Reminds me of the Old Testament, seven years of fat, seven years of lean.
A seven-year regulation of the El Niño-Southern Oscillation 3,700 years agoThe oxygen isotopic composition of coral aragonite offers a robust proxy of ENSO variability because it is sensitive to both the oceanic and atmospheric components of ENSO. Corals from the island of Sumba, Indonesia, are well situated to record the sea-surface cooling and droughts brought about by El Niño events... We have extended this approach to produce a high-resolution, 57-year-long coral d18O record of past ENSO variability from a fossil coral that grew within the fringing reef of Sumba 3,700 years ago... Our results suggest that El Niño events were less frequent and more regular 3,700 years ago, relative to the unpredictable 3-8 year periodicity for modern El Niño events. The seven-year regulation of El Niño is fascinating because it suggests that, under certain background climate states, El Niño events may be predicted years in advance.
D.Qu, M. K. Gagan,
W.S.Hantoro, B.W. Suwargadi
7+7=18.6
Got it.