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2 December, 2008

I learn something new every moment

Intuitively, the wind blowing against mountain ranges must have some impact on the Earth's rate of rotation, but I thought it'd be barely measurable, never mind significant.

Seems not: according to the BBC (I know, I know; according to real researchers who a BBC journalist claims to have quoted accurately, if you prefer), the wind is responsible for thousands of nanoseconds per day of variation in the Earth's rotation rate. Not much, but enough to prevent rotation being useful in calibrating measurement of time; GPS needs consistent accuracy of within 16 ns.

Comments

oo. missed that article. ta.

Posted by Saltation at December 9, 2008 08:03 PM
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