CO2 Levels Reach 400ppm at Mauna Loa For First Time On Record

Titus Andronicus writes "Today, NOAA reported, 'On May 9, the daily mean concentration of carbon dioxide in the atmosphere of Mauna Loa, Hawaii, surpassed 400 parts per million for the first time since measurements began in 1958.' For comparison, over the last 800,000 years, CO2 has ranged from roughly 180 ppm to 280 ppm. 'For the entire period of human civilization, roughly 8,000 years, the carbon dioxide level was relatively stable near that upper bound. But the burning of fossil fuels has caused a 41 percent increase in the heat-trapping gas since the Industrial Revolution, a mere geological instant, and scientists say the climate is beginning to react, though they expect far larger changes in the future.' The last time Earth had 400 ppm was probably more than 3 megayears ago."

Comments

Re:Stop breathing

[Bill, Shooter of Bul]

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Re:CO2 at an active volcano? Who wudda thot?

[mbeckman]

"The "suspicion" of CO2 as a warming agent is based on the physics of CO2, specifically its property of absorbing infrared radiation which is easily measured in the laboratory. Why would you think it wouldn't do the same thing in the atmosphere or what is it in the Earth system that negates the effect?"

Because a laboratory is not an atmosphere. It doesn't contain all the factors that affect surface temperature, such as clouds, for example, which increase the albedo of the earth, and are a much larger factor in temperature change than CO2. In fact, the climate warmists acknowledge that the actual heat directly generated by infrared radiation of CO2 is inconsequential. They had to invent the "positive water vapor feedback" amplifier to give CO2 actual warming power. That theory has only been "proven" by computer modeling, which is widely recognized to be completely inadequate to the problem at hand.