Fig. 5: Zonal forcing due to vertical momentum flux.
From: Generation of gravity waves from thermal tides in the Venus atmosphere

a–d Longitude–height cross-sections of composite-mean zonal forcing (m s–2) due to vertical momentum flux expressed by Eq. (4) at the equator with different resolved scales, total (\(0\le k\le 639\)), large-scale (\(0\le k\le 9\)), medium-scale (\(10\le k\le 49\)) and small-scale (\(50\le k\le 159\)) ones, respectively. Zonal flow disturbances from its zonal average (black contours; intervals are 10 m s−1) are also shown. The subsolar point is located at the centre of each panel, (180°E, 0°N).