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Winter Temperatures


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#11 Guest_peter mccue_*

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Posted 04 December 2001 - 04:02 PM

Winter temps are a little higher than ours Newt, but low enough to make life difficult I think.

It will be interesting to hear how you get on, winter Carping can be a real challenge but you sound to me like your up for it.

One more thing, winter Carp in the U.K are often a lot more colourful & better looking!

Best of luck Newt.

#12 Guest_chesters1_*

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Posted 05 December 2001 - 01:39 AM

ive often wondered why if hot air rises why doesn`t warm water?

#13 Guest_Steve Burke_*

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Posted 05 December 2001 - 03:28 AM

Warm water does rise. This is because warm water is less dense than anything but very cold water. In fact water is at its heaviest at approx 4C (39F). This is why ice floats on the surface.

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#14 Guest_chesters1_*

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Posted 05 December 2001 - 05:07 AM

so why are the deeps warmer than the shallows
surely the warm water should be on top? or is it the bottom ie the ground acts like a heater rewarming the cold water?although i did hear from an expert once that if this phenomenum didn`t occur then the ice would form from the bottom up and never thaw out!

#15 Guest_Newt_*

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Posted 05 December 2001 - 09:22 AM

Chesters1 - water is peculiar stuff. Lucky thing for us too. It becomes more dense (heavy, if you will) as it cools as do most liquids. However, at 39F (3.888C) it reaches maximum density and if cooled further, becomes less dense until it freezes. Thus, any water that cools below 39 will rise. In cold weather, this means that as it approaches freezing temp, it rises toward the surface. Thus, ice forms on top of a body of water rather than at the bottom. Once it freezes, it tends to insulate which is a good thing.

During warm weather, water becomes less dense as it warms. Thus the cooler water is at the bottom. Also (usually) a good thing although in large bodies of water with no current, you may well get stratification and wind up with a layer of water at the bottom that has almost no oxygen so fish (and other critters) avoid it.

[This message has been edited by Newt (edited 05 December 2001).]

#16 Guest_peter mccue_*

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Posted 05 December 2001 - 06:15 PM

Newt referred to the insulation properties of ice, which brought to mind last year when a cold snap froze my garden pond over completely, fortunately it froze clear & I could watch the Carp etc easily. With clear sunny days the activity of everything increased dramatically, fish & bugs. Obviously the situation couldn't be left due to there being no exchange of gases, but it makes you wonder how the feeding activity changes in the wild when lakes freeze over.