[LEAPSECS] Far past and far future
Clive D.W. Feather
clive at davros.org
Thu May 26 18:00:40 EDT 2011
Rob Seaman said:
>> But how long term is that? Does anyone have figures on how far back or
>> forward I can project based on that figure? What was the length of the day
>> in the time of the dinosaurs?
> The abstract to the reference in Steve's reply rather suggests a number of 22 SI-hours at 620 MYA (ymmv).
The whole paper suggests:
18.8 hours at 2450 Ma
20.8 hours at 900 Ma
21.9 hours at 620 Ma
Converting the paper's numbers into smooth curves for angular momentum and
lunar distance and then back-calculating, that projects into the future as:
30 hours at 1000 My
48 hours at 2100 My
The latter, allegedly, is when increased solar radiation will boil the
oceans and effectively stop tidal coupling.
Clive D.W. Feather | If you lie to the compiler,
Email: clive at davros.org | it will get its revenge.
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