Blizzard in the north, 3 1 degree in the south. Why is the temperature difference between north and south so big?

I went to Harbin on business once, it was 165438+ October, and the temperature in my hometown was still very high, because I was from the south. However, after I went to Harbin, I saw heavy snow as soon as I got off the plane. I have to say, the temperature difference between north and south is too big. Especially in early winter, southerners must take more clothes when they go to the north for business. Someone asked, the snowstorm in the north, 3 1 degree in the south, why is the temperature difference between the north and the south so large? First of all, because the direct point of the sun is in the southern hemisphere after winter, the closer to the south, the higher the temperature. Secondly, because the direct point in winter is in the southern hemisphere, the closer to the north, the longer the night time. Finally, the cold air goes south from the north, so the power of the cold air in the north will be even greater. Next, let's take a concrete look.

First, because the direct point of the sun is in the southern hemisphere after winter, the closer to the south, the higher the temperature. In winter, the direct point of the sun is in the southern hemisphere. So the energy of sunlight is stronger near the direct point. The farther away from the direct point, the weaker the energy radiated by the sun. The north is farther from the direct point of the sun, so it is colder in the north.

Second, because the direct point in winter is in the southern hemisphere, the closer to the north, the longer the night time. Because the direct point in winter is in the southern hemisphere, the farther away from the direct point, the shorter the daytime. Therefore, the farther the north is from the direct point of the sun, the shorter the days in a day and the less solar energy it receives. As a result, it is colder in the north.

Third, cold air moves downward from the north, so the power of cold air in the north will be greater. Cold air moves from north to south, and the intensity of cold air received in the north is definitely stronger. The farther south we go, the weaker the cold air becomes. Therefore, it will be warmer in the south.

Therefore, it is not difficult to understand why the temperature difference between north and south is so large through the above analysis. So, do you prefer to live in the south or the north?