2. The summer solstice is the shortest time when the sun shines directly on the Tropic of Cancer in a year, so a day is the longest in a year. Because it is in the rainy season, it is not the hottest day of the year.
3. From the climate point of view, it will rain or even rainstorm in most parts of China from summer to Sunday. This is because the summer solstice is usually June 2 1~22, and the middle and lower reaches of the Yangtze River in China are affected by cold and warm air and subtropical high convection, which will cause continuous rainfall, and at the same time, affected by the cold air at sea, which will blow the convection inland and directly affect most parts of China.
After the summer solstice, the temperature will continue to rise, and strong convective weather will also appear. Although the rain in the rainy season will temporarily alleviate the high temperature, the heat absorbed by the surface is much greater than the heat emitted, and the heat will continue to accumulate, and the temperature will rise day by day after the summer solstice.
5, three volts, refers to three days. Under normal circumstances, the whole dog days will last for about 40 days. The third Geng day from summer to the future is the day of accommodation. The third to the fourth Geng day is called initial lodging, the fourth Geng day is medium lodging, and the first Geng day after beginning of autumn is the beginning of final lodging, which lasts for 65,438+00 days and will finally come out.
6. The reason for the three-volt heat is that after the summer solstice, direct sunlight will generate a lot of heat, and the heat absorbed by the surface is far greater than the heat emitted. Without the influence of large airflow, the heat in the air will continue to accumulate, forming a high temperature and sultry phenomenon, especially in late summer. This phenomenon is the most obvious.