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Fig. 5 | Progress in Earth and Planetary Science

Fig. 5

From: The science case for the EISCAT_3D radar

Fig. 5

Variations in ozone density (upper panel) and nitric oxide density (lower panel) at 46 km altitude, as observed by the GOMOS instrument on ENVISAT, following the intense solar particle events (SPE) during the Halloween superstorm of 2003 (adapted from Seppälä et al. 2004)

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