Greenland’s Melting Ice Is No Cause for Climate-Change Panic

The annual loss has been decreasing in the past decade even as the globe continues to warm

By Steven E. Koonin. Excerpts:L

"the amount of ice that Greenland has lost every year since 1900, averaged over 10-year intervals; the annual loss averages about 110 gigatons. (A gigaton is one billion metric tons, or slightly over 2.2 trillion pounds.) That is a lot, but that water has caused the planet’s oceans to rise each year by only 0.01 inch, about one-fifth the thickness of a dime."

"Since human warming influences on the climate have grown steadily—they are now 10 times what they were in 1900— you might expect Greenland to lose more ice each year. Instead there are large swings in the annual ice loss and it is no larger today than it was in the 1930s, when human influences were much smaller. Moreover, the annual loss of ice has been decreasing in the past decade even as the globe continues to warm. While a warming globe might eventually be the dominant cause of Greenland’s shrinking ice, natural cycles in temperatures and currents in the North Atlantic that extend for decades have been a much more important influence since 1900. Those cycles, together with the recent slowdown, make it plausible that the next few decades will see a further, perhaps dramatic slowing of ice loss."