摘要：The International Geophysical Year, IGY (1957-1958) has led to a comprehensive global study of geophysical phenomena and their relationships with solar activity. The IGY greatly expanded our knowledge of global processes, heralded the exploration of geospace, and left a legacy of monumental achievements including the World Data Center (WDC) system. Fifty years on, four new international programs -- International Polar Year (IPY), electronic Geophysical Year (eGY), International Year of Planet Earth (IYPE), and International Heliophysical Year (IHY) -- have been promoted. Efforts for renewal of the international data system such as the WDC and CODATA are also in progress. DOI: http://doi.org/10.2481/dsj.8.S1
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