Spring is in the air in Antarctica, and NASA scientists are keeping a close watch on a huge crack in the Pine Island Glacier that's looking ready to pop. If (or when) it calves, it will produce an iceberg the size of New York City - the largest sea level rise contributor from Antarctica, according to NASA's Dr. Kelly Brunt.
Antarctic glaciers do this sort of thing every now and then, so that's not what makes this particular break interesting. As Brunt explains in the new video below, if cracking glaciers can be compared to breaking fingernails, this Pine Island crack is like a nail that has broken below the white - back where shouldn't break and where it really hurts. She explains it well for NASA's Operation IceBridge:
This Pine Island Glacier event might seem to somheow contradict recent reports of record sea ice extent around Antarctica. This information has been misused by climate science denialists to argue that while the Arctic is warming and losing sea ice, it's okay because the Antarctic is making up for it. Wrong. Here's the real story from the National Snow and Ice Data Center. I have highlighted the key parts: