Fig. 6From: Thermospheric inter-annual variability and its potential connection to ENSO and stratospheric QBO a Wavelet power spectrum of the density residual at 550 km altitude. Wavelet coherence between Nino3 and the density residual (b), between QBO and the density residual (c), and between P10.7 index and the density residual (d). The thick contour encloses regions of greater than 95 % significance levelBack to article page