If you’re not familiar with the ideal gas law (compression heats, expanding cools), then here’s a better way to think about it.Gases (which includes air) can be though of as a hell of a lot of perfectly bouncy rubber balls.If you happen to find yourself in the desert, have a question, and/or want to waste time with a Mathematician and a Physicist, you can find us here from to on Thursday the 31st. Got a nagging question that’s been bothering you for years or just want to hang out and listen to other people’s questions?
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Results of the discovery are being published this week in the Proceedings of the National Academy of Sciences. “The oldest ice found in drilled cores is around 800,000 years old and with this new technique we think we can look in other regions and successfully date polar ice back as far as 1.5 million years,” said Christo Buizert, a postdoctoral researcher at Oregon State University and lead author on the PNAS article.
The work was funded by the National Science Foundation and the U. “That is very exciting because a lot of interesting things happened with the Earth’s climate prior to 800,000 years ago that we currently cannot study in the ice core record.” Krypton dating is much like the more-heralded carbon-14 dating technique that measures the decay of a radioactive isotope – which has constant and well-known decay rates – and compares it to a stable isotope.
Since it is cosmic ray based, it makes me wonder if it could be used to reconstruct the cosmic ray record to test Svensmark’s theory of cosmic ray modulation of climate.
How it works (graphic from Argonne National Laboratory): CORVALLIS, Ore.
That same schedule goes on to say: “Ask a Mathematician / Ask a Physicist is two people sitting in the desert talking to other people in the desert.
Here’s something useful that works like radiocarbon dating, but on ice.
So air actually maintains the same amount of total energy regardless of height, it’s just a question of how much of that energy is tied up in gravitational potential (being up high) or kinetic energy (moving fast).
When a vertical column of air has the same amount of energy, then “bubbles” of air are free to move up and down, and those bubbles will have the same temperature of the surrounding air when they arrive. Temperature drops as you go up, but hot air still rises through cold air.
This is a little ballpark, because the atmosphere is more complicated than air just being stacked up.