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Evidence for 18.6 year Mn signal in temperature and drought conditions in North America since AD 1800It is found that, since 1800, the mean discrepancy in epoch between maxima in temperature and maxima in the Drought Area Index (DAI) for the western United States with respect to maxima in the lunar modal tide is 0.9 and 0.1 year, respectively. It is suggested, in light of the fact that a cluster of nine stations in western Canada yields the 18.6-year lunar nodal term out of phase with 30 stations in eastern North America, that (1) enhanced drought conditions in the western United States are neither recurrent nor rhythmic on a time scale of 20 years, but rather periodic with a period of 18.6 years, and (2) the Rocky Mountain system is an influence for atmospheric tidal phenomena at epochs of maximum in the lunar nodal tide as well as for maxima in the temperature records of the DAI.
Document ID
19820031544
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Currie, R. G.
(NASA Goddard Space Flight Center Laboratory for Planetary Atmospheres, Greenbelt, MD; ARCO Exploration Co., Dallas, TX, United States)
Date Acquired
August 10, 2013
Publication Date
November 20, 1981
Publication Information
Publication: Journal of Geophysical Research
Volume: 86
Subject Category
Geophysics
Accession Number
82A15079
Distribution Limits
Public
Copyright
Other

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