When was the ice age?

Release time

March 2002

Ice Age is a fully digital animated film produced by Blue Sky Animation Studio in 2002, released by 20th Century Fox Film Company, and the first film in the Ice Age series, directed by chris wedge and carlos saldanha [

When was the first ice age in history?

In the long geological history, the earth has experienced three periods of continuous temperature decline, which geographers call "ice age". Among them, the Precambrian and Paleozoic ice ages lasted for tens of millions of years, while the Cenozoic ice age lasted for two million years. There is still no definite theory about the origin of the ice age. Some scholars believe that it may be related to the change of the periodic tilt angle of the earth's axis when the earth rotates, which leads to the decrease of sunlight exposure. The occurrence of the ice age is still a mystery of natural science. Although scientists have been quite sure that the changes of the earth's orbit around the sun and its rotation axis are closely related to the occurrence of the ice age, these changes will not change the incident energy of the sun, but only change the distribution of the incident sunlight, which can cause great changes in the climate on the earth, which makes scientists very confused.

About two million years ago, the third ice age "Quaternary Ice Age" in geological history began at the same time, and the temperature around the world began to drop. Europe, North America and Greenland in the mid-latitude region of the northern hemisphere are all covered by large ice sheets extending all the way from the North Pole. During this period, there were five ice ages in Europe and four ice ages in North America and Chinese mainland. As for Taiwan Province Province, only the glaciers of the last ice age have been confirmed, that is, the late Pleistocene from 70,000 to 1 10,000 years ago. Scholars call it the "Snow Mountain Ice Age".

The rising temperature of the North and South Poles caused the melting of the polar ice sheets. You should know that the melting of ice is endothermic, so the rise of the temperature at the poles will correspondingly cause the global temperature imbalance, that is, the temperature will drop.

The last ice age was more than 50 thousand years ago, because the climate of the earth was very sultry at that time, and the land animals all adapted to the perennial high temperature above 40 degrees. Finally, due to the temperature imbalance between the two poles, the global temperature drops, but the drop is not obvious, but for many warm-blooded animals, even if the living environment temperature drops 10 degrees, it is fatal.

By the way, human ancestors passed that period 50,000 years ago because they knew how to use the most basic warm-keeping measures.

Four major ice ages in the world.

The name of foreign ice age: the name of China ice age (ten thousand years) and its geological age.

Kunitz Glacier Poyang Glacier 137- 150 Late Jurassic

M Glacier: Cretaceous in dagu glacier 105- 120.

Lisi Glacier Lushan Glacier 10-32 Tertiary Oligocene

Quaternary update of Dali Glacier1-1in Vurm Glacier.

Who came first in Cretaceous, Ice Age and Triassic?

Ice age:

About 2.4 billion to 2,654.38 billion years ago-the Huron Ice Age.

About 850 million to 635 million years ago-the ice age

About 450 million to 420 million years ago-Ordovician

About 360 million to 260 million years ago-Carboniferous period

About 2.58 million years ago-Quaternary Ice Age

Cretaceous: It started 6.5438+45.5 million years ago and ended 65.5 million years ago, 80 million years ago.

Triassic: Start time: 250 million years ago, duration: about 50 million years.

Sequence: Ice Age-Triassic-Cretaceous.

When will the ice age of the earth come?

A new round of earth ice age is coming.

Xinlang technology

144

Sina Science and Technology News Beijing time 65438+ 10/5 news, according to foreign media reports, the latest research by Russian scientists shows that the global climate will gradually cool in the next few years, and its final development result is likely to be the arrival of a new round of ice age.

Russian scientists said that various evidences, such as ice cores, marine sediment cores, geological records and paleontological population research data, show that there is a regular glacial cycle pattern on the earth, that is, each glacial period lasts about 654.38+0.2 billion years, and the interglacial period is separated by about 654.38+0.2 billion years. Long-term climate data also show that the earth's climate is closely related to three astronomical cycles, collectively known as the "Milankovic cycle". Milankovic period includes three periods: the change of the earth's inclination, the change of the earth's orbit shape and the change of the earth's wobble. According to Milankovic's theory, these three astronomical periods respectively affected the radiation degree of the sun to the earth, and then * * * led to the formation of the ice age and interglacial age of the earth.

