“2-yr mean citedness” is the OpenAlex field summary_stats.2yr_mean_citedness (CC0): mean citations per paper over a two-year window. It is a raw bibliometric field, not a journal rating, and is not used for default ranking.
Social Sciences40Environmental Science21Agricultural and Biological Sciences19Biochemistry, Genetics and Molecular Biology19Arts and Humanities16Science: Biology (General): Ecology1Science: Biology (General): Evolution1