Hi Things have to get pretty deep to be fully isolated from the seasons down to the “digits past the decimal” level. It *does* bring up an interesting place to set up your temperature stabilized timing lab though. The commute back and forth might be a bit of a chore :)
Bob > On Jan 25, 2018, at 3:42 PM, jimlux <jim...@earthlink.net> wrote: > > On 1/25/18 11:20 AM, Bob kb8tq wrote: >> Hi >> One of the unique features of underwater timing is that the sea bottom >> temperature >> (once you get well away from a coastline) is *very* stable. In some >> deployments, the “random” >> nature of ambient temperature that we fight all the time in the rest of the >> world, simply is not >> present. The device sits at 2.345 C and that’s it ….. > > > It helps that water density has a maximum at a particular temperature - water > that is warmer or colder tends to float up above it. I was just looking it up > and found apparently that does vary with salinity, too... oh no, another > miniscule factor to account for - is there a "seawater density nuts" list... > > Let's see, the bottom of Lake Tahoe (fresh water, so no salinity variation) > is probably fairly stable at 4C. Or any other freshwater later that actually > gets cold enough, and doesn't freeze to the bottom - so the deeper Great > Lakes would probably work. How warm does the bottom of Lake Superior get in > late summer? > > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
