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Earth, Planets and Space
Figure 3 | Earth, Planets and Space

Figure 3

From: The spatial density gradient of galactic cosmic rays and its solar cycle variation observed with the Global Muon Detector Network

Figure 3

Long-term variations of modulation parameters derived from the 3D anisotropy in the solar wind frame. Each panel displays the yearly mean (a) G |z|, (b) G r , and (c) λ ∥ as a function of year. Solid and open circles in each panel represent parameters derived from the GMDN and Nagoya data, respectively. In each panel, yearly mean value and its error are deduced from the average and dispersion of monthly mean values. Gray vertical stripes indicate periods when the polarity reversal of the solar polar magnetic field (referred as A>0 or A<0 in (c)) is in progress.

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