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An analysis of periodicities in the 1470 to 1974 Beijing precipitation record
Author(s) -
Hameed S.,
Yeh W. M.,
Li M. T.,
Cess R. D.,
Wang W. C.
Publication year - 1983
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl010i006p00436
Subject(s) - beijing , environmental science , precipitation , climatology , dryness , lag , meteorology , spectral analysis , trend analysis , china , atmospheric sciences , geography , geology , statistics , physics , mathematics , medicine , computer network , surgery , archaeology , quantum mechanics , spectroscopy , computer science
An analysis of a time series consisting of an annual index of dryness/wetness for the years 1470 to 1974 in Beijing, China is presented. Its power spectrum shows that dominant cycles occur with long periods of the order of 80 years. Cycles with periods of 11 and 22 years are weak or non‐existent, but a significant signal at 18.7 years (which is also the period of a component of the lunar tide generating force) is detected. The long term variations in Beijing precipitation appear to lag long term (Gleissberg) variations in solar activity by nearly 75 years. A pattern which spans nearly 150 years in the Beijing record is found to be repeated with notable similarity.