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kathatchling on May 11th, 2007 05:28 pm (UTC)
these go with the article on canada's gravity:



the first is a movie of the grace data, a frame every month since early 2003. They show annual cycles of gravity anomalies- the most dramatic ones in S.A. and Africa are caused by wet/dry season mass differences (!)

The other is the data compressed to show the permanent grav. anomalies, (over human timescales anyway) as well as how much the 2 GRACE satellites have improved our data.