NOTICE (August 2016): CDIAC as currently configured and hosted by ORNL will cease operations on September 30, 2017. Data will continue to be available through this portal until that time. Data transition plans are being developed with DOE to ensure preservation and availability beyond 2017.

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CDIAC Climate Holdings Containing Sunshine Duration Data

Data Set Name Investigators Data Type/Format Period of Record
Historical Sunshine and Cloud Data in the United States (CDIAC NDP-021) P.M. Steurer and T.R. Karl Station data; monthly and annual sunshine duration (SD), max. possible SD, and percentage of possible SD Varies by station; as long as 1891-1987
Two Long-Term Instrumental Climatic Data Bases of the People's Republic of China (CDIAC NDP-039) S. Tao et al. Station data; monthly sunshine duration Varies by station; through 1993