The thread subject is the title of an article published in Science Illustrated {Australian: 2019-08-03}, with a lead-in on the front cover of "BRACE for IMPACT! New Discovery: the massive meteor strike that early humans survived" pgs. 32-39
"A meteor with a diameter of 1.5km strikes Greenland with the force of 700 nuclear bombs. The discovery of a huge crater reveals that this meteor strike may have delivered a millennium of cold temperatures for late Stone Age humans" pg. 32
"… our ancestors witnessed it only 13,000 years ago, according to the new discovery of a huge meteor crater under the Greenlandic ice sheet. Scientific studies indicate that the meteor didn’t only destroy the ice sheet and Earth’s crust, it caused dramatic climate change – 1000 years of cold – which wiped out entire peoples, ultimately changing the history of mankind" pg. 34
"Meteor interrupted global defrosting
The ice age was about to end, and temperatures were approaching those of today. But then disaster struck. A huge meteor melted hundreds of cubic kilometres of ice, blocked warm ocean currents, and threw Earth back into the cold" pg. 36
An interesting article on a current topic
BEST!
SlideRule
Links to paper and article in
Science:
Technical paper about Hiawatha Crater
Less technical article in Science
I am slightly confused about the discussion of the energy. The paper gives a mass of about 1.4*10^13 kg, about a sixteenth of Halley's Comet mass, and an impact velocity of 20 km/s, so a kinetic energy of about 2.7*10^21 J, or about 650,000 Mt. The Science article states the energy as 700 Mt. Maybe someone mistook gigatons for megatons?
I hope those findings won't be used to delay the action against the human based climate change that is getting more and more extreme.
(08-27-2019 11:31 AM)SlideRule Wrote: [ -> ]Scientific studies indicate that the meteor didn’t only destroy the ice sheet and Earth’s crust, it caused dramatic climate change – 1000 years of cold – which wiped out entire peoples, ultimately changing the history of mankind" pg. 34
(08-27-2019 08:03 PM)pier4r Wrote: [ -> ]I hope those findings won't be used to delay the action against the human based climate change that is getting more and more extreme.
Um, you mean like suggest dropping an asteroid on Greenland to correct the warming trend? Side effects seem a bit extreme.
(08-28-2019 01:36 AM)mfleming Wrote: [ -> ]Um, you mean like suggest dropping an asteroid on Greenland to correct the warming trend? Side effects seem a bit extreme.
No, although it may be worth a try, especially for the side effects.
I fear that some people would say "see? If the glacier melts the climate change will fix itself! Thus we need to warm the earth more!". Oh whatever, they will say this anyway because otherwise they wouldn't reason as they do.
If a species seriously harm itself directly or indirectly, it is not that intelligent in my view.
(08-28-2019 01:36 AM)mfleming Wrote: [ -> ]Um, you mean like suggest dropping an asteroid on Greenland to correct the warming trend? Side effects seem a bit extreme.
Well if an asteroid is dropped on it, you can forget about the USA buying it. The same goes for Iceland. Maybe we could pick up Greece at a good price.
People make fun of Trump (with good reason!) but the idea of the USA buying Iceland and Greenland didn't start with him. It's been around since the 1800's.
(08-29-2019 01:41 PM)toml_12953 Wrote: [ -> ] (08-28-2019 01:36 AM)mfleming Wrote: [ -> ]Um, you mean like suggest dropping an asteroid on Greenland to correct the warming trend? Side effects seem a bit extreme.
Well if an asteroid is dropped on it, you can forget about the USA buying it. The same goes for Iceland. Maybe we could pick up Greece at a good price.
People make fun of Trump (with good reason!) but the idea of the USA buying Iceland and Greenland didn't start with him. It's been around since the 1800's.
Since you all have this funny idea that the whole world is at your disposal.
:)
(08-29-2019 02:08 PM)Massimo Gnerucci Wrote: [ -> ] (08-29-2019 01:41 PM)toml_12953 Wrote: [ -> ]Well if an asteroid is dropped on it, you can forget about the USA buying it. The same goes for Iceland. Maybe we could pick up Greece at a good price.
People make fun of Trump (with good reason!) but the idea of the USA buying Iceland and Greenland didn't start with him. It's been around since the 1800's.
Since you all have this funny idea that the whole world is at your disposal.
Whoa... not all of us... easy with the generalization there...
(08-29-2019 11:19 PM)rprosperi Wrote: [ -> ] (08-29-2019 02:08 PM)Massimo Gnerucci Wrote: [ -> ]Since you all have this funny idea that the whole world is at your disposal.
Whoa... not all of us... easy with the generalization there...
Well, let't not forget that the original London Bridge now sits in a theme park in the middle of Arizona. Never underestimate an American with too much money for his own good
(08-29-2019 11:19 PM)rprosperi Wrote: [ -> ] (08-29-2019 02:08 PM)Massimo Gnerucci Wrote: [ -> ]Since you all have this funny idea that the whole world is at your disposal.
:)
Whoa... not all of us... easy with the generalization there...
'You all' to not explicitly target TomL as the recipient...
everettr, thanks for sharing the links.
Parallels between the climate change caused by the meteor impact or caused by global warming could be drawn. According to the article the Pleistocene ice age has been caused by the meteor impact melting the ice sheet, masses of fresh water flowing into the Labrador sea and disrupting ocean currents.
A similar scenario could arise when global warming affects arctic and Greenland ice sheets.
So we shouldn't worry about hot summers and buy more fur coats instead? Sadly this butterfly effect behaviour of nature can't be calculated neither with a 15c nor Prime or Deep Thought
Patrick