The researchers studied how wind shear affects the accuracy of predicting offshore wind energy. They used data from an offshore wind farm and a computer model to compare two methods of predicting power output. The new method, called rotor equivalent wind speed (REWS), sometimes gave more accurate predictions than the traditional method (hub height wind speed). By considering wind shear and atmospheric stability, the REWS method could help calculate wind energy more accurately and assess the economic feasibility of wind farm projects.