Originally posted by purclecowhttp://www.nature.com/nsu/020819/020819-9.html
I found the film ironic as the fact is simply that we should be entering an ice age now anyway due to the cycle of ice ages every 10000 years, and the only reason we are not----->global warming!
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Next ice age on ice?
Another big freeze might never happen.
23 August 2002
PHILIP BALL
The Larsen Ice Shelf ice sheet retreating from 1993 - 2000. © NOAA/NASA
movie
Mankind could lock the world into an irreversible greenhouse effect, banishing future ice ages, warn two Belgian scientists. Global warming caused by emissions of carbon dioxide and other gases could tip the Earth into a completely new climate state in which cycles of freezing and thawing are switched off, they suggest1.
The notion that we're due another ice age is still occasionally peddled as a reason not to worry about global warming. But just about all the predictions made today are very different to those when this idea was hatched 30 years ago, point out André Berger and Marie-France Loutre of the Catholic University of Louvain.
Back then, climatologists agreed that, because the previous two warm spells between ice ages had lasted about 10,000 years, the present one, the Holocene, should be over soon. It started more than 10,000 years ago.
But we now know that today's conditions are not like those of the last warm period, the Eemian, which was around 125,000 years ago. The ice-age cycle is caused by slow, periodic changes in the shape and position of the Earth's orbit around the Sun. This time around, those changes are less pronounced than they were during the Eemian.
On such grounds alone, scientists have predicted since the 1980s that the present interglacial period might last up to 70,000 years.
On top of that, the amount of carbon dioxide in the atmosphere today is already almost one-third more than during any recent interglacial. Over the next two centuries, it could rise to double the present-day value.
Some climate models that take this into account predict that peak ice-age conditions might return in around 100,000 years' time. But the outcome could be even more dramatic than that, say Berger and Loutre. If the Greenland and West Antarctic ice sheets were to melt completely, an ice age might not get underway at all.
It is hard to know how ice sheets will act in a changing climate.
© NASA/GSFC
Although ice ages are ultimately caused by orbital changes, they seem to rely on feedbacks within the Earth's climate system. The ice sheets provide such a feedback - the bigger they get, the more sunlight and heat they reflect, and so the more the Earth cools.
It is hard to know what the ice sheets will do, says climatologist Thomas Crowley of Duke University in Durham, North Carolina. He thinks that the ice in Antarctica is very unlikely to disappear. Long after we've burnt up all the fossil fuels, "there should still be a pretty big chunk of ice down there", he says. The Greenland ice sheet might be more susceptible, but possibly not enough to rule out an eventual return to ice-age conditions.
Perhaps, says Crowley, the ice-cycle will merely "skip a beat" this time round.
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Originally posted by StarValleyWythe film didn't inspire ME to feel anything...that is my point ...it was just a film I watched to kill a couple of hours with some friends. I'm obviously missing your point in a big way. what was the agenda it was made with? 🙁
Nice try. It is not only a film. It is propaganda. Big difference. It was made with an agenda, released to a purpose and paid for by ideologues. That is not my definition of anything but propaganda.
<edit> Sorry. Almost ignored your question. No... it is not a good thing to get people to "thinking about the environment and global warming". Because. ...[text shortened]... movie inspired in you... even though the cause of the feelings is a total lie. Think about that.
Originally posted by wucky3Humans are killing the earth. We are causing global warming by being alive I guess. Hell, I don't know. I never have figured out the point of those who try to tell us to give up civilization.
the film didn't inspire ME to feel anything...that is my point ...it was just a film I watched to kill a couple of hours with some friends. I'm obviously missing your point in a big way. what was the agenda it was made with? 🙁
There is little or no proof that there is such a thing as "global warming" yet everyone believes that it exists. Why? You tell me. Why do you believe it? Have you ever done a study or ran an experiment or researched data on the subject?
Why then does most of the people on earth believe in it?
I don't know. For the life of me. As near as I can tell, the earth has always... for the last three billion years swung between + or - 35 Degrees F. average temperature to what it is at the current time. Man has only been around for a few thousand years. Who's to know? Maybe we do cause it. Maybe we don't. That is the point. We will never know if the issue becomes lost in propaganda. Will we?
