The global warming makes the next ice age slow

According to in-depth research on climate change on the Arctic, people are extending the time to the next ice age.

The Arctic is now warming more than 2,000 years ago - a trend that goes against the natural cold cycle caused by oscillations of the Earth axis.

Previously, researchers have looked at the temperature data of the Arctic over the past 400 years.

The above study shows that the temperature in the 20th century saw a sharp increase, but it is unclear what causes people to emit greenhouse gases or due to natural tendencies, co-author Gifford Miller from the Institute Andrew and Arctic of the University of Colorado, Bolder, said.

Looking further into the past, Miller 's latest research with colleagues reveals that sudden warming in the 20th century actually broke the cold cycle that has been going on for many thousands of years.

'Clearly, the most plausible explanation for that overturning is that the amount of greenhouse gases increases,' Miller said.
Researchers' climate models perfectly match field data such as sediment cores or age rings on stems.

In the end, the Earth will enter the new cyclical period anyway, Miller added, but perhaps many more thousands of years will take place.

The ice age was interrupted

The Earth's tilt relative to the sun varies with natural fluctuations lasting 26,000 years, causing our planet to rotate around its axis as an unstable spin.

This oscillation causes the Earth to approach the Sun most in different months for a long time.Over the past 7,000 years, Earth has often reached the closest distance to the sun in January every year.

This means that in the summer there is less sunlight to reach the Arctic, so this area will become colder.

To estimate past temperatures, the team surveyed Arctic lake bottom sediments and previously published data on glacier ice cores as well as age rings on the trunk.

The team also surveyed a global climate computer model located at the National Climate Research Center in Colorado.

Miller and his colleagues found that fluctuations in the Earth's tilt caused the Arctic temperature to drop by about 0.20C in every 10,000 years of the cold period.

But in the mid-1990s, human warming effects overwhelmed the cold cycle, causing temperatures to rise to 1.40C in several decades.

(Photo: Nationalgeographic.com)

The results of the study will be published tomorrow in Science, 4 of the 5 decades with the highest temperatures in the past 2,000 years that have appeared since 1950.

Ecologist Syndonia Bret-Harte directly saw the effects of climate change in her research on the Alaska tundra.

The new study this time "is not surprising, confirming only the previous statements of scientists, ' Bret-Harte, officer of the University of Alaska Biological Research Institute of Fairbanks, said. .

Amplifying the phenomenon of global warming

The effects of climate change are being amplified at the Arctic, where the warming process is more rapid than anywhere else on Earth.

That's because the Arctic temperature is strongly affected by summer ice melt as well as permafrost, experts say.

The Arctic sea ice has reached a record low in 2007 and will probably completely disappear by 2030.

Without the white bands that radiate sunlight back into the air, these sun rays will be absorbed into the depths of the ocean - which makes the warming process faster.

And the melting of permafrost has begun to release carbon dioxide and methane, the two most dangerous greenhouse gases ever buried underground.

'Obviously this amplification process will continue in the future. There will be direct effects in the Arctic, ' Miller said.

'The biggest problem is, when the ice is melted, the sea level will rise - this is a global problem, and it will cause serious impacts.'

Bret-Harte agrees that the amplification effects will 'continue until the summer sea ice disappears completely - there is no way to change this trend in the short term.'
But that does not mean that people should stand and watch, she said.

'We are considering a warming world, and there are two questions: how will we adapt to that process and reduce the pace of climate change? The faster the process takes place, the harder it is for people to find ways to adapt. '