Model zonal wind velocity profiles (v(l)) for the approximate dates (L_s) observed by ALMA, extracted from (left) the TitanWRF GCM (Y. Lian et al. 2025) and (right) the TAM GCM (N. A. Lombardo & J. M. Lora 2023a). Wind speeds have been averaged over 10 model years and vertically weighted using the average CH₃CN contribution function (Figure B2). Vertical dashed lines indicate l = −60°, 0°, and 60°; dotted lines indicate l = −45° and −5°. 1σ uncertainty envelopes indicate the standard deviation of the wind speeds over the (multiyear) modeled periods.