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If we condensed Earth’s 4.6-billion year history into one calendar year, humans evolved in the very last hour of December 31 – and the Industrial Revolution and modern age occurred the last two seconds of that year.

During those two short seconds, we managed to affect Earth’s climate for tens of thousands of years. So much so that we essentially cancelled the next ice age, new research shows.

It means that we’ve not just altered today’s climate, but that we’re also changing the distant future of the Earth with potentially dire consequences. For the next 100,000 years, to be exact.

Why Humans Need Another Ice Age

As humans, we usually have difficulty paying attention to anything that’s five or 10 years away – much less 50,000 or 100,000 years.

But those millennias matter. Without the last ice age, we wouldn’t have the beautiful landscapes, rivers and lakes found in our northern-most regions. Nor would we have the fertile soil that we rely on for agriculture.

Beyond aesthetics and food production, the major concern over a skipped ice age is that humans have now so profoundly altered the future of the Earth that we’re affecting the lives of thousands of generations ahead of us.

Andrey Ganopolski, the study’s lead author, called it “mind-boggling that humankind is able to interfere with a mechanism that shaped the world as we know it.”

How Ice Ages are Usually Formed

Ice ages often begin when there is less sunlight in the Northern Hemisphere during summer, causing less ice to melt and more ice to accumulate – which, in turn, causes more sunlight to be reflected, and so on.

These changes in sunlight depend on the shape of the Earth’s orbit around the sun, the angle of tilt of the Earth on its axis, and whether the tilt of the Earth is pointing toward or away from the sun – all of which vary on different timescales of tens of thousands of years.

When the conditions align in favor of a colder Northern Hemisphere summer, glaciers grow.

How We Put the Next Ice Age on Hold

With the burning of fossil fuels over the last couple of centuries, however, we’ve added so much extra carbon dioxide to the atmosphere that the excess warming will outweigh the slight changes in sunlight that would have otherwise triggered the next ice age.

Humans have now so profoundly altered the future of the Earth, that we’re affecting the lives of thousands of generations ahead of us.

Although the next ice age isn’t due for another 50,000 years from now, a considerable amount of the carbon dioxide that we’ve emitted already, and will continue to emit, will still be in the atmosphere thousands of years from now.

The study published in Nature thus concludes it’s extremely unlikely that an ice age will form at all within the next 100,000 years.

Focus on Today

It’s unclear what skipping an ice age will mean for our planet long-term. What we do know is that climate change is here and already causing irreversible damage.

But just like we have the power to interfere with an ice age, we can curb greenhouse gas emissions and gradually see them decline.

For the first time, there’s now a global consensus that action must be taken to limit the worst of climate change.

That’s where our focus is, and should be today.

This article originally appeared on the EDF Voices blog and is reprinted with permission.

 



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9 comments on “Human Emissions Just Cancelled the Next Ice Age. Here’s Why We Should Care”

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Everett Mack
4 Months Ago

Sorry, but you cannot prevent the apocalypse that is coming. Perhaps some of you can survive if you are wise enough though. :)


Reply
Everett Mack
4 Months Ago

Sorry, but you cannot prevent the apocalypse that is coming. Perhaps some of you can survive if you are wise enough though. :)


Reply
Vita Searle
4 Months Ago

We get more oxygen from algae, it also cleans the air, so we need to protect the quality of the seas. A French/Dutch firm set up an algae tube system in Switzerland at a busy highway, to demonstrate how they can draw in polluted air and clean it up.


Reply
'Bill Johnson
4 Months Ago

Know body blames the Dinosaurs for shitting on this earth for millions of years and for the fossil fuels they left us. the only thing that has killed life on this earth are impacts and the great flood which was probable an inpact


Reply
Asa Yusuke Urameshi
4 Months Ago

Hemp hemp hemp hemp hemp hemp hemp hemp hemp hemp hemp hemp fuck everyone should plant hemp freely it loves de carbon dioxide it'll eat it the fuck up. Plus it can be used for every industrial need.. And can replace just about everything them corporates have over us like a dog on a leash. Nothings impossible IF YOU TRY


Reply
Trinity Clairvoyance Brown
19 Feb 2016

Aman!

Badea Cris
4 Months Ago

we build too much and we dont have forests and nature.


Reply
N S Guru Rajan
4 Months Ago

Do not give up hope. Still we have time. Only thing is...the ice age will be bit delayed.


Reply
Terry Alan Gatlin
4 Months Ago

You are wrong about the future. An ice age is coming. It's Justice. Just ice.


Reply


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