Traditional Culture Encyclopedia - Weather inquiry - What are the sunrise and sunset times on the summer solstice?

What are the sunrise and sunset times on the summer solstice?

The summer solstice represents the official beginning of summer, and it is also a small forecast that summer is about to get hot. The solstice in summer is not necessarily hot weather. In addition, the summer solstice has an obvious feature, that is, the longest day and the shortest night. Do you know when the sun rises and sets on the summer solstice on 20 16? Let's get to know each other.

What are the sunrise and sunset times on the summer solstice? A: During the summer solstice, the sunrise time is 6: 34: 08 in the morning and the sunset time is 6: 43: 12 seconds.

Given the latitude a of the direct sunlight point on the earth, find the sunrise time of any point on the earth (the known latitude is b), and get a formula: t = 12 * arccos (TGA * TGB)/π (applicable to the northern hemisphere), summer solstice: the direct sunlight point is also on the tropic of cancer, and a = b = 23. Sunrise time and sunset time are symmetrical at noon 12, so the sunset time from summer to morning is 6: 43 pm12 seconds. The time of sunrise and sunset will change with the season and the latitude of different places. The summer solstice is the longest day and the shortest night in the northern hemisphere. Most people intuitively think that the sunrise time from summer solstice is also the earliest in a year, and the sunset time is the latest. But in fact, the earliest sunrise usually occurs in the early June before the summer solstice, and the latest sunset is from the end of June to the beginning of July after the summer solstice.

Representative cities with long days from summer to Sunday: representative cities are: Harbin with long days 15 hours and 43 minutes; Beijing days 15 hours 1 min; The length of Jinan day is 14 hours and 40 minutes; Shanghai days 14 hours 1 1 min; Hangzhou day length is 14 hours and 7 minutes; The length of Fuzhou day is 13 hours and 46 minutes; Guangzhou day length is 13 hours and 34 minutes; The length of daylight in Hong Kong is 13 hours and 30 minutes.

Characteristics of summer solstice: Although summer solstice has the longest day and the highest sun angle, it is not the hottest time of the year. Because, close to the surface of the heat, at this time still continue to save, did not reach the maximum time. As the saying goes, "Hot days are in dog days", and the real hot weather is calculated by summer solstice and beginning of autumn. From mid-July to mid-August, the temperature is the highest in all parts of China, and the highest temperature in some areas can reach about 40 degrees. From summer to the sun, the sun directly reaches the northernmost point of the year, almost directly to the Tropic of Cancer (23 27' north latitude), and the daytime in the northern hemisphere is the longest, and the farther north it is, the longer it is. After the summer solstice, the position of direct sunlight on the ground gradually moved southward, and the days in the northern hemisphere became shorter and shorter. "However, the summer solstice is not hot." "The summer solstice is already three years old." Although the summer solstice indicates that the hot summer has arrived, it is not the hottest time. After the summer solstice, the temperature will continue to rise for some time, and about twenty or thirty days is the hottest weather. After the summer solstice, the ground is heated strongly and the air convection is strong, and thunderstorms are often easy to form in the afternoon to evening. This kind of hot thunderstorm comes and goes, and the rainfall range is small. People call it summer rain over the mountains. In the south, Liu Yuxi, a poet in the Tang Dynasty, skillfully used this weather and wrote a famous poem about the sunrise in the east and the rain in the west, saying that there is no sunny, only sunny.

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