Solar Records: The Wolf Sunspot Index and Umbral/Penumbral Ratio, CDIAC NDP-014
Entry ID: CDIAC_NDP14

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Summary
Abstract: Observational records of sunspot activity are available from about 1875, with
reconstructions going back, possibly, to 1832. Available sunspot models and
the theory of mixing length indicate that the observed changes in the
umbral/penumbral (U/P) ratio may be equivalent to changes in the solar
constant. The U/P ratio is calculated from measurements of sunspot activity
and has been shown to be in ... View entire text
Temporal Coverage
Start Date: 1875-01-01
Stop Date: 1981-12-31
Originating Center
Data Center
Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy Supplemental Info
Data Center URL: http://cdiac.ornl.gov/
Dataset ID: NDP-014

Data Center Personnel
Name: CARBON DIOXIDE INFORMATION ANALYSIS CENTER
Fax: (865) 574-2232
Contact Address:
Carbon Dioxide Information Analysis Center (CDIAC)
Oak Ridge National Laboratory
P.O.. Box 2008
City: OAK RIDGE
Province or State: TENNESSEE
Postal Code: 37831-6335
Country: USA
Distribution
Distribution Media: CD-ROM

Distribution Media: on-line (FTP)
Personnel
Role: INVESTIGATOR
Publications/References
Hoyt, D.V., 1979: 'Variations in sunspot structure and climate.' Climatic
Change, 2:79-92.

Hoyt, D.V., 1979: 'An empirical determination of the heating of the earth
by the carbon dioxide greenhouse effect.' Nature, 282:388-390.
Extended Metadata Properties
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Creation and Review Dates
Last DIF Revision Date: 1997-08-26
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