NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The sun since the Bronze AgeAn investigation is conducted concerning the behavior of the sun during the last 7000 years. The C-14 content in carbonaceous fossil material can be used as an indicator regarding the level of solar activity at the time when the carbon was assimilated in the process of photosynthesis. Living trees, such as the bristlecone pine, provide a solar activity record to about 3000 B.C. The record can be extended with the aid of well-preserved dead wood to beyond 5000 B.C. The results of an analysis of solar activity levels as a function of time on the basis of C-14 contents are presented in a graph. Attention is given to the Maunder Minimum, a history of the sun in the last 5000 years, an interpretation of the major C-14 excursions, and the sun and climate history.
Document ID
19770061407
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Eddy, J. A.
(High Altitude Observatory Boulder, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1976
Subject Category
Solar Physics
Meeting Information
Meeting: International Symposium on Solar-Terrestrial Physics
Location: Boulder, CO
Start Date: June 7, 1976
End Date: June 18, 1976
Accession Number
77A44259
Funding Number(s)
CONTRACT_GRANT: NAS5-3950
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available