The data map of the ice core at the East Antarctic Station shows that the glacial period and interglacial period did appear at annular intervals. According to the data map of Dongfang Station, it can also be seen that the change of carbon dioxide on the earth lags behind the change of earth temperature for about 800 years. So this shows that the change of the earth's temperature precedes the change of carbon dioxide, or the former leads to the change of carbon dioxide, rather than the opposite effect, which is completely different from the greenhouse effect theory. In other words, the increase of carbon dioxide in the atmosphere does not lead to global warming. On the contrary, the natural circulation of global temperature leads to the increase of carbon dioxide. The amount of carbon dioxide will rise or fall with the change of earth temperature, mainly because cold water can hold more carbon dioxide than warm water. Due to the natural circulation of the ice age, the earth is warming now. As the temperature of seawater rises, it will release more carbon dioxide into the atmosphere.

Because the release of carbon dioxide from rising seawater lags behind the change of the earth's temperature, the amount of carbon dioxide on the earth will continue to increase within 800 years after the end of the current interglacial period. 800 years after the earth enters the next ice age, the amount of carbon dioxide will begin to decrease with the decrease of ocean temperature. The data map of the ice core at Dongfang Station shows that in the past 420,000 years, global carbon dioxide has been fluctuating with the ice age cycle. In this natural cycle, the temperature of the earth will reach a peak about every 1 10000 years. About 325,000 years ago, the earth's temperature and carbon dioxide content reached their peak. Now, the earth's temperature has reached its peak again, the interglacial period is coming to an end, and the earth is about to enter the next glacial period. If we are lucky, mankind still has a few years to prepare.

What is the Ice Age?

The ice age, also known as the ice age, refers to the fact that in some years, the land and sea of the earth were covered with ice, and these frozen areas were much wider than the current frozen areas. During the ice age, ice covered most parts of the world, and the climate in these areas was very cold; There is a lot of ice in the ocean, and there is thick ice on the ground. At the same time, because more water is stored in the ice, the sea level is lower everywhere.

In two geological periods called Precambrian (600 million years ago) and the end of Ordovician (about 450 million years ago), ice ages may have appeared several times. In today's Sahara desert, we can still see the remains of the Ordovician ice age-there are large scratches on the stones, which were left by ice passing by. Scientists have determined that there have been eight glacial periods and eight warm periods in the history of the earth.

During the ice age, many places in Europe, North Asia and North America were covered with large areas of ice and snow, and the current ice sheets and ice sheets were left at that time. The movement of ice changed the land. Ice scraped away a large area of rocks, and the scraped stone chips piled up on the edge of the ice, which is moraine. The weather gets warmer, the ice melts, the ice layer narrows, the moraine remains on the ground, and the water flowing from the melted ice layer is taken to other places. Many new lakes and rivers have been formed in mountains and basins that were once covered with ice.

In addition, some scientists predict that the next ice age of the earth will appear as early as 6.5438+0.5 million years later, provided that human activities have no serious impact on the earth during this period.

Ice age refers to the period when Gongdu was covered by surface glaciers in a large area. In the past life history of the earth, ice ages have appeared repeatedly; At least 800,000 years ago, the earth had experienced more than 30 ice ages.

How cold was the earth during the ice age?

In fact, it sounds a bit surprising. During the ice age, the temperature may have dropped by only four or five degrees Celsius in 100,000 years. But note ~ this is only a global "average" figure. With the arrival of the ice age, the polar ice sheet will expand and the distribution of subtropical areas will move to the equator. In some areas, such as coastal areas, due to the regulation of the ocean, or the equatorial region with strong sunshine all the year round, the temperature change may be small; However, in some areas, such as inland, desert areas or other areas with special topography and environment, the temperature drop is very obvious.

Can living things survive?

The temperature drop has changed the flora on the earth's surface, and indirectly or directly changed the living environment of animals, making many animals face extinction or forced migration. Of course, species that can adapt to the changed environment will survive.

When was the last time?

When the ice age came, the temperature gradually decreased. The last ice age occurred about 18000 years ago. According to the research results of scientists, the climate was cold at that time, and about one third of the world's land was covered with 240 meters thick ice.

The earth has an ice age. Is there a "Jehol Age"?

Between the end of the glacial period and the next glacial period, it is the "interglacial period"; The interglacial climate was warm, just like the earth is in the interglacial period now. Apart from the glacial and interglacial periods, there is no third hot period with particularly high temperature.

Ice in the ice age was not directly frozen in the ocean, but the glaciers on the land expanded, and a large amount of ice was stranded on the land, so it was difficult to return to the ocean, and the water body in the ocean decreased, so the sea level dropped.

Four major ice ages in the world.

The name of foreign ice age: the name of China ice age (ten thousand years) and its geological age.

Kunitz Glacier Poyang Glacier 137- 150 Late Jurassic

M Glacier: Cretaceous in dagu glacier 105- 120.