Originally posted by flexmoreYou make me wish that it could all be as you state. What would we lose?
http://www.nature.com/nsu/020819/020819-9.html
"
Next ice age on ice?
Another big freeze might never happen.
23 August 2002
PHILIP BALL
The Larsen Ice Shelf ice sheet retreating from 1993 - 2000. © NOAA/NASA
movie
Mankind could lock the world into an irreversible greenhouse effect, banishing future ice ages, warn two Belgian scienti ...[text shortened]... .
Perhaps, says Crowley, the ice-cycle will merely "skip a beat" this time round.
"
Have you noticed that the southern ice cap is being melted by volcano's? Just like has happened a dozen times before? Are you aware that the newest major volcano we know of (a mere 10,000 years old) is melting away under the very ice cap you mention? No? That is my point. Nobody seems to actually read or study anything. Just whatever propaganda they see first becomes dogma. Oh well.
Originally posted by shavixmirEuropean competition of some sort? Or maybe in the not-so-distant future, Celtic and Rangers will have joined the English league. 😉
Oh. One wee thing I should mention....what on earth were Manchester United doing playing Celtic?
Did I miss something?
LOL. Now I really have to watch this film.
Originally posted by flexmoresorry, took a while to remember about this,
can you please expand on this ??????
i say this as once upon a lifetime i studied geology which is the study of the earth and the earths history at advanced level. and my teacher taught me along with many others that there is an ice age cycle that looks very much to all intensive purposes like a mathmatical sine curve, every 10,000 years throughout the earth history there has been an ice age and that is what effects many things to this day such as rising and falling of land such as scotland and the south end of england. now, the ice ages repeat as a pattern just like the magnetic poles flip every so many 1000's of years of which has happened throughout the earths history 100's of times which can be proved.
Now these thing run in patterns due to how the earth works and currently due to how many years have passed and the pattern formed throughout history shows that we should be entering the first stages of an ice age though we obviously are not. This has been discussed as to why we have not by many geologists and scientists as te pattern is quite precise and is the way the earth remains in equilibrium in its environment and such things to the ratio of oxygen isotopes such as o12 and o14 that are produced by different types of plants. A theory that was most plausible was put forward that infact global warming is prevent the temperature from dropping and infact interupting the ice age curve to cause it to rise at its peak more than it should. the theory is that global warming will continue to prevent this from happening until such tim fuel runs out and the greenhouse gasses decrease and by that time the earth will take control and regulate itself to control its environment, i.e producing an ice age that comes on rapidly to bring the curve back inline, though of course it will not come on as rapid as that film.
That was a very interesting thing that stuck in my mind from a very interesting subject that i did aswell as a few other stuff. one day i intend to carry on to do a degree in the subjectbut the sea calls to my heart more at the moment.
🙂
Originally posted by purclecowMiss Purple Cow,
sorry, took a while to remember about this,
i say this as once upon a lifetime i studied geology which is the study of the earth and the earths history at advanced level. and my teacher taught me along with many others that there is an ice age cycle that looks very much to all intensive purposes like a mathmatical sine curve, every 10,000 years throughout ...[text shortened]... d to carry on to do a degree in the subjectbut the sea calls to my heart more at the moment.
🙂
you have expanded on a different part of your comment from which i was requesting in my question.
i asked you to expand on your knowledge of the ocean circulation.
instead you expanded on your knowledge of the ice age cycle - i think you should contact your teacher about that ice-age-cycle, the new theory seems to destroy that old one.
:-)
Originally posted by flexmoreoh you were asking about ocean circulation.....well a geology teacher only deals with history and oceanography in the respects of the sea bed and ocean rock. i have to sleep now and give my poorly hand a rest as i am not supposed to be moving my fingers on it...but i will reply later on some time on the matter on ocean circulation...but the north atlantic current is not the first current that melting will cause a problem with......the Gulf stream is a big problem if it redirects due to melting of ice caps. ocean currents don't just disappear...they redirect due due to several forces that cause them.anyway my fingers on my writting hand are now bleeding so i shall write more later.
Miss Purple Cow,
you have expanded on a different part of your comment from which i was requesting in my question.
i asked you to expand on your knowledge of the ocean circulation.
instead you expanded on your knowledge of the ice age cycle - i think you should contact your teacher about that ice-age-cycle, the new theory seems to destroy that old one.
:-)