Local environmental effects on cosmic ray observations at Syowa Station in the Antarctic: PARMA-based snow cover correction for neutrons and machine learning approach for neutrons and muons | Journal of Space Weather and Space Climate

Open Access

Figure 1

(a) The 10-day values of 30-day running averaged Sun’s polar magnetic field, (b) daily mean sunspot number, and (c) daily mean neutron monitor count rate at Oulu, Finland. The polar magnetic field strength (green dots) started decreasing in late 2019, while the neutron count rate started decreasing in early 2020.

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