Evidence for a larger sun with a slower rotation during the seventeenth century

Details Evidence for a larger sun with a slower rotation during the seventeenth century Evidence for a larger sun with a slower rotation during the seventeenth century

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.326...52r&link_type=abstract

Nature (ISSN 0028-0836), vol. 326, March 5, 1987, p. 52-55.

Physics

41

Atmospheric Temperature, Climate, Solar Diameter, Solar Rotation, Solar Terrestrial Interactions, Accuracy, Solar Activity, Solar Radiation, Sunspots

Scientific paper

Historical records suggest that during the seventeenth century the Sun was subject to an anomalous scarcity of sunspots (the Maunder minimum). This minimum was coincident with a severe temperature dip of the Little Ice Age, from which a relation between solar activity and terrestrial climate has been conjectured. By analysing a unique 53-year record of regular observations of the solar diameter and sunspot positions during the seventeenth century, the authors show for the first time that the solar diameter was larger and rotation slower during the Maunder minimum. This finding sheds new light on the dynamo mechanism, solar variability, and the consequent effects on terrestrial climate.

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