“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 Sciences78Environmental Science63Engineering41Arts and Humanities40Geography. Anthropology. Recreation: Human ecology. Anthropogeography: Settlements: Cities. Urban geography1Social Sciences: Communities. Classes. Races: Urban groups. The city. Urban sociology: Urbanization. City and country1