THE PLANET INSIDE
Scientists are probing the secrets of the inner core---and learning how
it might have saved life on Earth
https://www.science.org/content/article/scientists-probing-secrets-earths-inner-core-saved-life-planet
An accelerating high-latitude jet in Earth's core
https://eprints.whiterose.ac.uk/108112/1/accepted_version.pdf
Measurement of diurnal and semidiurnal rotational variations and tidal
parameters of Earth
https://www.researchgate.net/publication/4681204_Measurement_of_diurnal_and_semidiurnal_rotational_variations_and_tidal_parameters_of_Earth
Ocean and atmospheric tides standards (used for EIGEN gravity field
modeling)
https://iers-conventions.obspm.fr/content/supporting_material/chapter6/BIPM_ocean_tides_2007.pdf
"Prediction is difficult, especially about the future."
-Brooks
On 2022-07-06 4:38 PM, Billy Croan wrote:
Interesting that the reversal in direction for the first time in two
decades (maybe more?) is continuing.
I wonder if they will announce the cause of these adjustments. i.e. a
specific hurricane or earthquake or interstellar solar radiation?
IERS' website leaves much to be desired.
I'd love to know, if there was some physics student on this list, how
much energy would it consume to physically alter the earth's rotation
instead of using leap seconds. Yeah, moving the world sounds like a
de-facto 'can't be done' scenario.
But we're talking an extremely small difference in rotation over the
course of ten years. If all aircraft landed (and used their brakes)
in the same direction, would that impart a measurable spin over the
course of a decade? Could a few large gyros, operating continuously
for a decade, even out the spin? Would their energy cost over that
time be more than the cost of the software bugs that leap seconds
effervesce?
On Wed, Jul 6, 2022 at 2:09 PM John Sauter via LEAPSECS
<leapsecs@leapsecond.com <mailto:leapsecs@leapsecond.com>> wrote:
I hope everyone noticed that the IERS issued Bulletin D 142 today,
which raises DUT1 from -0.1 to 0 as of July 28. I attach the bulletin
and my chart of values of DUT1. I predict a negative leap second
around the end of this decade.
John Sauter (john_sau...@systemeyescomputerstore.com
<mailto:john_sau...@systemeyescomputerstore.com>)
--
get my PGP public key with gpg --locate-external-keys
john_sau...@systemeyescomputerstore.com
<mailto:john_sau...@systemeyescomputerstore.com>
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