Its fascinating to think of an ice world 400 million years before the rise of the dinos.
-----Original Message----- From: LizR <[email protected]> To: everything-list <[email protected]> Sent: Wed, Mar 12, 2014 5:34 pm Subject: Re: The situation at Fukushima appears to be deteriorating Snowball earth appears to have been due to a feedback loop (once you glaciate a significant amount of the planet, the rest follows). I don't know what the trigger was, however. A supervolcano is possible, blocking sunlight over a long enough period. On 13 March 2014 05:56, John Clark <[email protected]> wrote: On Tue, Mar 11, 2014 at 2:17 PM, <[email protected]> wrote: >>> I think on the scale of 4 billion years the sort of margin we're talking >>> about is that necessary to keep water liquid on the surface. >> At least twice in the last 4 billion years water WAS kept below the freezing >> point at the surface, from the pole continuously to the equator and we had >> a snowball Earth. It happened once about 1.5 billion years ago and again >> about 700 million years ago; why it happened and once it did how things ever >> warmed up again is not well understood, just like most things in climate >> science. > I knew you'd say that. So what if there are two periods or more when liquid > water wasn't free running. Does that alter the fact that liquid water has > been *roughly* in situ over billion years while the sun warmed 20%? Do you > actually dispute that this is something that needs explaining? No and I don't claim to know all the answers, I'd like to know why the Earth turned into a snowball from pole to equator .7 billion years ago but from 1.5 to .7 billion, when our star was even weaker, it did not and despite a weaker sun things were much warmer. Apparently the climate machine is a bit more complicated than what some would have us believe. > Several posts up, you obviously did not know about the sun warming issue. BULLSHIT! I would be willing to bet money that I know more about the evolution of stars, both on and off the main sequence, than you do, and probably one hell of a lot more. >>> You keep throwing out eratic graphs....you do know they are provided by >>> climate science? >> So you think climate scientists are putting out "eratic graphs" but >> nevertheless based on what they say you think the human race should be >> forced to be put on a starvation energy budget that will impoverish the >> world and kill billions of people. And this is the moral high ground? > I don't know what the fuck you are talking about. That's a pity because you're the one who said climate science are producing "eratic graphs". > They are doing science. The discussion about what needs to happen is a > separate matter. Yes, and the question about what has happened is a separate matter from what will happen, and one question is far far more difficult to answer than the other because the past is always clearer than the future. > Fuck off I love you too. John K Clark -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
