Ice Ridges

upthesaukee · 02-04-2009, 07:45 AM

An earlier thread on the lake freezing talked about ice shards sticking almost straight up in areas around Rattlesnake. Also, driving on Rte 11 back then, I noticed what could have been shards off of Ames Farm, and also in Alton Bay both by Echo Point and then down by Sandy Point. They seemed to be caused by thin sheets of ice forming which were then destroyed by high winds. Finally we got the one good cold snap we needed, and that froze the ice solid, and left these pushed up shards.

Now we have had snow, and quite a bit of it. There may be some pressure ridges under it along with the shards.

Not being an expert on pressure ridges ( I know not to hit them, if at all possible

), but with the consistently cold temps, no thaw, perhaps there is not the movement of ice plates like we have had in the past few years.

Just a thought.

Merrymeeting · 02-04-2009, 10:38 AM

Quote:

Originally Posted by upthesaukee

Not being an expert on pressure ridges ( I know not to hit them, if at all possible

), but with the consistently cold temps, no thaw, perhaps there is not the movement of ice plates like we have had in the past few years.

Just a thought.

I'm far from an expert also. But in thinking about this the other day, I think the upthesaukee is right about the consistently cold temps.

It will be interesting to see if they start appearing this coming weekend. I suspect that any changes in lake level have a lot to do with them also. Assuming (and hoping) the thaw predicted for this coming weekend happens, I would expect the level to rise some, which will cause some shifting in the ice pack.

trfour · 02-04-2009, 10:04 PM

More on this topic; http://en.wikipedia.org/wiki/Pressure_ridge

SAMIAM · 02-06-2009, 02:16 PM

Is there a ridge around Shep Browns/Bear Island???

murph · 02-06-2009, 05:05 PM

Rode to Sheps last weekend and I cam from Patrician Shores which is coming from Center Harbor. I was meeting a friend out there and I didn't see any ridges.

02-04-2009, 07:45 AM	#1
upthesaukee Senior Member Join Date: Jan 2003 Location: Alton Bay Posts: 5,602 Blog Entries: 2 Thanks: 2,466 Thanked 1,983 Times in 1,083 Posts	ice shards An earlier thread on the lake freezing talked about ice shards sticking almost straight up in areas around Rattlesnake. Also, driving on Rte 11 back then, I noticed what could have been shards off of Ames Farm, and also in Alton Bay both by Echo Point and then down by Sandy Point. They seemed to be caused by thin sheets of ice forming which were then destroyed by high winds. Finally we got the one good cold snap we needed, and that froze the ice solid, and left these pushed up shards. Now we have had snow, and quite a bit of it. There may be some pressure ridges under it along with the shards. Not being an expert on pressure ridges ( I know not to hit them, if at all possible), but with the consistently cold temps, no thaw, perhaps there is not the movement of ice plates like we have had in the past few years. Just a thought. __________________ I Live Here... I am always UPTHESAUKEE !!!!

02-04-2009, 10:04 PM	#3
trfour Senior Member Join Date: Nov 2002 Location: The Lakes, Central NH. and Dallas/Fort Worth TX. Posts: 3,694 Blog Entries: 3 Thanks: 3,069 Thanked 472 Times in 236 Posts	Some How's & Why's More on this topic; http://en.wikipedia.org/wiki/Pressure_ridge __________________ *trfour* Always Remember, The Best Safety Device In The Boat, or on a PWC Snowmobile etc., Is YOU! Safe sledding tips and much more; http://www.snowmobile.org/snowmobiling-safety.html

02-06-2009, 02:16 PM	#4
SAMIAM Senior Member Join Date: Apr 2004 Location: Moultonborough Posts: 2,909 Thanks: 337 Thanked 1,686 Times in 592 Posts	Is there a ridge around Shep Browns/Bear Island???

02-06-2009, 05:05 PM	#5
murph Senior Member Join Date: Apr 2004 Location: Westford/Meredith Posts: 66 Thanks: 0 Thanked 1 Time in 1 Post	Rode to Sheps last weekend and I cam from Patrician Shores which is coming from Center Harbor. I was meeting a friend out there and I didn't see any ridges.