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Ancient Supervolcano Affected the Ends of the Earth
LiveScience ^ | November 5, 2012 | Staff

Posted on 11/08/2012 6:20:32 PM PST by SunkenCiv

About 74,000 years ago, the Toba volcano on the Indonesian island of Sumatra erupted with catastrophic force. Estimated to be 5,000 times larger than the 1980 eruption of Mount St. Helens, it is believed to be the largest volcanic event on Earth in the last 2 million years.

Toba spewed enough lava to build two Mount Everests, it produced huge clouds of ash that blocked sunlight for years, and it the left behind a crater 31 miles (50 kilometers) across. The volcano even sent enough sulphuric acid into the atmosphere to create acid rain downpours in the Earth's polar regions, which researchers have found evidence of in deep ice cores.

"We have now traced this acid rain in the ice caps on Greenland and Antarctica," glaciologist Anders Svensson, of the Niels Bohr Institute at the University of Copenhagen, said in a statement.

"We have long had an idea of at what depth the Toba eruption could be found in the Greenland ice cap, but we found no ash, so we could not be sure," Svensson added. "But now we have found the same series of acid layers from Toba in the Greenland ice sheet and in the ice cap in Antarctica. We have counted the annual layers between acid peaks in ice cores from the two ice caps and it fits together."

...The study is detailed in the journal Climate of the Past.

(Excerpt) Read more at livescience.com ...


TOPICS: Astronomy; Science
KEYWORDS: catastrophism; godsgravesglyphs; toba
Sumatra, Earth's sixth-largest island, spied from space. CREDIT: NASA.

Ancient Supervolcano Affected the Ends of the Earth

1 posted on 11/08/2012 6:20:39 PM PST by SunkenCiv
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To: SunkenCiv

Are you trying to cheer me up?


2 posted on 11/08/2012 6:21:43 PM PST by Vince Ferrer
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To: SunkenCiv

“However, there is wide disagreement about how early human were affected and whether large parts of the population were wiped out by the blast.”

Aren’t there theories that Toba wiped out all but about 12,000 of the human population of the planet?


3 posted on 11/08/2012 6:25:26 PM PST by Rebelbase (The most transparent administration ever is clear as mud.)
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4 posted on 11/08/2012 6:25:55 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

Has anyone informed Al Gore about this?
Oh ... I remember, it’s all George Bush’s fault.


5 posted on 11/08/2012 6:27:44 PM PST by donhunt (Certified and proud "Son of a Bitch".)
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To: Vince Ferrer

Not only this — too much www-ing causes hair to grow on the hands.


6 posted on 11/08/2012 6:29:05 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: Rebelbase

There’s some groundless speculation to that effect. :’)


7 posted on 11/08/2012 6:29:41 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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Supervolcano Rained Acid on Both Poles -- But Wasn't So Bad After All?
by James Owen

National Geographic News
November 7, 2012
Scientists have long debated just how extensive and enduring those effects were. One study, for example suggested the Toba blast spawned a thousand-year ice age that only some 10,000 individuals survived. Another has found evidence of humans thriving in relatively nearby India shortly after the eruption.

The new study -- based on acid rain-tainted ice cores from Antarctica and Greenland -- suggests Toba's fallout wasn't quite as catastrophic as might be expected.

The Antarctic ice core, for example, even bears traces of a warming event just after the Toba eruption -- contrary to a strong cooling signal seen in the Greenland cores.

"That means there's no long-term global cooling caused by the eruption," study co-author Anders Svensson said. If there had been, you'd expect to see evidence of a chill at both Poles.

In fact, the post-Toba Antarctic cooling spike looks well, relatively ordinary. "There may have been shorter [global] cooling of a duration of maybe 10 or 20 years, like we see for more recent" -- and much less powerful -- "volcanoes," said Svensson, of the Niels Bohr Institute's Centre for Ice and Climate in Copenhagen.

8 posted on 11/08/2012 6:31:14 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv
Algore says it's Bush's fault.

FMCDH(BITS)

9 posted on 11/08/2012 6:31:26 PM PST by nothingnew (I fear for my Republic due to marxist influence in our government. Open eyes/see)
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Scientists Debate Toba Super-Eruption 74,000 Years Ago -- Did It Lead to Near Extinction of Homo-Sapiens?
dr burke
Daily Galaxy
November 08, 2012
Now, a new study published in the journal Climate of the Past based on acid rain-tainted ice cores from Antarctica and Greenland, suggests Toba's wasn't effect quite as catastrophic as might be expected. The Antarctic ice core shows traces of a warming event soon after the Toba eruption in contrast to vivid cooling signs found in the Greenland ice cores.

"That means there's no long-term global cooling caused by the eruption," study co-author Anders Svensson of the Niels Bohr Institute's Centre for Ice and Climate in Copenhagen said. If there had been, you'd expect to see evidence of a chill at both Poles. There may have been shorter cooling of a duration of maybe 10 or 20 years, like we see for more recent and much less powerful volcanoes."

10 posted on 11/08/2012 6:31:51 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: 75thOVI; agrace; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; ...
Thanks Renfield.



11 posted on 11/08/2012 6:32:29 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

Call me nully furrypaws...


