Climate 411

Storms May Be Fewer, But Still More Fierce

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

Last week, scientists published a study about global warming and hurricanes in the U.S. The authors found a weak downward trend in the number of landfalling U.S. hurricanes, but concluded that future trends will depend on the spatial distribution of ocean warming.

In its coverage of the study, the Miami Herald said that "global warming actually is diminishing the number of hurricanes that strike Florida and the rest of the United States – and the phenomenon is likely to continue." This is not exactly what the study said. Here’s the full scoop.

Atlantic Hurricanes
Atlantic hurricane tracks, 1980-2005.

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Posted in Extreme Weather / Comments are closed

Antarctic Ice: Growing or Shrinking?

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

On January 13, Nature Geoscience published an article that reports large increases in ice loss from West Antarctica over the past 10 years. It’s a sobering result that’s in line with earlier, independent studies.

But then why do some people say that Antarctic ice is growing?

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Posted in Arctic & Antarctic / Read 7 Responses

Fun with Maps

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

Here’s an interesting way to look at greenhouse gas emissions. The WorldMapper project has assembled hundreds of global maps in which nations are resized according to different variables – for example, total population and carbon emissions:

WordMapper - Population
From WorldMapper. Reproduced with permission.

WorldMapper - Emissions
From WorldMapper. Reproduced with permission.

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Posted in What Others are Saying / Comments are closed

Global Warming Science 2007: Ten Top Stories

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

All year long we’ve been monitoring developments in climate science, and posting about the important new developments. I thought now would be a good time to look back over 2007 and summarize what we’ve learned.

Here are ten noteworthy science stories we covered in 2007:

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Posted in News / Read 6 Responses

The Global Warming in the Pipeline

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

A common refrain here on Climate411 is that we need to cut greenhouse gas emissions as soon as possible. One of the reasons we’ve cited numerous times is that, even if we could stabilize greenhouse gas concentrations at today’s levels, some global temperature increase is already locked into the system. This is sometimes called the “warming commitment” or the “warming in the pipeline”.

What’s behind this phenomenon? The short answer is: water, water everywhere.

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Posted in Basic Science of Global Warming / Read 10 Responses

IPCC's Final Words: Reduce Emissions

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

This past week, IPCC’s Nobel Prize-winning scientists met in Valencia, Spain to write a synthesis of their three-volume report. The Summary for Policymakers of the Synthesis Report [PDF] makes it very clear that we need to act immediately to avoid the worst effects of global warming.

IPCC Chairman Dr. Rajendra Pachauri summarized the main message as follows: “Climate change is a serious threat to development everywhere. Today, the time for doubt has passed. The IPCC has unequivocally affirmed the warming of our climate system, and linked it directly to human activity. Slowing or even reversing the existing trends of global warming is the defining challenge of our age.”

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Posted in News / Read 1 Response