Preliminary results from a controversial study of global temperature
data confirm the overall warming trend long reported by government
scientists in the United States and the United Kingdom, the study's
director told a House panel today. The warming trend detected by scientists involved in the Berkeley Earth
Surface Temperature Study -- a rise of 0.7 degree Celsius since 1957 --
"is very similar" to the findings of independent analyses by NASA, the
National Oceanic and Atmospheric Administration and the U.K. Hadley
Centre, study Chairman Richard Muller said.
"The world temperature data has sufficient integrity to be used to
determine temperature trends," said Muller, a physicist at Lawrence
Berkeley National Laboratory.