Climatic oscillations during the Precambrian era
dc.contributor.author | Zahnle, Kevin J. | en_US |
dc.contributor.author | Walker, James C. G. | en_US |
dc.date.accessioned | 2006-09-08T20:29:24Z | |
dc.date.available | 2006-09-08T20:29:24Z | |
dc.date.issued | 1987-07 | en_US |
dc.identifier.citation | Zahnle, Kevin J.; Walker, James C. G.; (1987). "Climatic oscillations during the Precambrian era." Climatic Change 10(3): 269-284. <http://hdl.handle.net/2027.42/42576> | en_US |
dc.identifier.issn | 0165-0009 | en_US |
dc.identifier.issn | 1573-1480 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/42576 | |
dc.description.abstract | A remarkably regular cyclicity with a fundamental period of ~11–12 cycles is preserved in the 680 million year old Elatina formation of South Australia. All but one of the many periods present can be interpreted as resulting from the combined influences of the sunspot cycle and the lunar nodal tide - in particular, beating between these two cycles gives rise to a long period phase alternation. Available paleontological evidence is used to constrain the lunar distance 680 Ma ago, thereby constraining the length of the lunar nodal tide. We then infer from the beat period that the sunspot cycle was 10.8 ± 0.2 years, which is in agreement with independent astronomical evidence suggesting that the sunspot cycle would then have been some 3–10% shorter than it is at present. Although this interpretation is not consistent with the 12.0 year sunspot cycle counted by Williams and Sonett (1985), we demonstrate that unavoidable random errors made in discriminating unusually indistinct varves gives rise to a systematic overcount of varves of this magnitude. The clarity of this evidence for solar and lunar signals in the climate 680 Ma ago lends support to reports of their importance today. | en_US |
dc.format.extent | 984646 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Kluwer Academic Publishers; D. Reidel Publishing Company ; Springer Science+Business Media | en_US |
dc.subject.other | Geosciences | en_US |
dc.subject.other | Meteorology/Climatology | en_US |
dc.title | Climatic oscillations during the Precambrian era | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbsecondlevel | Atmospheric, Oceanic and Space Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Atmospheric and Oceanic Sciences, and Department of Geological Sciences, The University of Michigan, 48109-2143, Ann Arbor, MI, U.S.A. | en_US |
dc.contributor.affiliationother | NASA Ames Research Center, 94035, Moffett Field, CA, U.S.A. | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/42576/1/10584_2004_Article_BF00143906.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF00143906 | en_US |
dc.identifier.source | Climatic Change | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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