BLOGGER'S NOTE: there seems to be a change in northern Greenland -- will be posting before and after photos. Please click on the image to enlarge it. Notice what appear to be examples of cloud gravity waves (are they altostratus undulatus clouds? Somebody please correct me if I am saying this incorrectly) in the southern portion of the vortex over Alaska.



Link to updated images: http://www.weatheroffice.gc.ca/data/satellite/hrpt_dfo_ir_100.jpg

And, just for fun (since this climate change stuff is not so very humorous), here is a youtube video of some cloud gravity waves:

Link: http://www.youtube.com/watch?v=yXnkzeCU3bE