On the afternoon of May 3, when many provinces in the central and eastern parts of the mainland were ushering in a sunny and calm day, many southerners also noticed in the afternoon that in today's blue sky, the sun wore a "hat" - such as Fuzhou, Fujian Province, and many netizens took photos around noon today showed that a wide aperture was appearing around the sun, which looked particularly spectacular.
Fuzhou's sun halo, from Weibo netizen @ interview the enthusiastic citizen Mr. Li
In addition to Fujian, a similar phenomenon also occurs in Jiangxi in the south today. Photos released by the Nanchang Meteorological Service Center on the social platform show that there is also a spectacular phenomenon of "sun hats" over Nanchang today. Judging from the photos taken by everyone, whether it is the solar aperture of Nanchang or Fuzhou today, the inner circle is red light, and the outer circle is purple, which is a solar halo phenomenon.
Halos are optical phenomena formed by the refraction or reflection of sunlight or moonlight by ice crystals suspended in the atmosphere. Halos are usually ring-shaped or arc-shaped, with seven colors like a rainbow, red, orange, yellow, green, blue, indigo, and purple, so it is also called "white rainbow". The reflection of the sun irradiated ice crystals to the human eye is called "solar halo", while the reflection of the moon irradiated ice crystals to the human eye is called "lunar halo". Ice crystals in the atmosphere are usually brought by cirrus clouds, and when sunlight hits the ice crystals, they are reflected in the human eye, creating a ring or arc of coils.
As the saying goes, "the sun halo three more rainy", today's sun halo in many parts of the south has made many people worry, is the emergence of a large-scale solar halo phenomenon a precursor to the change of the sky in the south? Is the good weather in the south coming to an end? The appearance of the solar halo is generally accompanied by high-level cirrus clouds, which are usually located in the system in front of the front in meteorology, indicating that there may be cold air pushing forward, and the weather changes are not far away, so the solar halo is considered a precursor to weather changes. But this law is not entirely applicable, and it is still necessary to analyze the specific problems - today, as the cold air completely moves south, the rainy belt is mostly pushed into the sea, and the weather in most of the southern part of the continent is sunny.
In Fujian and Jiangxi, Fujian is actually affected by the high-altitude ice crystals thrown from the periphery of this rainy system, while in Jiangxi, a small number of cirrus ice crystals are blown from the sky, resulting in a spectacular solar halo phenomenon. But overall, dry air masses are gaining full power in the east-central region, with rain not making a comeback until May 6, and most of the south can continue to be calm for several days.