Unsettled: What Climate Science Tells Us, What It Doesn’t, and Why It Matters

by Steven E. Koonin

So it’s reasonable to expect that the rate will decline again during the next few decades. The average rates projected by the IPCC, on the other hand—even the low RCP2.6 rate of 5.5 mm/yr—would be so unusually high that they would fall outside the scale of this chart. The next few decades will tell.