Why isn't summer the hottest on the solstice?

The solstice of summer means the arrival of summer. The hot sunshine and endless rainy days can be said to be changeable. On this day, the northern hemisphere ushered in the longest day, but it was not the hottest. Then, this issue of the "Old Yellow Calendar" will show you why the summer of solstice is not the hottest.

Why isn't summer the hottest on the solstice? The heat we usually feel is actually not radiated by the sun, but reflected from the ground to the atmosphere, because the earth is wrapped in a dense atmosphere. Near the ground is our direct heat source. Although the ground absorbs a lot of heat during the summer solstice, it takes about one month to release it completely.

On the day of summer solstice, the northern hemisphere receives the most heat from the sun, but in the next few days, although the position of the sun is not the highest, it is still quite high; Sunshine is not the longest, but it is still quite long. The heat received every day exceeds the heat lost, so the average daily temperature keeps rising and reaches the highest in dog days.

The earth is wrapped in a dense atmosphere, and sunlight directly penetrates the atmosphere to heat the ground; The ground gives the tropics to the air through infrared radiation, air convection and water evaporation. For the heat radiated by the sun, the atmosphere is unimpeded, but it is slow and difficult to get out, which is a bit "wide in and strict out" and forms a heat preservation function.

This makes the surface temperature not too high, and at night, the heat makes the surface temperature not too low. In this way, the average daily temperature does not depend entirely on how much heat you get from the sun, but on the difference between the heat you get every day and the heat you lose.

On the day of summer solstice, the northern hemisphere receives the most heat from the sun, but in the next few days, although the position of the sun is not the highest, it is still quite high; Sunshine is not the longest, but it is still quite long. The heat received every day exceeds the heat lost, so the average daily temperature keeps rising and reaches the highest in dog days.

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