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Progress in Earth and Planetary Science
Figure 13 | Progress in Earth and Planetary Science

Figure 13

From: Short-term variability of the Sun-Earth system: an overview of progress made during the CAWSES-II period

Figure 13

Physical parameters of the solar wind at 1 AU obtained from the OMNI database from January 1996 through May 2014: Total pressure (Pt), magnetic field magnitude (B), proton density (N), proton temperature (T), and the Alfvén speed (VA) at 1 AU (red lines with left-side Y-axis). The same quantities extrapolated from 1 AU to the corona (20 Rs) are shown by the blue lines (right-side Y-axis), assuming that B, N, and T vary with the heliocentric distance R as R-2, R-2, and R-0.7, respectively. The blue bars denote the 66-month averages in each panel, showing the decrease of all the parameters in cycle 24.

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