USAP-DC

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Cosmic Ray Observations in McMurdo Description/Abstract This proposal seeks funding to continue the neutron monitor observations at McMurdo for at least 4 years of operation - through the next solar activity maximum predicted in 2011-12. The neutron monitor in McMurdo is a crucial element of the "Spaceship Earth" array - a 12-station multi-national network of neutron monitors optimized to measure the angular distribution of relativistic solar cosmic rays. McMurdo has the southernmost viewing direction of any neutron monitor station in the World, thereby providing a critical three-dimensional perspective on the cosmic ray distribution measured by the global array. Data returned from McMurdo and other "Spaceship Earth" stations will enable the advanced understanding of the acceleration and transport of solar energetic particles, and of the transient and long-term modulation of galactic cosmic rays by the Sun. From the historical occurrence rates, continuing McMurdo observations through the solar activity maximum would allow to detect new relativistic solar particle events. Neutron monitors can play a direct role in forecasting and specifying solar wind disturbances, thus improving the capability to forecast major space weather events for the societal benefit. For example, providing the cosmic rays Ground-Level Enhancement (GLE) alerts is of direct relevance to aviation flights over high latitudes where these events can pose health hazards. Personnel Person Role Bieber, John Investigator Evenson, Paul Co-Investigator Funding Antarctic Astrophysics and Geospace Sciences Award # 0739620 AMD - DIF Record(s) NSF-ANT07-39620_1 Data Management Plan None in the Database Product Level: 0 (raw data) Datasets Repository Title (link) Format(s) Status USAP-DC Cosmic Ray Observations in McMurdo None exist Publications Boschini, M. J., Della Torre, S., Gervasi, M., La Vacca, G., & Rancoita, P. G. (2019). The HelMod model in the works for inner and outer heliosphere: From AMS to Voyager probes observations. Advances in Space Research, 64(12), 2459–2476. (doi:10.1016/j.asr.2019.04.007) Frederick, J. E. (2017). An analysis of couplings between solar activity and atmospheric opacity at the South Pole. Journal of Atmospheric and Solar-Terrestrial Physics, 164, 97–104. (doi:10.1016/j.jastp.2017.08.011) Oh, S., Bieber, J. W., Evenson, P., Clem, J., Yi, Y., & Kim, Y. (2013). Record neutron monitor counting rates from galactic cosmic rays. Journal of Geophysical Research: Space Physics, 118(9), 5431–5436. (doi:10.1002/jgra.50544) Bieber, J., Clem, J., Evenson, P., Oh, S., & Pyle, R. (2013). Continued decline of South Pole neutron monitor counting rate. Journal of Geophysical Research: Space Physics, 118(11), 6847–6851. (doi:10.1002/2013ja018915) Platforms and Instruments