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Marine Resources Forecasts, Weather, Temps, Tides, & Astronomical Data


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  #1  
Old 10-07-2005, 05:38 AM
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Striperjim Striperjim is offline
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Default The Highest Tides on earth

A view of the tides at Halls Harbour on Nova Scotia's Bay of Fundy. This is a time lapse of the tidal rise and fall over a period of six and a half hours. During the next six hours of ebb the fishermen unload their boats on the dock. That's a high tide every 12 and 1/2 hours! There are two high tides every 25 hours.

There are some extreme cases: the Bay of Fundy, on the east coast of Canada, features the largest well-documented tidal ranges in the world, 16 metres (53 feet), because of the shape of the bay. Southampton in the United Kingdom has a double high tide caused by the flow of water around the Isle of Wight, and Weymouth, Dorset has a double low tide because of the Isle of Portland. Ungava Bay in Nunavut, north eastern Canada, is believed by some experts to have higher tidal ranges than the Bay of Fundy (about 17 metres or 56 feet), but it is free of pack ice for only about four months every year, whereas the Bay of Fundy rarely freezes even in the winter.
There are only very slight tides in the Mediterranean Sea and the Baltic Sea due to their narrow connections with the Atlantic Ocean. Extremely small tides also occur for the same reason in the Gulf of Mexico and Sea of Japan. On the southern coast of Australia, because the coast is extremely straight (partly due to the tiny quantities of runoff flowing from rivers), tidal ranges are equally small.


What are the different types of Tides?
When the sun and moon are aligned, there are exceptionally strong gravitational forces, causing very high and very low tides which are called spring tides, though they have nothing to do with the season. When the sun and moon are not aligned, the gravitational forces cancel each other out, and the tides are not as dramatically high and low. These are called neap tides.
Spring Tides
When the moon is full or new, the gravitational pull of the moon and sun are combined. At these times, the high tides are very high and the low tides are very low. This is known as a spring high tide. Spring tides are especially strong tides (they do not have anything to do with the season Spring). They occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.

Neap Tides
During the moon's quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between high and low tides and is known as a neap tide. Neap tides are especially weak tides. They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another (with respect to the Earth). Neap tides occur during quarter moons

What causes tides?
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  #2  
Old 08-22-2006, 02:15 PM
Shocktherapy Shocktherapy is offline
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fascinating........I read everything on the link too.............I should have studied oceanography...........

Thanks Jim!
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  #3  
Old 01-20-2008, 06:48 AM
Dobb Dobb is offline
 
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Default Re: The Highest Tides on earth

The tides are quite amazing here,,everytime they come in I am watching in awe,,alot of water moves in and out . Here's some of my pics from the bay.
First pic I am looking out over the bay.
Second pic I am standing in the middle of first pic looking back in, I am getting close to a 1/2 mile out.
Third pic is another area looking out over low tide.
last pic is same areaalittle closer to the point, at about 3/4 tide. Alot of people fish this area.
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Old 01-20-2008, 07:01 AM
Dobb Dobb is offline
 
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Default Re: The Highest Tides on earth

Alot of fishing pressure in this area,,looking down the bay,,and then up the bay.
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Last edited by Dobb; 01-20-2008 at 07:03 AM. Reason: typo
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  #5  
Old 01-20-2008, 07:09 AM
Dobb Dobb is offline
 
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Default Re: The Highest Tides on earth

Here's a pic of a sturgeon caught in a wier,,not allowed to keep them so he pulls them out and releases them.
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  #6  
Old 01-20-2008, 07:19 AM
Dobb Dobb is offline
 
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Default Re: The Highest Tides on earth

Here's one of us night fishing,,if you look close you can make out a real and pole.
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  #7  
Old 01-20-2008, 07:28 AM
Dobb Dobb is offline
 
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Default Re: The Highest Tides on earth

Here's some misc pics of the Bay.
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