As the cold air moves south, the temperature has plummeted recently, making people feel the coolness of autumn. So why is the cooling so fast?
First, we need to understand that changes in air temperature are determined by the heat balance in the atmosphere. When the Earth's surface absorbs less solar radiant energy, the heat in the atmosphere gradually decreases, resulting in a drop in temperature. And when solar radiation energy increases, the temperature rises.
Secondly, the southward movement of cold air is another important reason for the sudden drop in temperature. Cold air flows from high latitudes to low latitudes. When cold air moves south, it squeezes the otherwise warmer air upward, causing the temperature to drop. At the same time, the cold air can also condense the water vapor into clouds, creating rainy weather, which further lowers the temperature.
In addition, topography and the ocean also have an impact on air temperatures. For example, in mountainous areas, temperatures will be lower than in plain areas due to the higher terrain. In the oceanic climate zone, the temperature fluctuation is relatively small due to the regulating effect of the ocean.
There are many reasons for the temperature drop, among which the change of solar radiation energy, the southward movement of cold air, topography and ocean all play an important role. As the seasons change, we will gradually enter winter and the temperature will continue to drop. Therefore, we need to be prepared to keep warm from the cold to cope with the cold climate.