Climate 411

Blogging the science and policy of global warming

Posts from May 2008

A Decade of Cooler Temperatures?

Lisa MooreThis post is by Lisa Moore, Ph.D., a scientist in the Climate and Air program at Environmental Defense Fund.

An article in this week’s Nature predicts that Europe and North America will cool slightly over the next decade. No, this doesn’t mean that global warming has stopped.

The new paper describes a climate model that makes short-term (decadal) predictions based on ocean dynamics. The decade-long cooling is just a temporary offset to warming from human activity. After it passes, temperatures will begin climbing again. By 2030, the model forecasts the same global temperatures as the IPCC.

Climate Bill Vote: 10 Senators to Watch

Sheryl CanterThis post is by Sheryl Canter, an online writer and editorial manager at Environmental Defense Fund.

The Lieberman-Warner Climate Security Act is scheduled for Senate debate and vote the first week in June. We’re closer than we’ve ever been to passing legislation but we still have a long way to go (see our previous post, How a Bill Moves Through Congress).

The next month will be crucial, as we talk to senators who are still on the fence. Many are leaders whose management skills will be put to the test.

Who are they? Read our 10 Senators to Watch page to find out.

CO2 and Methane Rose Sharply in 2007

Lisa MooreThis post is by Lisa Moore, Ph.D., a scientist in the Climate and Air program at Environmental Defense Fund.

Atmospheric CO2 is rising at an accelerating rate over time.Last week, NOAA released some disheartening numbers: both CO2 and methane increased sharply last year. Growth rates are increasing (see graph to the right).

The CO2 numbers weren’t a surprise. A paper with similar findings was published last November by a team that included a NOAA scientist. I wrote a blog post summarizing the study, which analyzed the reasons behind the trend (see Rise of Atmospheric Carbon is Accelerating).

The methane numbers, however, were disturbing. Until this year, methane levels have been essentially unchanged since 1998.

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