Recent data suggest that the oceans have cooled slightly in recent years. But this doesn’t necessarily imply that the planet is not warming. Instead, it illustrates how poorly we understand the deep oceanic thermal environment – we don’t know where the heat that should be there is going.
Apparently we still don’t understand cloud cover is terms of net planetary temperature. We don’t know how quickly oceans can radiate heat into space. We don’t know what’s happening, and at a time when we really need some help from our models.
For a long time Antarctica has been thought to be cooling over time, and this has confounded some of the science of global warming, as well as providing easy ammunition to those who require declaratory yes/no answers to the questions of climate change.
In 2007 the United Nations Intergovernmental Panel on Climate Change stated that “Current global model studies project that the Antarctic ice sheet will remain too cold for widespread surface melting and is expected to gain in mass due to increased snowfall.”
Now it appears that Antarctica has been warming all along, as a recent paper from Nature (subscription required) shows:
Here we show that significant warming extends well beyond the Antarctic Peninsula to cover most of West Antarctica, an area of warming much larger than previously reported.
- Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year
Joe Romm at Climate Progress has been on top of this for a long time, and last month wrote a penetrating summary:
The AP reports on new data to be presented today at the annual meeting of the American Geophysical Union:
More than 2 trillion tons of land ice in Greenland, Antarctica and Alaska have melted since 2003, according to new NASA satellite data that show the latest signs of what scientists say is global warming.
This staggering ice loss is all the more worrisome because it was not predicted by the IPCC’s climate models. As Penn State climatologist Richard Alley said in March 2006, the ice sheets appear to be shrinking “100 years ahead of schedule.†In 2001, the IPCC thought that neither Greenland nor Antarctica would lose significant mass by 2100. They both already are.
- Two trillion tons of land ice lost since 2003, rate of Greenland summer ice loss triples 2007 record
He offers as his final word in this latest story on the Nature report:
So notwithstanding the amateur meteorologist-deniers who sometimes comment on this blog and elsewhere about how cold it is outside right now, the whole damn planet is warming and melting — even in places that are much, much colder than anywhere in the continental United States.
- Antarctica has warmed significantly over past 50 years, revisited
In many ways the Earth is still a great mystery to us, it seems. But whether it has been the stranger to us or whether we have been the stranger here, is another question. The lesson here is to slow down in our explanations, and speed up with our solutions. We don’t have the models to show us exactly what’s happening and how. All we have is the damage occurring before our bewildered eyes.