[LEAPSECS] DUT1 = 0

[Richard Clark s]

Members of the list may find some amusement in 'Sans dessus dessous'
by Jules Verne.
English translations have appeared under the titles 'The Purchase of
the North Pole' and
'The Earth Turned Upside Down'. It relates the further schemes and
adventures of the leaders
of the Baltimore Gun Club. Their activities would certainly be of
interest to the IERS.

Richard

On Thu, Jul 7, 2022 at 1:30 AM Brooks Harris <brooks at edlmax.com> wrote:
>
> 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 at 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_Sauter at systemeyescomputerstore.com)
>> --
>> get my PGP public key with gpg --locate-external-keys
>> John_Sauter at systemeyescomputerstore.com
>>
>> _______________________________________________
>> LEAPSECS mailing list
>> LEAPSECS at leapsecond.com
>> https://pairlist6.pair.net/mailman/listinfo/leapsecs
>
>
> _______________________________________________
> LEAPSECS mailing list
> LEAPSECS at leapsecond.com
> https://pairlist6.pair.net/mailman/listinfo/leapsecs