摘要:A letter dated 30 March 1960 by Mr. D.A. Davies,Secretary-General of the World MeteorologicalOrganization (WMO) in Geneva, to Mr. HenrySeligman, Deputy Director General of the Departmentof Research and Isotopes (now called the Department ofNuclear Sciences and Applications) of the — at that time— young IAEA, set the stage for what has today becomethe world’s largest and most comprehensive collection ofisotope data in atmospheric waters, the Global Network ofIsotopes in Precipitation (GNIP).