Insights on Climate-Driven Fluctuations of Cave ²²²Rn and CO₂ Concentrations Using Statistical and Wavelet Analyses

Figure 7

(a) Decomposition of different periodicities for outdoor temperature, ²²²Rn, and CO₂. (b) WTC and XWT between outdoor temperature and ²²²Rn. (c) WTC and XWT between outdoor temperature and CO₂; spectral strength and coherence range from blue (weak) to red (strong) colors. Arrows indicate the relative phase relationship (inphase pointing right, antiphase pointing left, one signal leading the other by 90° pointing up/down). Curved lines on scalograms indicate the cone of influence where the edge effects are important.

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