With more and more extreme weather, will the cycle of four seasons disappear in a few years, leaving only summer?
No matter how extreme the weather is, the four seasons will never disappear compared to human history, let alone only summer. Extreme weather:
Extreme weather may make summer hotter or cooler and last a little longer. Extreme changes in precipitation may cause droughts and floods. For example, this year's high temperature lasted for 67 days in the south and Europe. The drought that has occurred in 500 years is rare in history. In the 2020 Yangtze River flood, five numbered flood peaks occurred. These are all manifestations of extreme weather in summer. Although they are a bit extreme, they occur in summer after all and do not occur in other seasons. They do not affect the cycle of the four seasons. They are just climate fluctuations and summer will not last long.
In some years, due to abnormal atmospheric circulation, the subtropical high pressure extends westward, and the La Niña phenomenon occurs in the eastern Pacific, resulting in a longer summer, but not particularly extreme. For example, the average number of days in summer is 93 days, which may be the case this year. When it reaches 100 days, it is only extended by about 7 days, or longer by 10 days. Summer has come to an end and must eventually go away. Because the direct sunlight point returns to the southern hemisphere from the summer onwards, which does not support the continuation of the heat in the northern hemisphere, the subtropical high pressure will also show a devastating trend and collapse, and the cool autumn will come soon. Will summer really disappear in thousands of years?
Thousands of years are a long time for human history, but for the history of the earth’s development, it is just the blink of an eye.
If summer disappears after thousands of years, unless the yellow-red angle decreases to 0 degrees, the height of the sun will no longer change, and the four seasons will really no longer cycle. There is also a possibility of large-scale orogeny. Is this possible?
Let’s first talk about the change of the yellow-red angle. This angle is not fixed and changes slowly. This is due to the precession and nutation of the earth’s rotation axis and the combined influence of other planets on the earth’s orbit. The position of the vernal equinox moves westward. The range of yellow-red angle changes is from 22°00′ to 24°30′, and the period of change is about 41,000 years. The last minimum value of the yellow-red angle was about 28,000 years ago. The yellow-red cross angle is decreasing at a rate of about 46.84″ per century. The yellow-red cross angle at 12 o’clock on January 0, 2013 (2013.0) was 23°26′15.3308″.
The range of changes in the yellow-red angle is from 22°00′ to 24°30′, and it is impossible to produce 0 degrees. The four seasons will not disappear. The period of change is about 41,000 years. Compared with thousands of years of history, In general, it is slower. For this reason, after thousands of years, the four seasons will have some slight changes, but the four seasons will still exist.
Everyone knows that there was a large-scale Pacific Rim orogeny more than 200 million years ago, which caused great changes in the climate. At that time, the earth's surface was humid, with long summers and no winters, a hot climate, and lush vegetation. , dinosaurs were born accordingly. The largest dinosaur weighed more than 60 tons and became the dominant animal on the earth. In the Cenozoic era, the Himalayan orogeny occurred 200 to 300 million years ago, the Tibetan Plateau rose, and humans were born. We Today's climate was formed after this orogeny. Although there are small interglacial changes, the climate is still very stable.
The last Pacific Rim Movement was about 200 million years from the Himalayan Orogeny cycle. If calculated according to this cycle, it has just passed a few million years, and there are still hundreds of millions of years when the earth is in a stable period. The wind system will not change much, the climate will remain stable, winter will not disappear after thousands of years, and summer will still exist. Of course, with the emergence of large-scale orogeny, humans may evolve into more advanced life phenomena. It's just a matter of the seasons not rotating. It's truly changing, and humans can't predict or change it.