Climate Change Data (roll curser over pic, go to "Full Gallery")

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GissNasaTemp2009.gif
The earth IS warming. The temperature trend since 1980 is clearly upwards, with some irrelevant fluctuations. This is Global Warming. This graph is the global temperature anomaly data since 1880, from GISS NASA. The year 2009 was the second hottest. Click on the image for full size view.
Temp since 700 IPCC Vol 1, fig-6-10.jpg
The earth IS warming. Note relative to the present high and increasing temperature, no exceptional global "medieval warm period" exists. The middle graph shows Northern Hemisphere temperature reconstructions for the last 1,300 years, from the 2007 IPCC science report. Click on the image for full size view.
CO2 Methane NO last 10000 yrs SPM1.jpg
CO2 and other gases over last 10,000 years. The recent spike in CO2 is unprecedented. Scientific consensus says this spike is due to humans and that it is responsible for observed global warming since 1975.

The UU-UNO Climate Portal posts reliable data relevant to climate change and global warming. Click HERE for more information.

Here are the most important data:

1. Graphic below: Global average temperature data since 1880 from GISS NASA.

Note that the global average temperature since 1980 has a definite upward trend. This is the definition of recent global warming. Fluctuations around this upward global warming trend are also present. In particular, 1998 had a high temperature due to a huge El Nino heating effect superimposed on the global warming trend. El Nino which heats the earth (and its counterpart La Nina which cools the earth) produce fluctuations that obscure but do not hide the upward trend due to man-made global warming. The GISS/NASA data have 2010 tied with 2005 as the hottest year. 2009 is next tied with 1998 and several other years.