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Post by sigurdur on Dec 29, 2018 1:07:45 GMT
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Post by Ratty on Dec 29, 2018 4:57:35 GMT
Liquid water in clouds at -30°C !!
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Post by Ratty on Dec 29, 2018 8:30:43 GMT
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Post by nautonnier on Dec 29, 2018 10:03:15 GMT
Liquid water in clouds at -30°C !! That is possible in 2 ways - supercooled water like the IR radiation experiment in Icefisher's fridge or liquid water that has not had time to freeze such as at the top of a very active storm cloud. There have been cases of aircraft flying into 'rain' well above the tropopause where temperatures are similar to the Antarctic - the rain froze immediately on hitting the aircraft - a little exciting for the crew. There are times when a contrail will cause the supercooled water in the air to freeze and a single contrail rapidly expands into a layer of citrus. This is well known so why these 'expert' climate 'scientists' were surprised to find supercooled water is illuminating. I think it takes us back to nobody really seems to understand the processes involved with water freezing and 'releasing' latent heat. I haven't even seen good reasoning on how a water molecule can hold as much latent heat energy as it does. It does seem that on occasions it cannot release the latent heat and instead remains in an inappropriate phase for the temperature. This cannot be due to no inter-molecular collisions as these occur at nanosecond frequencies.
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Post by Ratty on Dec 29, 2018 11:09:47 GMT
Liquid water in clouds at -30°C !! That is possible in 2 ways - supercooled water like the IR radiation experiment in Icefisher's fridge or liquid water that has not had time to freeze such as at the top of a very active storm cloud. There have been cases of aircraft flying into 'rain' well above the tropopause where temperatures are similar to the Antarctic - the rain froze immediately on hitting the aircraft - a little exciting for the crew. There are times when a contrail will cause the supercooled water in the air to freeze and a single contrail rapidly expands into a layer of citrus. This is well known so why these 'expert' climate 'scientists' were surprised to find supercooled water is illuminating. I think it takes us back to nobody really seems to understand the processes involved with water freezing and 'releasing' latent heat. I haven't even seen good reasoning on how a water molecule can hold as much latent heat energy as it does. It does seem that on occasions it cannot release the latent heat and instead remains in an inappropriate phase for the temperature. This cannot be due to no inter-molecular collisions as these occur at nanosecond frequencies. I knew that.
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Post by blustnmtn on Dec 29, 2018 16:04:50 GMT
Liquid water in clouds at -30°C !! That is possible in 2 ways - supercooled water like the IR radiation experiment in Icefisher's fridge or liquid water that has not had time to freeze such as at the top of a very active storm cloud. There have been cases of aircraft flying into 'rain' well above the tropopause where temperatures are similar to the Antarctic - the rain froze immediately on hitting the aircraft - a little exciting for the crew. There are times when a contrail will cause the supercooled water in the air to freeze and a single contrail rapidly expands into a layer of citrus. This is well known so why these 'expert' climate 'scientists' were surprised to find supercooled water is illuminating. I think it takes us back to nobody really seems to understand the processes involved with water freezing and 'releasing' latent heat. I haven't even seen good reasoning on how a water molecule can hold as much latent heat energy as it does. It does seem that on occasions it cannot release the latent heat and instead remains in an inappropriate phase for the temperature. This cannot be due to no inter-molecular collisions as these occur at nanosecond frequencies. Orange or grapefruit?
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Post by nautonnier on Dec 29, 2018 20:51:04 GMT
That is possible in 2 ways - supercooled water like the IR radiation experiment in Icefisher's fridge or liquid water that has not had time to freeze such as at the top of a very active storm cloud. There have been cases of aircraft flying into 'rain' well above the tropopause where temperatures are similar to the Antarctic - the rain froze immediately on hitting the aircraft - a little exciting for the crew. There are times when a contrail will cause the supercooled water in the air to freeze and a single contrail rapidly expands into a layer of citrus. This is well known so why these 'expert' climate 'scientists' were surprised to find supercooled water is illuminating. I think it takes us back to nobody really seems to understand the processes involved with water freezing and 'releasing' latent heat. I haven't even seen good reasoning on how a water molecule can hold as much latent heat energy as it does. It does seem that on occasions it cannot release the latent heat and instead remains in an inappropriate phase for the temperature. This cannot be due to no inter-molecular collisions as these occur at nanosecond frequencies. Orange or grapefruit? Lemon... {^(&%!! auto correct on this tablet!)
