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Post by Andrew on Feb 14, 2016 11:58:49 GMT
Andrew, I think you missed the point. Amongst a large number of other factors, we only exist because our planet is comparatively stable orbitwise, thanks to the moon, and the local star does not generally misbehave.
Otherwise advanced life on earth would have been snuffed out long ago. Iceball or near heat death, with little time for allegedly intelligent beings to develop.
I think my belief is rational.You are saying nothing could have happened in the last 400 million years to have caused the Suns energy received at the outer atmosphere of the Earth to have 'temporarily' changed by 4%. I have not considered it before now but for example did we always have the same number of planets?
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Post by acidohm on Feb 14, 2016 12:31:43 GMT
:-( :-( :-( :-( :-( :-( :-( :-( :-(
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Post by douglavers on Feb 14, 2016 21:24:00 GMT
A fall in TSI of 4% would have represented an enormous change in energy received by our planet. Every square kilometer of the earth's solar profile would have had its heat input reduced by about 50,000 kilowatts during the day. [about 50 watts per square metre]
I think our planet would have turned into an iceball.
I am reasonably confident that the number of planets has remained the same for the last billion years, not including planetary definition changes!!
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Post by Andrew on Feb 14, 2016 22:03:14 GMT
A fall in TSI of 4% would have represented an enormous change in energy received by our planet. Every square kilometer of the earth's solar profile would have had its heat input reduced by about 50,000 kilowatts during the day. [about 50 watts per square metre] I think our planet would have turned into an iceball. I am reasonably confident that the number of planets has remained the same for the last billion years, not including planetary definition changes!! Who came up with the 4% anyway? I was just thinking of events that could cause a mass extinction via an extreme global cooling
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Post by sigurdur on Feb 15, 2016 1:43:18 GMT
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Post by douglavers on Feb 17, 2016 9:39:03 GMT
weather.unisys.com/surface/sst_anom.gifLooking at the above chart, the single most extraordinary feature, in my view, is the enormous band of anomalously cold water all around Antarctica. Any views as to cause?
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Post by acidohm on Feb 17, 2016 10:21:08 GMT
weather.unisys.com/surface/sst_anom.gifLooking at the above chart, the single most extraordinary feature, in my view, is the enormous band of anomalously cold water all around Antarctica. Any views as to cause? What we could do with is some idea what temperature at salinity is like at various depths......Missouriboy???
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Post by nautonnier on Feb 17, 2016 11:46:47 GMT
weather.unisys.com/surface/sst_anom.gifLooking at the above chart, the single most extraordinary feature, in my view, is the enormous band of anomalously cold water all around Antarctica. Any views as to cause? Remember too that this is late summer in Antarctica. If the anomalous cold continues into their winter it would support Theo's thoughts for what will happen next year.
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Post by nonentropic on Feb 20, 2016 19:32:04 GMT
so now we can also be alarmed by natural processes.
the number of unusual weather or environmental events is proportional to the number of observers.
is there a PhD in this for an observer of observers.
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Post by acidohm on Feb 20, 2016 20:02:32 GMT
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Post by graywolf on Feb 22, 2016 9:45:48 GMT
weather.unisys.com/surface/sst_anom.gifLooking at the above chart, the single most extraordinary feature, in my view, is the enormous band of anomalously cold water all around Antarctica. Any views as to cause? Remember too that this is late summer in Antarctica. If the anomalous cold continues into their winter it would support Theo's thoughts for what will happen next year. Just popped open the link and we seem to have a lot of positive anoms hard up against the coast there? As for 'cold' well you can see just how much ice has melted over the season so i'd imagine a cold skim of fresh melt water messes with the plots this time of year? As with the Arctic this 'skim' of cold/fresh helps refreeze.
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Post by douglavers on Feb 22, 2016 11:20:57 GMT
The deep blue areas on the 'anomaly' plot are between 2 and 4 degC below normal.
Considering that the blue runs right up to the coast, I don't see that it can only be slightly brackish water: that would simply be frozen. It needs to be ocean-strength salty.
I am sorry Graywolf, but I still don't have what I think is a reasonable explanation of the anomaly!
Unfortunately, even a 'reasonable' explanation might not be true.
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Post by sigurdur on Feb 22, 2016 14:51:33 GMT
www.thedailybeast.com/articles/2016/02/22/the-case-of-the-150-000-dead-penguins.htmlViral Mistake02.21.16 11:28 PM ET The Case of the 150,000 ‘Dead’ Penguins You may have read that an Antarctic colony of penguins was trapped by an iceberg and died, killed by climate change. But there’s a twist: All parts of the story turn out to be untrue. Some good news for 150,000 dead penguins in Antarctica: They might not be dead. Bad news: There may not be any hope for the rest of us.
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Post by sigurdur on Mar 4, 2016 15:10:51 GMT
climate.nasa.gov/blog/2396“I’m looking at 10 glaciers and I’m sitting on one,” said Dr. Heidi Roop of the University of Rochester over satellite phone. “I’m looking at a landscape that’s been here for millions of years unaltered by people.” Roop had called me from Taylor Glacier, an outflow of the East Antarctic Ice Sheet, which flows down through Antarctica’s McMurdo Dry Valleys. I’m looking at a mountain that no human has ever touched, ever. This is a landscape where it feels like humans shouldn’t be. There are no animal trails, no trees. There’s rock and ice and us.” Roop and the rest of the eight-person team, which included one driller, two scientists, three Ph.D. candidates and a camp cook/manager, had come to drill for ice cores at Taylor Glacier because of its unique configuration. Drilling ice cores is a technique climate scientists use to collect samples of trace gases such as carbon dioxide, methane and carbon monoxide that have been trapped in air bubbles in the layers of polar ice.
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Post by neutrino on Mar 9, 2016 2:49:29 GMT
sigurdur, excellent article. I found it interesting in the section “Traveling back in time" where they talk about *gasp* climate system shifting to warmer temps... again, nice article!
"... Because the twists and folds of Taylor Glacier bring old ice to the surface, scientists only need to drill a few meters deep to collect very large samples from specific time periods. The team can core down into, say, the transition at the end of the last glacial period 20,000 years ago, when the climate system shifted back towards warmer temperatures — with some rapid climate change “speed bumps” along the way. The team hopes that gathering large enough samples of gases from this time period will help us understand what drives large climate shifts, what the real rates of change are and if we’re headed towards any tipping points. ...”
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