Please use this identifier to cite or link to this item: https://une.intersearch.com.au/unejspui/handle/1959.11/1382
Title: Exploratory Analysis of Similarities in Solar Cycle Magnetic Phases with Southern Oscillation Index Fluctuations in Eastern Australia
Contributor(s): Baker, Robert Graham  (author)
Publication Date: 2008
DOI: 10.1111/j.1745-5871.2008.00537.x
Handle Link: https://hdl.handle.net/1959.11/1382
Abstract: There is growing interest in the role that the Sun's magnetic field has on weather and climatic parameters, particularly the ~11 year sunspot (Schwab) cycle, the ~22 yr magnetic field (Hale) cycle and the ~88 yr (Gleissberg) cycle. These cycles and the derivative harmonics are part of the peculiar periodic behaviour of the solar magnetic field. Using data from 1876 to the present, the exploratory analysis suggests that when the Sun's South Pole is positive in the Hale Cycle, the likelihood of strongly positive and negative Southern Oscillation Index (SOI) values increase after certain phases in the cyclic ~22 yr solar magnetic field. The SOI is also shown to track the pairing of sunspot cycles in ~88 yr periods. This coupling of odd cycles, 23–15, 21–13 and 19–11, produces an apparently close charting in positive and negative SOI fluctuations for each grouping. This Gleissberg effect is also apparent for the southern hemisphere rainfall anomaly. Over the last decade, the SOI and rainfall fluctuations have been tracking similar values to that recorded in Cycle 15 (1914–1924). This discovery has important implications for future drought predictions in Australia and in countries in the northern and southern hemispheres which have been shown to be influenced by the sunspot cycle. Further, it provides a benchmark for long-term SOI behaviour.
Publication Type: Journal Article
Source of Publication: Geographical Research, 46(4), p. 380-398
Publisher: Wiley-Blackwell Publishing Asia
Place of Publication: Australia
ISSN: 1745-5863
1745-5871
Field of Research (FOR): 040105 Climatology (excl Climate Change Processes)
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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