When all the PAGES2k data is composited together, it is consistent with a very large body of literature - a long-term cooling trend until the 19th century, after which an abrupt warming takes place. The blue shading represents the uncertainties.
Media releases, information for representatives of the media Media Relations (E) Climate scientists will now be able to more accurately study the pattern and causes of global surface temperature changes than was previously possible, thanks to a large international team of scientists contributing to PAGES (Past Global Changes), one of the University of Bern's affiliated climate organizations. Our knowledge of global temperatures before routine weather measurements relies on so-called "proxy" data - biological and geological sources that provide indirect information on past temperatures. Tree rings, for example, tend to grow thicker in warmer years, allowing indirect estimates of temperature change during the life of the tree. The PAGES2k database includes proxy data from a number of distinct sources including tree rings, corals, glacier ice, and marine and lake sediments as well as historic documents. This vital tool for climate reconstructions and climate modeling has now been published online in the Nature journal Scientific Data . It represents the most transparent, complete and fully described release of the PAGES2k dataset to date, providing an important resource for climate researchers interested in how the climate has changed from 1 AD to the present. Past Global Changes (PAGES) is an international climate change research organization with its head office at the University of Bern.
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