To be elected a Union Fellow is a special tribute for those who have made exceptional scientific contributions. Nominated Fellows must have attained acknowledged eminence in the Earth and space sciences. Primary criteria for evaluation in scientific eminence are: (1) major breakthrough, (2) major discovery, (3) paradigm shift, and/or (4) sustained impact. This designation is conferred upon not more than 0.1% of all AGU members in any given year. New Fellows are chosen by a Committee of Fellows.
Recipients of AGU Union medals and Ambassador awards are automatically conferred a Fellow if they are not already an elected AGU Fellow.