Massive Iceberg Snaps Off Greenland--But What Does It Mean?
August 10, 2010

Yesterday, a massive ice island four times the size of Manhattan snapped off of Greenland's Petermann Glacier. Ominous, no? A disturbing sign of a warming planet? Well… actually, it's hard to say. It's true that, in a broad sense, Greenland has been losing ice faster than it has been accumulating snow in recent years. The thing's clearly melting. But linking this one specific glacier calving to global warming is more difficult, and something many glaciologists are reluctant to do.

The Oddities Of Sea-Level Rise
March 24, 2010

The way we're warming the planet, we can probably expect sea levels to rise at least a meter, on average, by the end of the century. That's what most scientific projections suggest, anyway. One kink, though, is that that's just an average—the seas won't go up uniformly by one meter all across the globe. Some places will see much higher rises than that, some places much lower. Michael Lemonick has a great Environment360 piece delving into some of the factors that make sea-level rise so odd and unpredictable.

Why Antarctica's Not Melting As Much (For Now)
January 08, 2010

Here's a handy animated map from NOAA showing all the places on the planet where it's unseasonably warm and unseasonably cool right now. Curiously, the freak cold seems to be occurring everywhere major media centers are located—the northeastern United States, Europe, Japan—so the chilly weather's grabbing all the headlines. But it's anomalously warm just about everywhere else in the world, especially the Arctic. (For more on the overall trends, see Joe Romm's post.) Oh, there's one other big exception: It seems to be anomalously cold in Antarctica right now.

Earth to Obama
October 01, 2009

Bill McKibben: You can't negotiate with the planet.

Meet The Beetles
August 20, 2009

One of the quirks of global warming is that average temperatures in the polar regions are rising a lot faster than they are in the rest of the world. (See here for an explanation.) That's not exactly reassuring, since a lot of the climate impacts we care about, especially the melting of Greenland and Antarctic glaciers and the potential release of methane gas from the tundra, will occur in exactly those areas.

The Greatest Dying
September 24, 2007

A fate worse than global warming.

Unbearable Whiteness
December 26, 1988

In this 1988 dispatch from Antarctica, Al Gore warns about climate change and the cost of political inaction.