Via LLRX – It’s losing ice faster than forecast and now irreversibly committed to at least 10 inches of sea level rise – Alun Hubbard is a field glaciologist who has worked on ice sheets for more than 30 years. The past few years in particular have been unnerving for the sheer rate and magnitude of change underway. Current teachings that ice sheets respond over millennial time scales is definitely not what we’re seeing today. If every year were like 2012, when Greenland experienced a heat wave, that irreversible commitment to sea level rise would triple. That’s an ominous portent given that these are climate conditions we have already seen, not a hypothetical future scenario.