Northern hemisphere non-Arctic sea ice
Posted by Jeff Id on February 1, 2012
Satellite sea ice measurements are comprised of terabytes of data over decades of time and multiple instruments. The literature on the topic is incomplete for those of us who don’t live in the field, yet far better than anything that paleomagicology has ever produced. In my recent sea ice work, I’ve taken the time to correct for leap years in the trend and spent a lot of time insuring that the calculations are accurate. I really want to understand what is happening to cause the melting of the Arctic and growth of the Antarctic and believe I am coming close. I used FileZilla to download all of the EASE grid sea ice data from the NSIDC. If you want the link, send an email and I will give you instructions. We don’t want to download gigabytes of ice data if we are not serious about study.
Anthony Watts was curious about the ice trends above and below the Arctic Circle. It seems reasonable that a large percentage of ice loss would happen at lower latitudes if global warming is the cause of the loss. Contrary to my own theory that warm waters were pushed into the pole, it seems that this general warming is in fact the cause. The jury is not out yet, but IMO the fat lady’s tummy is visible. :D So here are some of the plots I’ve generated:
I’m not at all comfortable with the steps in maximum ice considering that the max ice is constrained by land mass.
Consider that the total ice area is this:
The ice anomaly below the Arctic is:
This plot seems to have an artificial step at 1995. There is a significant satellite switch at that point but I haven’t had time to fully research it. Despite my fondness for the massively funded Sea Ice group, I don’t believe right now that it is a non-issue. Long time readers will remember the step in the UAH RSS data.
I’m tired again, hopefully this is enough to start some thought. MUCH more of this has been done and will be posted in greater detail.