Gore: That's my story and I'm stickin' to it

Al Gore's Journal : Hockey Stick

Contrary to what the skeptics and deniers will tell you, the Hockey Stick graph, similar to the one I featured in "An Inconvenient Truth", is proving to be completely true.

Basically the graph shows the temperatures remain consistent for 1,000 years, and then, when the industrial revolution took place, temperatures spiked. A number of research groups have produced records of temperatures of centuries before thermometers were in use using the growth patters of corals and trees, temperature changes in boreholes, ice cores and sediments.

According to researcher Mike Mann in an interview with the BBC, "Ten years ago, the availability of data became quite sparse by the time you got back to 1,000 AD, and what we had then was weighted towards tree-ring data; but now you can go back 1,300 years without using tree-ring data at all and still get a verifiable conclusion." The results were reported in the Proceedings of the National Academy of Sciences.

Note that Gore continues to deny the inconvenient existence of both the Medieval Warm Period and the Little Ice Age.

From the alarmist book "Censoring Science"--the IPCC imagines that the alleged human warming signature showed up a century or two after than the dawn of the Industrial Revolution:

...the IPCC's third assessment report would note that the human signature on climate change first became discernible sometime between 1975 and 1980.

I think it's fascinating that the IPCC "saw" the human signature specifically at that time, right when the PDO shifted to a warm phase.