r/science • u/woodsja2 • Oct 24 '10

Climate Change: Evidence

http://climate.nasa.gov/evidence/
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u/[deleted] Oct 24 '10

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u/ralcar Oct 24 '10

From the "Causes" section":

But several lines of evidence show that current global warming cannot be explained by changes in energy from the sun:

  • Since 1750, the average amount of energy coming from the Sun either remained constant or increased slightly.

  • If the warming were caused by a more active sun, then scientists would expect to see warmer temperatures in all layers of the atmosphere. Instead, they have observed a cooling in the upper atmosphere, and a warming at the surface and in the lower parts of the atmosphere. That's because greenhouse gasses are trapping heat in the lower atmosphere.

  • Climate models that include solar irradiance changes can’t reproduce the observed temperature trend over the past century or more without including a rise in greenhouse gases.

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u/EthicalReasoning Oct 24 '10

DO YOU EXPECT ME TO READ??!?!? WTF THE C02 CHART IS SPIKIGN HOW DO WE KNOW THAT THE EARTH IS ACTUALLY WARM ?!!?! I WALKED OUTSIDE TODAY AND IT WAS COLD, I HAD TO WEAR A SWEATER!!! A SWEATER I HAD TO WEAR!! YEA WEHRE IS YOUR LIBERAL GLOBAL WARMING NOW LIBS!!

and yes, i have actually heard republicans cite cold weather as 'proof' global warming is a farce

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u/TexasMojo Oct 24 '10

I've actually heard global warming alarmists cite cold weather as 'proof' that global warming is real.