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Post by Ratty on Dec 29, 2018 23:19:11 GMT
[ Snip ] Lemon... {^(&%!! auto correct on this tablet!) Take a couple of these .... you'll feel better.
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Post by sigurdur on Feb 9, 2019 18:45:23 GMT
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Post by Ratty on Feb 10, 2019 11:02:50 GMT
Climate change clues: Why scientists are blowing up ice in Antarctica Setting off explosives under the ice is such a natural thing .... when the Koreans are involved. South or North? New Zealand scientists have detonated explosives to help reveal how Antarctica's ice shelves might respond to a warming world.
A team led by the University of Otago's Associate Professor David Prior has spent the past three weeks camping out at remote Terra Nova Bay for one of this season's most intriguing research projects on the ice.
Prior said the main aim was to find what controlled a process called ice deformation – and how ice sheets might respond to temperature changes or shifting conditions at ice shelf edges.
In both Antarctica and Greenland, increases in the rate of flow of ice from the land to the sea caused global sea levels to rise.
While it was already clear that climate change influenced this process, there was less certainty about the rate of sea level change that would come in the next few years.
That made understanding how ice flow would respond to the changing climate critically important.
A big driver of ice flow was ice deformation – and this happened where the fast-moving Priestley Glacier met slow-moving ice at what's called the shear margin.
Prior's project was taking a deeper look at the effect by drilling holes in the glacier, placing explosives in them, and letting them off.
"We recorded the explosions and ice behaviour through geophones and the speed of the sound waves will tell us about the physical properties of ice," he said.
The data they gathered was "almost pristine" – and aligned with how they predicted the glacier to react, save for a few surprises along the way.
"One of the things we did was record the glacier continuously, not just when we let explosions off," he said.
"What we found was there is a massive amount of activity in the ice in the morning for about four to five hours as the day warms up.
"We think this has to do with the surface of the ice warming but it is going to need more investigation."
It was the first time this type of seismology research has been carried out on the shear zone of a glacier.
By combining the data they gained on the ice with laboratory work, they would be able to put together an extrapolation describing ice flow behaviour - which could ultimately be used in ice sheet modelling.
The ultimate goal was to be able to predict how fast ice flow would respond to warming temperatures and stress changes related to ice shelf collapse.
Antarctica stores an equivalent 60m of potential sea level rise, and scientists have warned that what might unfold over coming millennia might be determined in just a few decades, when and if a "tipping point" is crossed.
Antarctica New Zealand chief scientific adviser Dr Fiona Shanhun said the work wouldn't have been possible without support from the Korean Polar Research Institute.
"The team stayed at Jang Bogo Station which is the Korean base in Terra Nova Bay, about 350km north of Scott Base," she said.
This collaboration demonstrates the importance of working with other countries' programmes to better understand ice dynamics in a warming world, she said.
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Post by nautonnier on Feb 10, 2019 14:47:00 GMT
imagine the panic if after their explosion like a line of dominoes the glacier had accelerated into the ocean leading to a tsunami flooding South Australia and New Zealand
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Post by missouriboy on Feb 10, 2019 18:08:13 GMT
imagine the panic if after their explosion like a line of dominoes the glacier had accelerated into the ocean leading to a tsunami flooding South Australia and New Zealand The clan of the legal gun for hire would be quickly gathering.
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Post by blustnmtn on May 12, 2019 22:21:33 GMT
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Post by Ratty on May 18, 2019 13:49:34 GMT
If only we could tow it up and ship it to the centre of Australia .....
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Post by nautonnier on May 18, 2019 14:33:46 GMT
It is not so much hot air above the WAIS as hot volcanoes below.... "Nearly 100 New Volcanoes Found Hiding Beneath West Antarctic Ice Sheet
A team of geoscientists at the University of Edinburgh have found 91 volcanoes hiding beneath the Antarctic Ice Sheet, which – when added to the 47 fiery mountains already known about – makes this the densest concentration of volcanoes anywhere on Planet Earth.
As reported in a special edition of the Geological Society of London, these newly discovered volcanoes “are widely distributed throughout the deep basins of West Antarctica, but are especially concentrated and orientated along the 3,000-kilometre (1,864-mile) central axis of the West Antarctic Rift System.”"www.iflscience.com/environment/nearly-100-new-volcanoes-found-hiding-beneath-west-antarctic-ice-sheet/and
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