Not exact matches
The climate change «
hockey stick» is a
graph first published in 1998 by Michael Mann et al. that attempted to
reconstruct the mean surface temperature on the planet during the period A. D. 900 to the present, using multiple proxies, such as tree rings, to measure temperatures before formal instrumentation was in use.
The original
hockey -
stick analysis plotted
reconstructed Northern Hemisphere mean temperature variations since 1400 and found that since 1900, temperatures have increased to give the
graph its distinctive shape (Nature 1998, 392, 779 - 787).
«Several months ago I compiled a chart of glacier retreats and advances over the last 3000 years and
graphed over it the
Hockey stick and
reconstructed CET to 1538.