Environmental Data Service ... Variations of rainfall in Australia show a rough periodicity of 15 years with minor cycles and great droughts at intervals of 45 years. This is ... DNAL (278.8 R32) Periodicities of 12.9 and 23.7 yrs in annual rainfall of Fortaleza, Ceara and relations to sunspot maximum show an intense drought isanbsp;...
|Title||:||NOAA Technical Memorandum EDS.|
|Author||:||United States. Environmental Data Service|