You may note the compression clouds streaming east in the pic.
As you see the higher the altitude the cleaner the compression cloud stream is. there are good reasons which are well noted in the research of locals.
The wind runs at 40 knots commonly and against the flow of the bergs which are moving according to currents.
In the pic below it is now March of 2008. here the piece of ice, an iceberg, is 6180 ssquare miles and a little taller than 200 feet. for reference this single engine plane is about 1500 feet up and headed parallel to the long dimension of the berg.
this year the place where these bergs calve has changed even more. The connection between the continent and the offshore islands which had a permanent bridge is now broken and it was about 2000 feet thick at the thinest.
People like you believe, generally, that these are just anomalies that cycle occasionally over hundreds of years.
As an packer type explorer in the North, I have chatted with those who have observed for these several hundred year intervals. They pass the oral hitory don and scientists follow the fisheries. While exploring I got to see the fish whose DNA is tracked. currently some of the population travel a 150 mile route and others go over 1500 miles by habit. What caused their choice to appear happened in 1732, the year of washington's birth. A glacier moved. One of those things that calve icebergs. It moved again and the old path was reopened giving two choices.
A series of changes was used to see trends that are not reversable.
You may not be a professional explorer hired by various nations or the united Nations. I was and there was a purpose. Long range planning primarily.