Recently in Beijing, the temperature at night is higher than that in the afternoon. What happened?

In summer, the temperature will appear in the evening, which is higher than in the afternoon. Personally, I think it's all because of the cooling before. When the temperature drops sharply, the ground temperature is also rising after being baked by the sun. Wait until you land? Heated Later, the sun just set, so there was the highest temperature period of the day.

In addition to this situation, it is also because at night, that is, at the busiest time of urban traffic, the exhaust gas from many vehicles and the hot air from air conditioners will also raise the ambient temperature.

Hot summer makes us think of hot weather first. According to common sense, the hottest time of the day will appear at two o'clock in the afternoon? Between four o'clock. The air fluctuates frequently and occasionally, and the temperature is higher in the evening than in the afternoon. This situation exists because of the following two factors.

First, the temperature fluctuates greatly. Before the temperature in Beijing was higher at night than in the afternoon, a cold air came and the temperature dropped sharply. Because of the cold air, the rainfall makes the temperature drop, and the whole surface temperature also drops.

When the sun rises the next day, the temperature will gradually rise. At this time, because the surface temperature is not high, the surface can absorb heat continuously. At dusk, the heat absorbed by the surface reaches the maximum value in a day, which will also raise the ambient temperature, so that the temperature will be higher than that in the afternoon.

Second, urban traffic has raised the ambient temperature. Beijing is a city with a population of nearly 22 million. As an international metropolis, even if people exhale carbon dioxide, it can exert a subtle influence on the environmental temperature. In this case, coupled with the heat released by vehicles in summer, it will further aggravate the ambient temperature rise.

Many buildings in the city have good heat absorption characteristics. When the temperature of the external environment drops, the buildings that absorb heat will begin to release heat. This is also an important reason why many buildings are hotter at night than during the day.