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Fig. 3 | Earth, Planets and Space

Fig. 3

From: On forced and free atmospheric oscillations near the 27-day periodicity

Fig. 3

Zonal wind spectrum at mid-latitudes (SV-simulation). Zonal wind envelopes \(\Delta u\) at 42°N from the SV-simulation including the short-term solar forcing. The zonal wind envelopes are separated into panels for summer (a) and winter (b) periods. The spectrum of mesospheric summer shows a 10-day wave and a 35-day wave in the winter UTLS region when the short-term solar forcing is on. The magenta dashed lines refer to the solar 27-day periodicity and its 13.5-day harmonic. Please mind the two different colour codes for the panels

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