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Old 05-07-2015, 03:00 PM
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WTG Humans! We Made It to 400 PPM!

Greenhouse gas benchmark reached

Well, that certainly took long enough. Can 500 ppm be on the horizon . . . errr . . . everywhere?

“It was only a matter of time that we would average 400 parts per million globally,” said Pieter Tans, lead scientist of NOAA’s Global Greenhouse Gas Reference Network. “We first reported 400 ppm when all of our Arctic sites reached that value in the spring of 2012. In 2013 the record at NOAA’s Mauna Loa Observatory first crossed the 400 ppm threshold. Reaching 400 parts per million as a global average is a significant milestone.

“This marks the fact that humans burning fossil fuels have caused global carbon dioxide concentrations to rise more than 120 parts per million since pre-industrial times,” added Tans. “Half of that rise has occurred since 1980.”
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Old 05-07-2015, 04:33 PM
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Are you suggesting the following are not scientifically accurate statements:

Climate changes are not driven by CO2.

Air pollution has nothing to do with CO2.

Human-produced CO2 is a miniscule fraction of a percentage of greenhouse gases.

96.5% of all greenhouse gases emit from the oceans, naturally.

The small amount of CO2 produced by humans is wholly beneficial to the planet.

Without CO2, vegetation dies, herbivores die, you die.

CO2 levels used to be much higher many times in the past.

Higher temperatures from the sun result in CO2 levels rising long afterwards.

Rising CO2 is an effect of global warming, not a cause.

Global warming and cooling is a purely natural phenomenon.

The higher the CO2 levels in the atmosphere, the greener our planet becomes.

Forests and plant life growth has increased by approx 40% over the last 50 years, thanks to CO2.

Increasing CO2 yields larger food crops. This is beneficial to a growing population.

The Earth is not currently warming, it is in fact cooling.

Temperatures in the past have often been much warmer than today.
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Old 05-07-2015, 08:18 PM
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Gunny, you're ****ing up the narrative.
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Old 05-07-2015, 08:30 PM
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So, there's no harm when our planetary closed system terrarium tries to regain equilibrium? Oh great, now I don't have to worry.

https://www.youtube.com/watch?v=eBzfZuLihRE
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Old 05-07-2015, 08:35 PM
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Link broke MTI.

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Old 05-07-2015, 10:29 PM
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Quote:
Originally Posted by MTI View Post
So, there's no harm when our planetary closed system terrarium tries to regain equilibrium? Oh great, now I don't have to worry.

https://www.youtube.com/watch?v=eBzfZuLihRE

Quote:
DURHAM, N.C. – A new study based on 1,000 years of temperature records suggests global warming is not progressing as fast as it would under the most severe emissions scenarios outlined by the Intergovernmental Panel on Climate Change (IPCC).
“Based on our analysis, a middle-of-the-road warming scenario is more likely, at least for now,” said Patrick T. Brown, a doctoral student in climatology at Duke University’s Nicholas School of the Environment. “But this could change.”
Quote:
The team examined whether climate models, such as those used by the IPCC, accurately account for natural chaotic variability that can occur in the rate of global warming as a result of interactions between the ocean and atmosphere, and other natural factors.

To test how accurate climate models are at accounting for variations in the rate of warming, Brown and Li, along with colleagues from San Jose State University and the USDA, created a new statistical model based on reconstructed empirical records of surface temperatures over the last 1,000 years.

“By comparing our model against theirs, we found that climate models largely get the ‘big picture’ right but seem to underestimate the magnitude of natural decade-to-decade climate wiggles,” Brown said. “Our model shows these wiggles can be big enough that they could have accounted for a reasonable portion of the accelerated warming we experienced from 1975 to 2000, as well as the reduced rate in warming that occurred from 2002 to 2013.”
https://nicholas.duke.edu/news/global-warming-more-moderate-worst-case-models
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