Subject: Re: "G-g-global warm-m-ming!"
On Monday, January 1, 2018 at 5:37:47 PM UTC-5, Neil wrote:
> On 1/1/2018 11:14 AM, RichA wrote:
> > On Sunday, 31 December 2017 16:40:45 UTC-5, Neil wrote:
> >> On 12/31/2017 4:30 PM, Savageduck wrote:
> >>> On Dec 31, 2017, RichA wrote
> >>>> Toronto lakefront. Lake freezes all the way from the city
> >>>> to Centre Island.
> >>>> Predictions are Niagara Falls and all of Lake Erie may
> >>>> freeze over.
> >> It's typical for Lake Erie to freeze over as it's only
> >> about 60' at its deepest.
> > 200ft. 60ft is the average. It doesn't always freeze.
> > Also, a lot of it freezes, but I don't think it's ever
> > been 100% of the surface. But I figure it must have
> >because there have been cold spells in the past.
> OK... Still, there are many years when ice breakers are
> used to cut a channel through the completely frozen lake.
> Also, that 210' depth is in the east end of the lake,
> where the lake effect snowfall causes cities and towns to
> deal with 5' or more in a single day of snow. Get enough
> days of that and the lake freezes over.
Here's a handy reference:
For all the lakes combined, the Annual Max Ice
coverage's average is 55%:
And for Lake Erie specifically (Annual Max Ice Cover):
KISS summary from eyeballing the above chart, looks there's
been seven years since 1973 (inclusive) where Erie has hit
100% coverage, which is 7/25 = 15% of the time. Similarly,
there's been 15 years (33%) where its been less than 90%,
which means that 67% of the time it is 90% or higher.