Figure 4 | Scientific Reports

Figure 4

From: Decadal variability of tropical tropopause temperature and its relationship to the Pacific Decadal Oscillation

Figure 4

Power spectrum of tropical (20°S–20°N) tropopause temperatures from different CESM-WACCM simulations for the period 1955–2099: (a) the Natural run, (b) the FixSolar run, (c) the FixSST run and (d) the NOQBO run. Thick black lines indicate the best fit based on a first-order autoregressive model and the dashed black lines indicate the 95% confidence level. The dashed vertical lines indicate time periods of 9 and 13 years. Influences from volcanic aerosols have been removed before applying the FFT analysis.

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