白天 夜晚

夏天为什么白天长夜晚短相关经验

天气预报

最新推荐

页面:/news/view-395730/ | 耗时:0.5273 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=395730 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=395730 LIMIT 0,1
select * from tbl_Articles_sphinx where id=395730 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1685451,735270,1289274,1762773,1711066,1880332,1100527,3256822,727839,211196,1746864,1607488,158544,867746,1866734,1681043,1916415,437351,3053223,123674,3040774,343699,351024,452318,1951046,319322,1748876,1130134,581864,1072681) ORDER BY field (ArticleID,1685451,735270,1289274,1762773,1711066,1880332,1100527,3256822,727839,211196,1746864,1607488,158544,867746,1866734,1681043,1916415,437351,3053223,123674,3040774,343699,351024,452318,1951046,319322,1748876,1130134,581864,1072681)