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From Wikipedia's BEST article
Berkeley Earth has been funded by unrestricted educational grants totaling (as of December 2013) about $1,394,500.
[3] Large donors include
Lawrence Berkeley National Laboratory, the
Charles G. Koch Foundation, the Fund for Innovative Climate and Energy Research (FICER),
[4] and the William K. Bowes, Jr. Foundation.
[5] The donors have no control over how Berkeley Earth conducts the research or what they publish.
[6]
The team's preliminary findings, data sets and programs were published in journals operated by
OMICS Group, a
predatory open access publisher beginning in December 2012. The study addressed scientific concerns including urban heat island effect, poor station quality, and the risk of data
selection bias. The Berkeley Earth group concluded that the warming trend is real, that over the past 50 years (between the decades of the 1950s and 2000s) the land surface warmed by 0.91±0.05°C, and their results mirror those obtained from earlier studies carried out by the U.S.
National Oceanic and Atmospheric Administration (NOAA), the
Hadley Centre, NASA's
Goddard Institute for Space Studies (GISS) Surface Temperature Analysis, and the
Climatic Research Unit (CRU) at the
University of East Anglia. The study also found that the
urban heat island effect and poor station quality did not bias the results obtained from these earlier studies.
[7][8][9][10]