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Posted

how much ice is made at various degrees? anyone kno of a graph/chart? does existing ice make a diff? like if theres 10" and its-5, does it make the same if theres 5 or 20"? does it make more or less if its 10 above or 10 below?

Posted

Basic heat transfer (in this case, cold transfer) properties dictate that the ice will thicken faster through thinner ice and with more temperature differential (colder air temperature). Neglecting the effects of water current and wind (which could be fairly significant factors), and assuming consistent ice (no insulating snow on top, no trapped air or frozen slush), ice will form twice as fast through 6" of ice compared to through 12" of ice, and would form twice as fast at 0°F than at +16°F. Of course the overlooked factors will affect this relationship, but the general trend is valid.

Maybe somebody else can provide a chart that takes the other factors into account.

Posted

THANK U! Where does one come by that kind of information/knowledge?

Posted

Throw big deep lakes into that mix and you might as well throw the chart away. Its probably not worth relying on it in the real world. There are far too many variables for me to rely on any chart.

Posted

Theres too many variables, bottom composistion, water color, current, cloud cover, sun angle, existing ice, lake size because back pressure inhibits growth, its endless. The answer is at 0 ice forms pretty fast.

Posted

Can you imagine having skim ice one day, and packing on 6"+ in 24 hours (at -20f)? That would be sweet.

Posted

CJH - thanks for the chart. The chart confirms my assumption of a linear replationship between ice formation and temperature differential from 32°F (.119 inches of ices formed in 24 hours for every 1°F difference). However, my assumption of a linear relationship between starting ice thickness and ice formation doesn't hold because the thickness that is being added over 24 hours is changing the ratio (i.e. 2":4" would change to about 6½":7" after 24 hours). I forgot a lot of what I learned 30 years ago in engineering school.

Posted

No problem!!

Posted

i knew u guys would figure it out for me lol thanks

Posted

this set me to thinking, couple winters ago we were on upper red. fished few spots around 3 and 4 miles out. eventually went out 9 miles. at that point i bottomed out the auger without hittin water. now what could induce such a difference in thickness? i was under impression ice should be thicker near shore where it forms first, no? any thoughts on this.....?

Posted

It all depends on what the delta t is at the time of getting through the ice while drilling in a counter clockwise circle(presuming you are north of the equator). I guess it would be much easier to just say I don't know or 2-1 equals 1, like a previous poster said, but I want to sound like I'm an engineer.

  • 'we have more fun' FishingMN Builders
Posted

the ice cracked and pushed another piece of ice under over over doubling the thickness.

Posted

sounds reasonable as there was a huuuge pressure ridge sorta close by..... few hundred yards maybe. thanks all!

Posted

I posted an even better chart during the first ice somewhere on here. It was developed from a research study done. Great read about ice. I am an engineer, a bit nerdy and intrigued by things like this.

http://lakeice.squarespace.com/ice-growth/

Posted

Just having a little fun with the engineers. Glad no one took me too seriously (like that's going to happen).

Posted

engineers take everything seriously! thats why they get paid so much lol

Posted

I will say that I enjoyed reading the posts on this topic... smirk

Posted

Same here. That's why I figured I'd chime in.

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  • Your Responses - Share & Have Fun :)

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