Lisi Glacier Lushan Glacier 10-32 Tertiary Oligocene

Woolm Glacier Dali Glacier 1- 1 1 Quaternary Pleistocene

There is a change period of 400,000 years, but it is not observed. Therefore, geophysicists and meteorologists believe that Kirkeby's cosmic ray theory is controversial, but it is not too crazy and worth studying.

Is the ice age caused by the change of the total amount of cosmic rays (co *** ic rays) that hit the earth? According to research, the influence of cosmic rays is on clouds, which then leads to great changes in the earth's climate. The change of beryllium-10 content in deep-sea sediments was studied. ......

When will the next ice age come?

Don't worry, the ice age is still early. The Ice Age was also the Great Ice Age. At present, the known Great Ice Age has occurred three times in the history of the earth, namely the Sinian Great Ice Age, the Carboniferous-Permian Great Ice Age and the Quaternary Great Ice Age, with an interval of 300 million years. According to this deadline, the next Great Ice Age will not come until 300 million years later, because the last Quaternary Great Ice Age ended less than 20,000 years ago. Even now, human beings will not be extinct, because before the end of the Quaternary Great Ice Age, human ancestors were born, ancient humans could still survive at that time, and I believe that human beings will not be extinct now. Of course, it is certain that billions of people will die.

When is the next ice age?

Russian scientists say that a new round of earth ice age is coming.

According to foreign media reports, the latest research by Russian scientists shows that the global climate will gradually get cold in the next few years, and its final development result is likely to be the arrival of a new ice age.

Russian scientists said that various evidences, such as ice cores, marine sediment cores, geological records and paleontological population research data, show that there is a regular glacial cycle pattern on the earth, that is, each glacial period lasts about 654.38+0.2 billion years, and the interglacial period is separated by about 654.38+0.2 billion years. Long-term climate data also show that the earth's climate is closely related to three astronomical cycles, collectively known as the "Milankovic cycle". Milankovic period includes three periods: the change of the earth's inclination, the change of the earth's orbit shape and the change of the earth's wobble. According to Milankovic's theory, these three astronomical periods respectively affected the radiation degree of the sun to the earth, and then * * * led to the formation of the ice age and interglacial age of the earth.

The data map of the ice core at the East Antarctic Station shows that the glacial period and interglacial period did appear at annular intervals. According to the data map of Dongfang Station, it can also be seen that the change of carbon dioxide on the earth lags behind the change of earth temperature for about 800 years. So this shows that the change of the earth's temperature precedes the change of carbon dioxide, or the former leads to the change of carbon dioxide, rather than the opposite effect, which is completely different from the greenhouse effect theory. In other words, the increase of carbon dioxide in the atmosphere does not lead to global warming. On the contrary, the natural circulation of global temperature leads to the increase of carbon dioxide. The amount of carbon dioxide will rise or fall with the change of earth temperature, mainly because cold water can hold more carbon dioxide than warm water. Due to the natural circulation of the ice age, the earth is warming now. As the temperature of seawater rises, it will release more carbon dioxide into the atmosphere.

Because the release of carbon dioxide from rising seawater lags behind the change of the earth's temperature, the amount of carbon dioxide on the earth will continue to increase within 800 years after the end of the current interglacial period. 800 years after the earth enters the next ice age, the amount of carbon dioxide will begin to decrease with the decrease of ocean temperature. The data map of the ice core at Dongfang Station shows that in the past 420,000 years, global carbon dioxide has been fluctuating with the ice age cycle. In this natural cycle, the temperature of the earth will reach a peak about every 1 10000 years. About 325,000 years ago, the earth's temperature and carbon dioxide content reached their peak. Now, the earth's temperature has reached its peak again, the interglacial period is coming to an end, and the earth is about to enter the next glacial period. If we are lucky, mankind still has a few years to prepare.

Habiburo-Abdul Samatov of the main observatory in Pulkov, Russian Academy of Sciences, said that according to the current changes of solar radiation, the global temperature will inevitably drop during 20 12-20 15, but the process will be slow. In addition, during 2055-2060, there will be a significant global cooling, and this process will last for about 60 years. Abdul Samatov also revealed that a new type of space observation device will be built from next year to monitor global climate change from space. It is reported that the device may be deployed to the International Space Station in 2008. He said, "Now there is no similar high-precision observation instrument in the world. We hope this device can be deployed to the International Space Station by the end of 2008. Starting from 2009, we will use it for systematic observation activities. "

