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Sunspot numbers and proton events in solar cycles 19 to 24
Bromage, B. J. I.; Birch, M. J.
In this study we compare the mean annual sunspot numbers for the six most recent solar cycles (19 to 24) with the number of solar energetic proton events occurring in those years. Though most of the individual cycles exhibit quite strong correlations, when they are combined into a generic solar cycle the result is very significant (ρ = 0.98). For …
Off-season lee wave cloud over the Arsia Mons in Mars: A study based on Mars Colour Camera (MCC)
Kalita, Jyotirmoy; Guha, Anirban
The present analysis reported the lee wave interpretation on Arsia Mons Elongated Cloud (AMEC) that used to appear over the lee side of the Arsia Mons. The present work also reported the wavelength, the cloud's height, and wind speed of the observed lee wave structure. The estimated wind speed is 86 ± 4.9 m/s, with a wavelength of 60 ± 0.3 km at a…