July 18, 2000
American Geophysical Union
For over a century, scientists have sought to understand the cause of one of Earth's wobbling motions as it rotates. Now, thanks to recently developed models, the mystery is solved: the main cause of this wobble is changing pressure on the ocean bottom.
WASHINGTON - The century old mystery of Earth's "Chandler wobble" has been solved by a scientist at NASA's Jet Propulsion Laboratory in Pasadena, California. The Chandler wobble, named for its 1891 discoverer, Seth Carlo Chandler, Jr., an American businessman turned astronomer, is one of several wobbling motions exhibited by the Earth as it rotates on its axis, much as a top wobbles as it spins.
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American Geophysical Union. "A Mystery Of Earth's Wobble Solved: It's The Ocean." ScienceDaily. ScienceDaily, 18 July 2000. <www.sciencedaily.com/releases/2000/07/000717123812.htm>.
American Geophysical Union. (2000, July 18). A Mystery Of Earth's Wobble Solved: It's The Ocean. ScienceDaily. Retrieved March 10, 2014 from www.sciencedaily.com/releases/2000/07/000717123812.htm
American Geophysical Union. "A Mystery Of Earth's Wobble Solved: It's The Ocean." ScienceDaily. www.sciencedaily.com/releases/2000/07/000717123812.htm (accessed March 10, 2014).