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From: Bill (no email)
Date: Wed Jun 07 2006 - 18:10:54 EDT
Recently ran across the following site:
http://www.glerl.noaa.gov/res/glcfs/
One bit of information it provides is surface current. I have read that
there can be wind induced surface currents given sufficient fetch and
duration in the order of -.1 to 0.4 kt, but that is only a couple of percent
of velocity, and bears off the wind direction due to the Coriolis effect.
I was surprised to see currents in the 1 kt range (with a 2.8 kt scale, on
Lake Michigan, changing direction rapidly and dramatacally over 24-hour
periods.
Initially I thought some sort of thermal affect until I noticed the changes
over 3-hour periods, then day-to-day. Also noticed that the water levels at
N & S ends of Lake Michigan can varying by an inch.
Given the rate of change, could it be some sort of set up, and small
seiche(s) at work?
Bill
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