NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: no leap second coming in December
From: Geoffrey Kolbe
Date: 2004 Jul 29, 07:25 +0100
From: Geoffrey Kolbe
Date: 2004 Jul 29, 07:25 +0100
Sorry George, I was quoting myself! I wanted to change the message I was about to send, but my email program, for some reason best known to itself, put my revised message in quotes. I am afraid I cannot now remember where I saw the article on the effects of dams and reservoirs on Delta T. Probably the New Scientist magazine. But the gist of it was that sufficiently large bodies of water have now been trapped in latitudes lower than they would otherwise occupy, that the effect on the Earth's angular momentum is measurable and has had to be accounted for by the odd leap second or so. Geoffrey Kolbe At 22:57 28/07/04, you wrote: >Geoffrey Kolbe quoted from what was presumably a Nav-L list message which >stated- > > >>I do know that the large dam/reservoir projects of the first half of the > >>20th century contributed significantly to Delta T. > >and replied- > > >Perhaps the drying up of the Aral sea and (to a lesser extent) the Dead sea > >is cancelling this contribuion...? > >============================= > >It's odd, because I don't seem to have received that message, to which >Geoffrey replied. Has anyone else missed it? Or has my spam-filter >discarded baby with bathwater, perhaps? Would someone (Geoffrey, perhaps) >kindly resend the complete message, complete with the name of its author, >and send a separate message saying that he has done so. > >George. > >================================================================ >contact George Huxtable by email at george@huxtable.u-net.com, by phone at >01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy >Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. >================================================================