revised and links checked 12/3/2015
OCEANOGRAPHY, Earth Sciences
ICE IT'S NOT JUST FOR CHILLING YOUR DRINK
 |
| Photo Courtesy NOAA GLERL. Ice Systems are Proving more Dynamic and Faster than Previously thought. |
AN ANTHOLOGY OF RECENT ICE STORIES EVENTS AND VIDEOS ILLUSTRATING THE DYNAMISM OF SEA ICE SYSTEMS
Antarctic Discovery, Within the Definition of "Glacial Pace" Two Ice Bodies are "Speeding"
Source: Huff Post Internet Newspaper "Green" Section February 1, 2012
A pair of teardrop shaped "lakes" which sit atop an Antarctic Ice Shelf have been found to be moving at the incredibly fast (for glacial movement) speed of 5 feet per day. The "lakes" actually sit atop the George VI (The "Kings Speech Guy) Ice shelf in Antarctica and move much faster than the underlying ice shelf. The driving process behind this "blinding" speed (in glacial terms) is something called "Viscous Buckling." Pour something gooey like melted chocolate over an obstruction like a wafer and you can see a flow pattern that appears to feature a sort of folding back process. That's it, "Viscous Buckling." The "lakes" are pouring horizontally and running into Alexander Island and folding around it. The process is mechanical and not presently driven by climatic change though the area has warmed over two degrees on average over the last decade. However this glacial "speeding" is of high interest to earth scientists studying climate change and sea level change. It is believed that in a very few years the process will be affected dramatically by climate change if current changes continue. Follow the hyperlink to the HUFF POST original story.Check our Oceanography Section for more detailed readings on the Arctic and Antarctic regions, and climate change generally.
Link To Huffington Post Story:http://www.huffingtonpost.com/2012/02/01/george-vi-ice-shelf-antarctic-lakes_n_1247041.html?ncid=edlinkusaolp00000003&icid=maing-grid10%7Chtmlws-main-nb%7Cdl3%7Csec1_lnk3%26pLid%3D131797
Link To Huffington Post Story:http://www.huffingtonpost.com/2012/02/01/george-vi-ice-shelf-antarctic-lakes_n_1247041.html?ncid=edlinkusaolp00000003&icid=maing-grid10%7Chtmlws-main-nb%7Cdl3%7Csec1_lnk3%26pLid%3D131797
 |
| Ice is turning out to be a way more dynamic substance than was previously thought, capable of organizing into far more complex systems than previously thought. What you see above is a still from a time lapse video of a "Brinicle" in action. The "Brinicle" appears under an ocean ice crust and extends like an icicle to the sea floor where it's freezing touch kills slow moving Sea Stars and Sea Cucumbers in a long narrow path of its "touch down". A cold slow motion action that when captured on time lapse photography looks a bit like a tornado. Watch the complete video on BBC Nature News via this link: http://www.bbc.co.uk/nature/15835017 |
-------------------------------------------------------------------------------------------------------------------
 |
| NASA PHOTO |
Click here to watch the largest glacial calving event ever recorded then hit the back button on YouTube to come back here for more major ice movements recorded.
---------------------------------------------------------------------------------------------------------------------------------------------
FULL FRONTAL GLACIATION: http://www.youtube.com/watch?NR=1&v=RL3EjH9-WSs&feature=endscreen
--------------------------------------------------------------------------------------------------------------------------------------------
The Collapse of a Glacial Tunnel: http://www.youtube.com/watch?v=vc6Wvp6J4Aw
-----------------------------------------------------------------------------------------------------------------------------------------------
Ice Island Forms off Greenland: http://www.youtube.com/watch?v=BTuDaQarKKI&feature=endscreen&NR=1
-----------------------------------------------------------------------------------------------------------------------------------------------
ICE SHEET DYNAMICS EXPLAINED AND DIAGRAMED:
Flow dynamics
The main cause of flow within glaciers can be attributed to an increase in the surface slope, brought upon by an imbalance between the amounts of accumulation vs. ablation. This imbalance increases the shear stress on a glacier until it begins to flow. The flow velocity and deformation will increase as the equilibrium line between these two processes is approached, but are also affected by the slope of the ice, the ice thickness and temperature.[1][2]
Read the Fill explanation on Wikipedia:
No comments:
Post a Comment