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Topic Title: Earth's gravity revealed Topic Summary: geoid Created On: 03/31/2011 07:11 AM Status: Post and Reply |
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03/31/2011 07:11 AM
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After just two years in orbit, ESA's GOCE satellite has gathered enough data to map Earth's gravity with unrivalled precision. Scientists now have access to the most accurate model of the 'geoid' ever produced to further our understanding of how Earth works.
The geoid is the surface of an ideal global ocean in the absence of tides and currents, shaped only by gravity. It is a crucial reference for measuring ocean circulation, sea-level change and ice dynamics - all affected by climate change. maybe even help predict earthquakes http://www.esa.int/SPECIALS/GOCE/SEM1AK6UPLG_0.html 
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03/31/2011 07:19 AM
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Looks like a paper mache model.
-------------------------  If you're not part of the solution, you're part of the precipitate. |
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03/31/2011 08:28 AM
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Those are the new " beans "..I ate a few last week. Highly recommended |
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03/31/2011 11:12 AM
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Booty, you might want to go to "profile" and see if you signature doesn't have a bunch of hard returns. The geoid is sort of a puzzle. Andes stick out, Himalaya and Tibet don't. Hawaii really sticks up. |
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03/31/2011 02:08 PM
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Well, some of it makes sense. Higher altitudes mean less gravity. In fact, if you have two synchronized clocks (atomic clocks), and you place one at sea level, and the other at the top of the Andes or Himalayas, they will not stay in sync. The closer you get to the planet's surface, the stronger the gravity. Attend weight watcher's meetings in Nepal. ------------------------- I am outta here. I'll be back to the NSR in the fall. Until then, have a nice spring and summer. Later, dudes. |
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04/01/2011 06:44 AM
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Noticed the same WW.
Gravity is effected by density so some subsurface discontinuity of composition could be at work. Similarity of Himalayas and Rockies (not showing much gravity) could be uplift of sedimentary (light) in higher proportion rather that volcanic (heavy) as Hawaii and the Andes? Really cool, look at the gravity "hole" left in the Indian Ocean basin from where India rammed Asia. |
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