Fig. 3: Olive pollen production in relation to various proxies of solar activity.
From: Olive production in the 21st century will be threatened by water stress and declining solar activity
The periodicity of each proxy related to solar activity [a cosmogenic radionuclide 10Be, b ΔTSI and c sunspot number] is shown as wavelet transforms (scalogram) with the main periodicity noted on the graph. The long-term cycle of each proxy related to solar activity, as previously defined, was extracted and compared with the olive periodic signal [a pollen influx versus cosmogenic radionuclide 10Be, b pollen influx versus ΔTSI, and c pollen influx versus sunspot number]. The periodic olive signal, corresponding to the pollen influx curve, is the same for graphs (a–c).