In the long geological history, the earth has experienced three periods of continuous temperature decline, which geographers call "ice ages". Among them, the Precambrian and Paleozoic ice ages lasted for tens of millions of years, while the Cenozoic ice ages lasted for two million years. There is still no definite theory about the origin of the ice age. Some scholars believe that it may be related to the change of the periodic inclination of the earth's axis when the earth rotates, which leads to the decrease of sunlight exposure. The occurrence of the ice age is still a mystery of natural science. Although scientists have been quite sure that the changes of the earth's orbit around the sun and its rotation axis are closely related to the occurrence of the ice age, these changes will not change the incident energy of the sun, but only change the distribution of the incident sunlight, which can cause great changes in the climate on the earth, which makes scientists very confused. About two million years ago, when man first appeared on the earth stage, geology ......

When was the ice age?

This refers to the period when the earth's climate is very cold and large areas at high latitudes are covered by continental glaciers. The last ice age was in the Pleistocene. According to the research results in Europe and North America, it is considered that * * * has six glacial periods and five interglacial periods. According to the analysis of the terrain of Japanese Ice Bucket (kar), it is found that there are two ice ages. The most significant ice age was Carboniferous-Permian, and the remains of glaciers remained in Gondwana. In addition to the above two ice ages, Europe and the United States also have glacial remains of Precambrian, Mesozoic and Tertiary, but they are not very significant.

ice age

In geological history, glaciers have slid across the earth's surface many times, impacting and depicting the land, forming many lakes and swamps. The last ice age occurred about 2 billion years ago. In southern Canada, there are a series of primitive glacial deposits on the ground, stretching 1000 miles from east to west. This earliest Canadian ice sheet is at least 1000 miles long, 1000 miles wide and thousands of feet thick. The latest evidence shows that ice has flowed to the northern United States, at least to Michigan.

Scientists believe that glacial sediments found in South Africa, central India and western Australia belong to the same era as those found in southern Canada. If so, the ice age 2 billion years ago must have been very extensive and lasted for millions of years. Since then, the earth has experienced several ice ages.

In the recent 654.38+0 billion years, the earth has experienced at least six major ice ages, each with an interval of about 654.38+0.5 billion years and each lasting about 50 million years. As for why there is such a periodic ice age, it is a mystery in the history of the earth. Scientists have put forward many theories about this, from the change of ocean currents to the periodic change of sunspots. But no theory is tenable and convincing. Obviously, the glacier phenomenon is caused by many factors, but it seems certain that the earth is still in the ice age.

The term ice age may be a bit vague. Usually this statement refers to the period when parts of the earth were covered by glaciers12 million years. These times are usually marked by a series of glacial advances or interglacial periods (glaciers stop advancing, melting and retreating). However, geologists say that the ice age refers to the period of global cooling, which may last for millions of years. The 50 million years mentioned above are considered as the ice age. Obviously, several ice ages may and do occur in one ice age.

The last ice age began about 65 million years ago, which seems to be related to the Cretaceous extinction. A lot of evidence shows that the earth once collided with a huge comet or asteroid, and the debris of the latter flew into outer space. A large amount of smoke and dust from forest fires caused by collisions permeates the lower atmosphere, blocking sunlight, causing the earth's temperature to drop sharply and producing a large amount of acid rain. In this way, the only remaining dinosaurs became extinct, and three-quarters of the existing animal and plant species became extinct. This collision may have changed the earth's orbit to some extent, which is why the earth always stays in this low temperature state, and there is no indication that the earth may return to a hotter climate suitable for the growth of dinosaurs in Mesozoic.

The beginning of the ice age was a slow process. About 65 million years ago, glaciers began to form in Antarctica. The ice surface is getting bigger and smaller, gradually forming a thick uplift ice sheet. About 20 million years ago, ice covered the entire Antarctic continent, and this process is still going on. About 654.38+02 million years ago, glaciers began to spread and move, covering the mountains of Alaska. During the ice age, Greenland glaciers were relatively young because the continent was not covered by glaciers until about 3 million years ago.

Time has entered a new ice age, which geologists call Pleistocene. About 2 million years ago, a large number of glaciers began to move forward, sometimes covering 1/4 of the earth's land surface, thousands of feet thick. During this last freezing period, the glacier melted at least four times, so it moved forward several times and retreated several times. Now people are beginning to find some evidence that glaciers are always fiercer in the next advance than the previous one. The fiercest one happened about 50,000 years ago and stopped 1 10,000 years ago. Whenever there is an interglacial period, the global climate will get warmer on average, much warmer than it is now. Usually the interglacial period lasts for thousands of years. Even at the peak of the last glacier advance, there were several pauses. ......