About
Every winter a layer of carbon dioxide ice-or, dry ice-condenses in the Southern polar region, forming a seasonal polar cap less than 1 meter deep. Early in the spring the ice layer begins to sublimate (going directly from a solid to gas) from the top and bottom of the ice layer. Under the ice gas pressure builds up until a weak spot in the ice layer ruptures. The gas rushes out and as it escapes it erodes a bit of the surface. Fine particles are carried by the gas to the top of the ice and then fall out in fan-shaped deposits. The direction of the fan shows the direction either of the wind or down the slope. If the wind is not blowing a dark blotch settles around the spot the gas escaped. T — NASA JPL · 2014. ABD devlet eseri: kamu mali, ticari islerde de serbestce kullanilabilir.
Source and licence
This work is public domain or openly licensed. The licence terms are published by the source.
How do I open it?
Use the Shopy 101 app to download it or read it in place. Anything you add to your library stays the same on every device.