xkcd: Greenhouse Effect


Category:  News & Politics

Via:  outis  •  4 weeks ago  •  7 comments

By:   xkcd

xkcd: Greenhouse Effect


jrDiscussion - desc
Freshman Expert
1  seeder  Outis    4 weeks ago

We've only known about global warming for 128 years. 

Gotta give us time to assimilate the notion.

Then maybe we'll react...

Greg Jones
Professor Guide
2  Greg Jones    4 weeks ago

Well, the planet has been through all kinds of extreme conditions during its long history, but it has recovered nicely and here we are!

Mother Earth seems to have capacity to recover from these events over long periods of time. However, there is no guarantee that life as we know it today, human, animal, aquatic, and plants, might survive another extinction event. But enough genera and species did reemerge each time to continue to evolve and multiply. In addition to climate change we need to be cognizant of other bad things that could happen, like CME's from the sun, gamma ray bursts and large asteroids from space, or an EMP attack from an enemy.

There's been a "Snowball Earth" and a "Hothouse Earth" that has left evidence of their passing showing a wild history of our home planet. 

The story of Snowball Earth (astronomy.com)

Paleocene-Eocene Thermal Maximum (PETM) | Britannica


Freshman Expert
2.1  seeder  Outis  replied to  Greg Jones @2    4 weeks ago

There have been several extinction events. The planet survives, of course.

The creatures living there do not survive. That's the definition of "extinction event".

Greg Jones
Professor Guide
2.1.1  Greg Jones  replied to  Outis @2.1    4 weeks ago

Actually, some did survive each time, or otherwise we wouldn't be here.

Freshman Expert
2.1.2  seeder  Outis  replied to  Greg Jones @2.1.1    3 weeks ago

The  definition of "extinction event" is 85% of species extinguished.

charger 383
Professor Silent
3  charger 383    4 weeks ago

Overpopulation is the cause. I have said that here many times. 

Freshman Silent
4  bccrane    4 weeks ago

The current "climate change" is just the prelude to the next ice age.  In order for an ice age to begin you need enough energy built up in the oceans and enough sea level rise, which is what happens before every ice age and that sea level rise is higher than it is now, to move the energy into the colder latitudes increasing the precipitation to the point that more falls and freezes in, even the summer rains, during the winters than what the next summer can melt.

Graphic: The relentless rise of carbon dioxide


NASA's own chart shows that CO2 rises before every ice age as the glaciers, permafrost, and ice sheets melt releasing CO2 and then the forming ice sheets and glaciers capture the CO2 again and then the permafrost after the ice age captures some also, but as the permafrost is capturing some the ice sheets and glaciers are already in retreat adding to the seas to start the cycle over again.  The chart shows we are due for another ice age and it also shows that increasing CO2 levels isn't the cause of global warming it is because of global warming from the water cycle.


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