Update on my earlier suggestions about big lumps of ice in the Antarctic. Take a look on the right hand side of yesterday's AMSR2 image. Around 80E, 62S: I can't find the satellite imagery yet, but if we are to believe the picture, there's a HUGE chunk of ice (I don't know how thick, continuous or potentially persistent it might be) free-floating there. If this was a single entity iceberg it would be hundreds of miles across. I don't think it is likely to be so. Looking closely around the coastline nearby, more big chunks are likely to be liberated shortly.
I don't think there's any risk associated with these at the moment, I just find them interesting. There's probably precedent, too, but I'm too lazy to go check.