How do scientists use carbon dating

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* This graph is called the “hockey stick graph” because the curve looks like a hockey stick laid on its side (click on footnote for graphic illustration).[92] The red part of the curve represents modern instrument-measured surface temperatures, the blue represents proxy data, the black line is a smoothed average of the proxy data, and the gray represents the margin of error with 95% confidence.[93] [94] * This graph has been the subject of disputes in scientific journals,[100] [101] congressional hearings,[102] [103] and legal proceedings including a Freedom of Information Act lawsuit.[104] [105] Just Facts presently does not have the resources to conclusively assess all the competing claims on this issue, but the facts we have verified are as follows: medieval warmth, and shows the following graph of temperature changes for the Northern Hemisphere over the past 1,300 years.

This graph, which is called a spaghetti graph, is constructed with data from 12 proxy studies spliced with instrument-measured surface temperatures (the dark black line): * Click here for facts about the IPCC’s practice of splicing proxy studies with instrument-measured surface temperatures.

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One of these was a series of buoys, each containing thermometers located ten feet above the water and at one foot below the water.

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