On the same day that we learned about a protective ice bridge in West Antarctica breaking off from an ice shelf the size of Jamaica, leaving the shelf in peril, scientists also reported more bad news to our north in the Arctic Sea. There, the thickness of sea ice this winter reached "a record wintertime low of just 378,000 square miles this year, down 43 percent from last year," according to Walt Meier, a scientist at the National Snow and Ice Data Center.
These two events, indicating problematic warming in both our northern and southern ice cover, will both have the ultimate effect of accelerating warming as sea ice melts into the ocean and the surface of the planet gets darker and less reflective.
Clearly the planet is not responding politely to being in the greenhouse danger zone of 387 parts-per-million of CO2, but inaction will only lead to greater planetary heating and natural feedback mechanisms will take over and accelerate it further.