“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.
Environmental Science57Earth and Planetary Sciences12Agricultural and Biological Sciences11Biochemistry, Genetics and Molecular Biology10Science: Natural history (General): General. Including nature conservation, geographical distribution1