Fig. 3.

(A) Methanol transfer velocity calculated using measured C_w; (B) calculated using C_w = 0 (n = 73). Measured friction velocity and the approximate wind speed are shown on the abscissae. Using measured C_w, calculated methanol transfer velocity sometimes exceeds the aerodynamic limit, particularly in high winds. In contrast, using C_w = 0 leads to more reasonable K_a, implying low dissolved methanol concentrations close to the air–water interface. K_Heat adjusted to neutral stability is shown as averages in u_* bins. Error bars on K_a, K_Heat, and u_* correspond to the respective SEs.