The range of scientific opinion is quite broad on the topic of how much climate variability and change is driven by solar variations. Nevertheless, as more observational data and improved statistical analysis techniques become available, it is becoming increasingly obvious that solar variations are important. For temperature, many scientists now feel that natural solar variations were the main contributor to the early 20th century warming that occurred between about 1910 and 1950. The dramatic warming since 1980, however, cannot be explained by changes in solar output. [UEA's Tim Osborn, Nov 2000]
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