12 posted on 11/08/2012 6:36:05 PM PST by null and void (Day 1388 of the Obama hostage crisis - Barack Hussein Obama an enemy BOTH foreign AND domestic)
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To: SunkenCiv

Paging Al Gore, Mr. Al Gore, please pick up the white courtesy phone you have an important message from Current TV.


13 posted on 11/08/2012 6:56:25 PM PST by 23 Everest (When seconds count. The police are just 23 minutes away. 831 Bonnie)
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To: null and void

I think Brian Williams on NBC has a segment on internet abuse and how you can tell if your a victim? AUSM? (are you sh!tting me?)


14 posted on 11/08/2012 6:58:40 PM PST by 23 Everest (When seconds count. The police are just 23 minutes away. 831 Bonnie)
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To: 23 Everest
Let me guess, the diagnostic symptom is believing anything you didn't hear from the OMG?

Obama Media Group

15 posted on 11/08/2012 7:05:28 PM PST by null and void (Day 1388 of the Obama hostage crisis - Barack Hussein Obama an enemy BOTH foreign AND domestic)
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To: SunkenCiv
The current Ice Age currently breaks down into two broad climate types ~ (1) lots more ice for 100,000 years. Toba occurred when there was lots more ice than presently, and (2) less ice for a period of 10,000 years or more. We are in an interglacial that's been around for 14,000 years.

There are shorter warm spells in the midst of the icy periods ~ Toba might well have occurred during such a period, or could have influenced it in some way.

16 posted on 11/08/2012 7:10:08 PM PST by muawiyah
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To: null and void

Ha Ha, right you are!


17 posted on 11/08/2012 7:10:32 PM PST by 23 Everest (When seconds count. The police are just 23 minutes away. 831 Bonnie)
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To: SunkenCiv

I would personally like to view the photo’s, charts & graphs from this event that happened, per the article, 74,000 years ago. Just for comparisons doctor!


18 posted on 11/08/2012 7:12:48 PM PST by 23 Everest (When seconds count. The police are just 23 minutes away. 831 Bonnie)
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To: SunkenCiv

“That Supervolcano was the result of the TEA PARTY, Bush and the Republicans in Congress,” Obama said today!!


19 posted on 11/08/2012 7:15:18 PM PST by ExCTCitizen (Conservatives needs to listen to the people...Social issues lost votes for the GOP)
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To: Rebelbase

“Aren’t there theories that Toba wiped out all but about 12,000 of the human population of the planet?”

This (74,000 years ago) predates human existance by about 68,000 years...how could there be 12,000 of the human population as survivors? :)


20 posted on 11/08/2012 7:29:09 PM PST by GGpaX4DumpedTea (I am a Tea Party descendant...steeped in the Constitutional Republic given to us by the Founders.)
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To: donhunt; nothingnew
Image and video hosting by TinyPic "We need to put America on the road to green energy in order to offset this volcanic carbon!!"

21 posted on 11/08/2012 7:42:47 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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http://files.abovetopsecret.com/files/8529ab902f91d85d.pdf
22 posted on 11/08/2012 7:54:25 PM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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To: SunkenCiv

Great thread! Thanks!


23 posted on 11/08/2012 8:02:23 PM PST by Graewoulf ((Traitor John Roberts' Obama"care" violates Sherman Anti-Trust Law, AND the U.S. Constitution.))
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To: SunkenCiv

That’s anice big round hole in the lower right. Is that the volcano, asteroid hit, fishing pond?


24 posted on 11/08/2012 8:04:18 PM PST by CodeToad (Padme: "So this is how liberty dies... with thunderous applause.")
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To: donhunt

LOL. Boy are you right! In fact, it wouldn’t surprise me if they name a fault after GW.


25 posted on 11/08/2012 9:10:18 PM PST by DallasDeb
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To: Rebelbase; SunkenCiv; All

Yes, there are such theories. Also, the crater left by Toba is about 16 by 65 miles.


26 posted on 11/08/2012 10:26:48 PM PST by gleeaikin
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To: SunkenCiv

I’m no scientist, so feel free to chime in here, but... wouldn’t this have caused the sort of “nuclear winter” they’re always talking about with reference to a nuclear war - the clouds eliminating all sunlight until all the plants died and so on?

I mean, so why wasn’t everything extinct after this?


27 posted on 11/09/2012 4:01:03 AM PST by Jack Hammer
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To: Jack Hammer

We WERE extinct.

But we got better.


28 posted on 11/09/2012 4:18:59 AM PST by Larry Lucido
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To: Jack Hammer

That’s a good point — the fact that it didn’t have that kind of effect goes to show just how pipsqueakish ALL volcanic eruptions are compared with impacts by large pieces of space debris. It’s remarkable how mealy-mouthed this is carried out — oh, the Chicxulub impact didn’t do anything *because dinosaurs were already in the _process_ of going extinct* (emphasis on stuff that makes no sense, more emphasis on stuff that really makes no sense), but this big eruption field called the Deccan Traps caused the mass extinction. Meanwhile this 70K year old supereruption caused the (entirely imaginary) genetic bottleneck in the human species, and only them, and we know its exact extent, era, and duration. Ridiculous.


29 posted on 11/10/2012 6:00:40 AM PST by SunkenCiv (https://secure.freerepublic.com/donate/)
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