3.1.1 Orinoco delta region
The diurnal cycles of mean wind speed and potential temperature (Fig. 6) along the Orinoco delta region and Venezuelan Llanos (axis of propagation M in Fig. 5), show the sea breeze already established at 1100 LST (Fig. 6b), with a well-defined thermal internal boundary layer to the east of 64ºW; an indication that cool maritime air has advanced over the Orinoco delta region. As the day progresses, this denser air is advected further onshore, and once it reaches the western limit of the Guanipa Mesa (~64.5ºW) around 1500 LST (Fig. 6c), it flows downslope causing the wind to accelerate.