Why is it cold in winter?

In winter, the temperature difference between north and south can reach tens of degrees. Why is it colder in winter in the north? Everybody? This topic is very good. The first is a hot topic in society, grounding gas, which can attract people's attention. Secondly, this problem has the nature of popular science. As we know, as writers, their duties mainly include three aspects: first, to explain the facts, clarify the fallacies, guide public opinion, and play the role of speaking for the public and shouting for justice; Second, writers should carry forward the correct value orientation and positive energy.

Third, and most importantly, writers should realize that they have the duty to preach and dispel doubts, and it is our duty to do a good job in popular science for the people. Today's topic has popular science value and is a good question. Bian Xiao will talk about this topic. In fact, the climate difference between north and south is first manifested in the temperature. The northern region is hot in summer and cold in winter, and the temperature is high all year round. The south is hot in summer and warm in winter, and the annual temperature difference is smaller than that in the north.

In addition, the precipitation difference between the north and the south is quite large. The climate in the south is humid, with more precipitation and less precipitation in the north. Because the summer monsoon landed from the southeast coast, the precipitation brought by it affected our country from south to north, so there was a lot of precipitation in the south, and the rainy season began in April and ended at 10, while in the north it was July and August, and the time was short. So, why is it colder in winter in the north? The main reason is the high latitude in the north. Compared with the south, the solar altitude angle in winter is small, the daytime is short, and there are many sunny days, so the received solar radiation energy is not much different. The northern region is close to the source of winter wind, which is greatly influenced by winter wind and has low temperature.

Finally, why is the dynamic temperature difference between north and south of China so large? In winter, the cold air invading China from Siberia in the north bears the brunt of the invasion to the north, which is one of the reasons why the energy is far less than before due to the twists and turns and peaks along the way when it reaches the south. The second reason is that the direct point of the sun in winter is in the southern hemisphere, which means that the farther north, the shorter the day and the longer the night, so the time for getting light in the north is shorter than that in the south. As the saying goes, it gets dark earlier in the north than in the south. The third reason is that the closer the solar radiation energy is to the direct point, the stronger it is, and the distance from the north to the direct point is much greater than that in the south in winter, so the temperature difference between the north and the south is quite large due to insufficient heating.