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Solar activity during the last millennium, estimated from cosmogenic in-situ C14 in South Pole and GISP2 ice cores
Entry ID: NSF-ANT05-38683

Abstract: The principal aim of this research is to determine the precise manner in which solar activity has varied in the past 1000 years. During this period, four periods of very low solar activity have been identified: Wolf (1305-1345 AD), Spoerer (1418-1540 AD), Maunder (1645-1715), and one period of high solar activity (1100-1250 A.D.) have been deduced based on available historical records of sunspot ... View entire text
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Description: Original data files submitted.

Description: NSF Award Abstract #0538683.
Geographic Coverage
Spatial coordinates   
  N: -60.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Version: Not provided
Temporal Coverage
Start Date: 2006-02-15
Stop Date: 2009-01-31
Data Set Progress
Data Center
United States Antarctic Program Data Center Supplemental Info
Data Center URL:

Data Center Personnel
Email: info at
Contact Address:
Lamont-Doherty Earth Observatory
61 Route 9W
City: Palisades
Province or State: NY
Postal Code: 10964
Country: USA
Email: dlal at
Contact Address:
Scripps Institution of Oceanography
University of California, San Diego
City: La Jolla
Province or State: CA
Postal Code: 92093
Country: US
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2009-02-20
Last DIF Revision Date: 2018-11-12