What is the climate after the partition of the mainland?

Climate warming refers to the phenomenon that the temperature of the earth's atmosphere and ocean rises in a period of time, mainly referring to the temperature rise caused by human factors. Worldwide, it is believed that it is caused by excessive emission of greenhouse gases (such as carbon dioxide). In recent 100 years, the global average temperature has experienced four fluctuations: cold → warm → cold → warm. Generally speaking, the temperature is on the rise. Since 1980s, the global temperature has obviously increased.

Continental Division (Pan-continental Division):

About 65.438+65 billion years ago, Pangu began to disintegrate and went through three stages. About1.800 million years ago, the tensile activity began. Magmatic activities along the east coast of North America, the northwest coast of Africa and the mid-Atlantic pushed North America to the northwest. As South America and North America moved away from each other, the Gulf of Mexico began to form. At the same time, on the other side of Africa, the western Indian Ocean was formed because of volcanic eruption extending along the borders of East Africa, Antarctica and Madagascar.

After the split of Pangea, in Mesozoic, North America and Eurasia were the same continent, which we sometimes called Laurentia. When the mid-Atlantic began to split, Laurentia began to rotate clockwise, pushing North America to the north and Eurasia to the south. Coal, which appeared in large quantities in East Asia in the early Jurassic, is now out of sight. Because the humid climate area of the Asian continent moved to the subtropical dry area, it was replaced by desert and salt deposition in the late Jurassic. The clockwise movement of Laurentia led to the closure of the V-shaped Paleo-Tethys Ocean, separating it from Gondwana. In the early Jurassic, Southeast Asia converged. The vast ancient Mediterranean separated the northern continent from Gondwana.

stage Ⅱ

Pangea began to split in the middle Jurassic, and by the late Jurassic, the middle Atlantic had split into a narrow ocean, separating North America from the eastern part of North America. At the same time, East Gondwana began to split with West Gondwana. During the Cretaceous, the South Atlantic opened. The Indian mainland separated from Madagascar and accelerated its northward movement. It is worth noting that North America and Europe are still connected at this time, and the Australian mainland is also a part of Antarctica.

The division of the second stage of Pangea began in the early Cretaceous, about 654.38+0.4 billion years ago. Gondwana continent is constantly becoming fragmented, including the South Atlantic that separates South America from Africa. And India and Madagascar drifting out of Antarctica; There are also cracks in the East Indian Ocean on the western edge of Australia. At this time, the South Atlantic did not open immediately, but gradually opened from south to north like a zipper. That's why the South Atlantic is wider.

The third stage

In the early Cenozoic, it entered the third stage of Pangu continent division.

The land and sea distribution of the earth 66 million years ago.

The land and sea distribution of the earth 66 million years ago.

About 55 million to 50 million years ago, North America and Greenland drifted out of Europe, and the Indian plate began to hit the Asian continent, forming the Qinghai-Tibet Plateau and the Himalayas. The collision between India and Asia is actually only part of a series of continent-to-continent collisions during the closure of the ancient Mediterranean. The collision between all continents from east to west includes: the collision between Spain and France, forming the Pyrenees; The collision of Italy, France and Switzerland formed the Alps; The collision between Greece, Turkey and the Balkans led to the formation of HerLearned and Dinaride. The conflict between Arabia and Iran.

Collision is accompanied by division: since Cenozoic, the land of Australia, which was originally connected with the Antarctic continent, has also begun to drift rapidly northward and hit the Indonesian archipelago in southeast Asia. The stretching activities that took place 20 million years ago have continued to modern times, including: the stretching of the Red Sea caused the Arabian Peninsula to drift to Africa, the stretching system appeared in East Africa, the stretching of the Sea of Japan made Japan move eastward into the Pacific Ocean, and the opening of the Gulf of California made northern Mexico and California move northward together. These activities laid the outline of today's world.

Continental division has nothing to do with climate warming.