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A group of international scientists led by a climate expert from USC has upgraded an open-source global database tracking the Earth’s temperatures since 1 A.D. that further confirms the Earth is warming at a rate unprecedented in recent geologic history.
The database by the PAGES 2k Consortium relies on proxy data such as tree rings, corals, glacier ice, marine sediment and other such data to track shifts in temperature.
Julien Emile-Geay, an associate professor at the USC Dornsife College of Letters, Arts and Sciences, said he and other climate scientists with the international consortium have updated the organization’s original 2013 database to include more and higher-quality records from around the world. It now has nearly 692 records, up from the original 501.
The increasing amount of data, and the quality control applied by the 98 authors led to a more accurate database, Emile-Geay said.
Version 2 of the database from PAGES 2k was announced on July 11 in Scientific Data, a Nature journal. Emile-Geay was the corresponding author for the paper announcing the upgraded data.
PAGES, or Past Global Changes, was launched in 1991 as a project intended to improve scientific research and understanding of climate change by studying the past. In 2006, the PAGES 2k Network was started to compile and analyze global data for the past 2,000 years. The database involves contributions from nearly 100 scientists from 22 countries.
Scientists have found that the average global temperature on Earth has increase about 1.4 degrees Farenheit (0.8 Celsius) per year since 1880.
Adding records to the PAGES 2k database improves the database’s accuracy and narrows the margin of error for tracking global temperature changes, said Emile-Geay, an expert in climate modelling. The database is open source so that both scientists and citizens can study it.
Read More At: http://news.usc.edu/124797/scientis...k-their-findings-the-earth-is-getting-warmer/