Climate 411

Ozone Alert For Plants

The author of today’s post, Lisa Moore, Ph.D., is a scientist in the Climate and Air Program.

If you’re in or near a big city, you’ve probably heard your local news give ozone alerts. Those warnings mean that smog levels are high enough to affect your lungs. Even moderate pollution causes respiratory problems for kids with asthma. Really high levels of ozone make it dangerous for even the healthiest adult to be outdoors.

Now scientists are warning that smog could make global warming worse because of its effects on plants.

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Posted in Plants & Animals / Read 1 Response

Scientific Uncertainty

The author of today’s post, Lisa Moore, is a scientist in the Climate and Air Program.

I’ve been reading a great book called Uncertain Science… Uncertain World by Henry Pollack – a readable and engaging discussion of decision-making in the face of uncertainty. Pollack argues that decision-makers use uncertainty as an excuse for inaction, when in fact it should be a stimulus for creativity and progress.

How sure do you have to be that something will happen to act on the possibility?

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Posted in News / Read 4 Responses

Global Warming from Soot

The author of today’s post, Lisa Moore, is a scientist in the Climate and Air Program.

Most people don’t realize it, but "black carbon" or soot – the same stuff that dirties up chimney flues and car mufflers – is a significant contributor to global warming. Today’s best estimates place it next in line behind the greenhouse gases CO2 and methane (see Table 2.13 in the IPCC report).



Soot particle under a microscope. Credit: D.M. Smith, University of Denver.

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Posted in Arctic & Antarctic / Read 5 Responses

Climate Models: How Good Are They?

The author of today’s post, Lisa Moore, is a scientist in the Climate and Air Program.

Stephen Colbert once quipped, "It’s not that I don’t believe in climate change, it’s that I don’t believe in climate. Have you ever heard anyone say, "How’s the climate?" No! They say, "How’s the weather?""

People often confuse climate and weather. They wonder how scientists can reliably predict climate 50 years from now when they can’t predict the weather a few weeks from now. The answer is that climate and weather are different, and it’s easier to predict climate than weather.

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Posted in News / Read 3 Responses

Swindles in the “The Great Global Warming Swindle”

The author of today’s post, Lisa Moore, is a scientist in the Climate and Air Program.

In March of this year, British TV Channel 4 aired a 72-minute diatribe called "The Great Global Warming Swindle". The program is filled with old data, data taken out of context, data misattributed, and general misinformation, and at the time it aired we thought it not worth responding to.

But people keep mentioning it, so here are the program’s main arguments and why they’re wrong. Now the next time someone brings this up, you’ll have the facts to give them.

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Posted in News / Read 8 Responses

Climate News: Solar Excuses, Stormy Reefs and Drying Ponds

The author of today’s post, Lisa Moore, is a scientist in the Climate and Air Program.

This week’s scientific journals brought three interesting stories about climate change. The first is a sneak peek at an upcoming paper about global warming and the Sun. The second talks about an unexpected environmental benefit of hurricanes, and the third reports that climate change is drying up important biodiversity hotspots in the Arctic.

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Posted in News / Read 5 Responses