Sunspot periods in the late Precambrian glacial climate and solar-planetary relations

Details Sunspot periods in the late Precambrian glacial climate and solar-planetary relations Sunspot periods in the late Precambrian glacial climate and solar-planetary relations

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.291..624w&link_type=abstract

Nature, Volume 291, Issue 5817, pp. 624-628 (1981).

Mathematics

Logic

56

Scientific paper

Cycles conspicuous in late Precambrian (~680 Myr) glacial varves in Australia reveal strong climatic periods of about 11, 22, 145 and 290 yr and a weaker period near 90 yr. The 11-, 22- and 90-yr cycles equate with sunspot periods, and the longer cycles with solar and climatic periods as indicated by tree-ring studies. The varve cycles provide clear evidence of 11- and 22-yr climatic periods in the geological record and may carry important implications for solar physics and planetary science.

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