Xiamen staged the city of the sky, and now it is rare for the sky to be warm at night.

Yesterday, after a storm in Xiamen, the city of the sky was staged, and a rare sky phenomenon appeared, that is, warm lampposts at night. This kind of sky is extremely rare and beautiful. Let's use the knowledge of constellations to reveal this sky in detail! Let's have a look!

A rare sky city warm night lamppost appeared in Xiamen yesterday evening, a rare sky "warm night lamppost" appeared over Xiamen. According to Hu Xiao, a meteorologist, it rained in Xiamen yesterday afternoon, and it stopped around the evening, so the air was very humid. In addition, the wind at high altitude is small, and the cirrus clouds like ice crystals form a "mirror" state, thus reflecting the lights on the ground into the night.

What is a warm night lamp post? "Warm night lamp post" is one of the wonders of "lamp post". Presumably, many people only heard or watched "Cold Night Lamppost" before last night. The so-called "cold night lamp post" refers to the special ice crystals in the sky at low temperature, which reflect the light on the ground to form wonders in the air. A series of colored beams, like swords, rose from the ground, which was very shocking. Because this kind of wonder mostly happens in winter nights in cold regions, it is called "cold night lamp post". However, the "warm night lamp post" that appeared on 10 night happened in the warm Xiamen. Monitoring shows that the temperature in Xiamen was generally around 23 from 20: 00 to 2 1 yesterday, while the temperature at the time of the "cold night lamppost" incident was usually below MINUS 20, and the temperature difference between them was far above 40. According to Hu Xiao's analysis, temperature change is not the decisive factor for the formation of the "lamppost" spectacle. What really matters is the state of the wind and atmospheric clouds. In Xiamen, which just rained yesterday, the air humidity is very high, and the influence of low clouds on the ground has ended, leaving only high clouds with ice crystals in the air. In addition, the wind at high altitude is low. Therefore, in windless weather, the ice crystals in the cloud are evenly arranged horizontally, just like a mirror, thus reflecting the lights on the ground to night. The "lamppost" appears in the cold night because all the ice crystals are suspended in the air under the premise of calm weather, and the whole atmosphere becomes a "curtain" of lights on the ground, so there are some differences between the two. Xiamen, a "warm night lamp post", can be described as "something you can meet but you can't ask for", which is the best in your life. Because compared with the "cold night lamp post", the "warm night lamp post" has more stringent requirements on meteorological conditions, and it can't be affected only by medium and low clouds, only high clouds exist; It also needs high air humidity, good air permeability and low wind power at high altitude; The existence of ice crystals is indispensable, so this spectacle is really extremely rare.