“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.
Economics, Econometrics and Finance41Energy17Engineering5Environmental Science5Social Sciences: Industries. Land use. Labor: Special industries and trades: Energy industries. Energy policy. Fuel trade1Technology: Engineering (General). Civil engineering (General): Environmental engineering1Technology: Mechanical engineering and machinery: Energy conservation1Technology: Mechanical engineering and machinery: Renewable energy sources1