Clear Evidence of Global Warming

FredHayek wrote: But a long period of record low temps eventually does add up to climate. You say the Right is looking too short term, but some of the Right thinks the Left is looking too short term. 20 years of increasing temps is too small of a sample to consider, and since we haven't had detailed worldwide temperature measurement for more than a couple centuries, it can be hard to make a long term guess.

I think that's backwards FH. tongue:

http://motherjones.com/kevin-drum/2012/ ... ng-edition
Lying With Charts, Global Warming Edition
—By Kevin Drum
| Sun Jan. 29, 2012

Look! No warming trend! But do you see the problem? I've given you a hint by embedding the 1997-2011 data within a larger chart, instead of just producing it on its own, as the Mail did. But in case you need a bigger hint, click the link for the full set of data, not cherry-picked to begin with the huge El Niño spike of 1998.

Hey look! The warming trend is back!

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CritiKalbILL wrote: How many years have we been recording accurate earth temps and how old is the earth? I just don't trust that people can make accurate conclusions from a microscopic blip of time.

http://earthobservatory.nasa.gov/blogs/ ... rming-now/
If Earth has warmed and cooled throughout history, what makes scientists think that humans are causing global warming now?
By Rebecca Lindsey May 4, 2010

Paleoclimate data show that atmospheric carbon dioxide levels are higher than they have been in the past 800,000 years. There is no plausible explanation for why such high levels of carbon dioxide would not cause the planet to warm.

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CO2 and (Antarctic) temperatures overlapped for past 800,000 years.
http://www.realclimate.org/index.php/ar ... p-and-co2/

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Another comparison of CO2, CH4, and N2O concentrations for the last several hundred thousand years compared to proxy temp measurements from ice and ocean cores. Do you see the pattern?
http://www.geolsoc.org.uk/gsl/pid/8827; ... 4FCEC22911
The Relationship Between CO2 and Temperature

Figure 1: Oxygen isotopes (grey) are from deep sea cores and show global change in temperature and ice volume from ocean bottom waters; deuterium isotopes (black), from ice in the EPICA Dome C ice core, are a proxy for Antarctic surface temperatures, which changed by 9 degrees C between glacial and interglacial periods, and which match the deep ocean record; CH4 (blue), CO2 (red), and N2O (green) are gases extracted from bubbles in the EPICA Dome C ice core (subsequently extended back with similar results to 800,000 years). The red, blue, and green stars at top right show where the modern levels of these gases lie, well above the natural envelope of the past 800,000 years (Source, IPCC 2007, Working Group 1, Figure 6.3, page 444).
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http://www2.sunysuffolk.edu/mandias/glo ... gases.html
Global Warming: Man or Myth?
Impact of Greenhouse Gases

At 2 ppm rise per year, humans are increasing CO2 at a rate that is about 80 times that of the fastest natural rate and almost 2000 times the average rate over the past hundreds of thousands of years!

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http://www.ncdc.noaa.gov/indicators/
Global Climate Change Indicators

This page presents the latest information from several independent measures of observed climate change that illustrate an overwhelmingly compelling story of a planet that is undergoing global warming. It is worth noting that increasing global temperature is only one element of observed global climate change. Precipitation patterns are also changing; storms and other extremes are changing as well.