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  #1  
Old 06-17-2012, 07:52 PM
ralph124c ralph124c is offline
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Are There Tides In The Caspian Sea?

It would seem so-it is a huge inland sea. But I notice that it is longer in the N-S direction than E-W..so possibly the tides raised by the moon would be small.
Incidentally-was the Caspian Sea once connected with any of the oceans?
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  #2  
Old 06-17-2012, 11:47 PM
Mr Downtown Mr Downtown is offline
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I get asked this about Lake Michigan quite often. Theoretically, there are tides in your teacup. Whether they can be differentiated from normal waves is another matter.
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Old 06-18-2012, 01:53 AM
md2000 md2000 is offline
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Even the Mediterrranean, from what I can find, barely has tides, unlike the real ocean.

Venice, for example, certainly does not have to deal with water level changes of 6 feet or more; maybe a extra foot or two during fall and spring neap tides.

Last edited by md2000; 06-18-2012 at 01:55 AM..
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Old 06-18-2012, 03:23 AM
kombatminipig kombatminipig is offline
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I just happened to get home from a business trip to Baku. Anecdotal evidence naturally, but I didn't notice any tidemarks on the shore there.
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Old 06-18-2012, 08:54 AM
Qadgop the Mercotan Qadgop the Mercotan is offline
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This article is much less helpful than I initally thought it would be.

Riddles of high and low tides in the Caspian Sea.

My other research indicates there are really no significantly measurable tides in the Caspian; all tidal effects being easily within the range of normal wind/current changes.
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  #6  
Old 06-18-2012, 09:29 AM
Athena Athena is offline
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Smaller bodies of water like the Great Lakes and presumably the Caspian Sea have a tide-like phenomena called a seiche. They're usually pretty small, but can occasionally raise or lower the water level 2 or 3 feet or more.
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Old 06-18-2012, 09:42 AM
Musicat Musicat is offline
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Quote:
Originally Posted by Athena View Post
Smaller bodies of water like the Great Lakes and presumably the Caspian Sea have a tide-like phenomena called a seiche. They're usually pretty small, but can occasionally raise or lower the water level 2 or 3 feet or more.
It's tide-like only because the water level can change; it's not tide-like with respect to regularity or links to the Sun/Moon.

Seiches are more of a factor if the lake is oriented towards the wind. Since the weather moves mostly from west to east around the Great Lakes, Erie meets that orientation the best. Lake Michigan is affected the least.

Living on Lake Michigan, I'd notice a sudden 3 foot change in level pretty quickly, and I've never been aware of one.
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Old 06-18-2012, 01:20 PM
N9IWP N9IWP is offline
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The Great likes have tides, but they are smaller than the wind variation

http://oceanservice.noaa.gov/facts/gltides.html

Brian
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Old 06-18-2012, 06:48 PM
dstarfire dstarfire is offline
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I'm sure there's a formula out there that gives you average tidal change based on a body of waters' east-west dimension.

With that formula in hand, we'd know if current technology is sufficient to measure the theoretical tides in a teacup. Would make for a rather interesting research paper.
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  #10  
Old 06-18-2012, 08:16 PM
Ponderoid Ponderoid is offline
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Quote:
Originally Posted by md2000 View Post
maybe a extra foot or two during fall and spring neap tides.
Nitpick: that should just be "during spring tides." The season of the year doesn't have anything to do with it, and neap tides are when the tidal variation is at the smallest.
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