Fig. 3: Bispectral spectra averaged within 80–96 km, between Juliusruh and Mohe, and between zonal and meridional winds observed between 1 November 2018 and 31 January 2019.
From: Rossby wave second harmonic generation observed in the middle atmosphere
a Bispectrum. b Bicoherence. c Bispectral argument (namely, biphase). In (b) and (c), the dots indicate the significance level above α = 0.01.
