Articles by Joseph Romm

Hansen gives a talk in Iowa about climate change impacts

Hansen writes faster than I can blog. He has posted a "talk given at Des Moines last Sunday, with description of Declaration of Stewardship slightly edited for clarity." He talks about the "three major consequences of global warming, if we go down the business-as-usual path, with fossil fuel use and greenhouse gas emissions continuing to increase":

More thoughts on how sea level will be influenced by global warming

Hansen has posted some important thoughts about sea level rise on his website. In particular, he has shortened his "Scientific reticence and sea level rise" paper and New Scientist has published it. The key conclusion:

[I]ce sheets will respond in a non-linear fashion to global warming --- and are already beginning to do so. There is enough information now, in my opinion, to make it a near certainty that business-as-usual [emissions] scenarios will lead to disastrous multi-metre sea level rise on the century time scale.

This leads directly to his emissions strategy:

The global community must aim to restrict any further global warming to less than 1°C above the temperature in 2000. This implies a CO2 limit of about 450 parts per million or less. Such scenarios require almost immediate changes to get energy and greenhouse gas emissions onto a fundamentally different path.

Hansen also offers some useful thoughts about recent research on Greenland, and has been misunderstood by the media.

More evidence of the link to climate change

The weather is getting more extreme thanks to human-caused climate change (as I've pointed out many times, see here, here, and here).

Now the World Meteorological Organization reports more evidence:

In January and April 2007 it is likely that global land surface temperatures ranked warmest since records began in 1880, 1.89°C warmer than average for January and 1.37°C warmer than average for April. Several regions have experienced extremely heavy precipitation, leading to severe floods. The Fourth Assessment Report of the WMO/UNEP Intergovernmental Group on Climate Change (IPCC) notes an increasing trend in extreme events observed during the last 50 years. IPCC further projects it to be very likely that hot extremes, heat waves and heavy precipitation events will continue to become more frequent.

The question must be asked

The thought didn't cross my mind until my Minneapolis-based brother suggested it. I had asked him for his thoughts on the collapse, and that is the question he posed.

I was skeptical at first, but after doing a Google search -- and after NBC reported Sunday that National Transportation Safety Board investigators are "looking at everything" including "the weather" -- I think it is a legitimate question to ask.

First, though, why is it an important question to ask? NASA's James Hansen says we are on the verge of turning the earth into "a different planet," thanks to uncontrolled greenhouse-gas emissions. We've seen the Brits and Chinese link recent flooding tragedies driven by extreme weather to climate change.

We are all facing far more extreme heat waves, floods, wildfires, rainstorms, droughts and hurricanes -- yet our infrastructure apparently can't handle the weather we have today, as Hurricane Katrina revealed. If we don't adopt aggressive actions to prevent catastrophic climate change, we need to seriously climate-proof our electric grid, our levees, and our water and sewage systems.

The question remains, do we need to climate-proof our bridges? Does a connection exist between climate change and the collapse of the I-35W bridge? Consider what a meteorologist who worked in the city for years blogged: