Figure 4

Wavelet coherence analyses for Cuxhaven and Kaitoke between tritium concentration of precipitation and neutron count rate of Oulu (for Cuxhaven) and Hermanus (for Kaitoke). Red areas bounded by black contour lines indicate significant coherence (α < 0.05). The shading indicates areas outside the cone of influence. Arrows indicate phase angle (in the all case of time series are in phase when the arrows point to the right).