Tag Archives: carbon dioxide

Research Suggests Climate Models Underestimate Climate Sensitivity

New research into cloud formation suggests increased climate sensitivity

Climate models are wrong? Climate models are mathematical representation of an enormously complex system. They are intended to project trends, not predict events. They are an imperfect but indispensable tool to gain an understanding of what we can likely expect in the future. Casting doubt on the reliability of climate models is a common theme among climate skeptics who commonly claim that models are not accurate – and …

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CO2 Levels Reach and Maintain 400 PPM – A Dubious Milestone in Human History

CO2 levels on the rise - reach 400 ppm for April in Northern Hemisphere

The World Meteorological Organization reports that, for the first time in human history, atmospheric concentrations of carbon dioxide (CO2) eclipsed 400 parts-per-million (ppm) in the northern hemisphere for the entire month of April.CO2 concentration varies with the seasons, generally reaching their highest level early in the northern hemisphere’s spring before seasonal intake of CO2 from vegetation. The first recording of 400 ppm occurred briefly in the …

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Shocking New NASA Report Shows CO2 Cools the Atmosphere: Anatomy of a Climate Denial Troll Campaign

climate denial troll - "shocking new study" is just a press release on well-established science

Science is so hard… A recent post on our Facebook page claims there is a “new study” showing that carbon dioxide acts as a coolant in the atmosphere. Our Facebook poster, we’ll call him “Adam” (because that’s his name), is confident he’s unearthed this new pearl of knowledge that blows centuries of science on CO2 aside. I assume this now means without the naturally occurring …

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Video Friday: Temperature Leads CO2? The 800-Year Lag

Potholer54 (a.k.a Peter Hadfield) tackles a common myth about climate change often called the “800-year lag.”  Antarctic ice core data shows CO2 lagging temperature during periods of deglaciation; this has been well understood for decades. Despite this, many climate change “skeptics” ignore the full picture of numerous studies over the years and assert these data of ancient deglaciation “proves” that CO2 does not cause global …

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COP 18: Bridging the Gulf between Science and Reality

Scientists and organization from around the world warn that the door is quickly closely for the chance to avert a climate catastrophe

In theory the slew of recent climate studies should inspire the delegates that have assembled for the 18th Conference of the Parties (COP 18). In practice the 194 nations that are meeting in Doha, Qatar, are getting bogged down by the same old arguments. The consensus once again this year appears to be that nothing will be accomplished. The United Nations Framework Convention on Climate …

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EarthTalk: Atmospheric CO2 – Is it Too Late Anyway?

The amount of carbon dioxide (CO2) in the atmosphere today is roughly 390 parts per million (ppm), well above the 275 ppm it was before we started pumping pollution skyward during the Industrial Revolution. Climate scientists and green leaders today agree that 350 ppm would be a tolerable upper limit.

EarthTalk® is a weekly environmental column made available to our readers from the editors of E/The Environmental Magazine Dear EarthTalk: I read that CO2 in our atmosphere is now more than 300 parts per million. Doesn’t this mean that we’re too late to avoid the worst impacts of climate change?  — Karl Bren, Richmond, VA Actually the amount of carbon dioxide (CO2) in the …

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