They altered the deal on Vader's helmet (jpeg & gif comparison) (self.StarWars) submitted 4 months ago by pldkn. In a previous Japanese trailer, we could see Darth's menacing pose as he turns to the camera - but mostly I saw his awkward neck situation. In a new Chinese trailer, they show the same shot again, but this time it's obviously edited. No more weird neck situation, much more sinister looking indeed.
Air parcels, in a horizontal air pressure gradient, flows in a direction to eliminate the pressure gradient. The force that causes air parcels to move as the consequence of an air pressure gradient is known as the pressure gradient force and always acts directly perpendicular to isobars and toward lowest pressure.
Gradient refers to the change in pressure with distance. Look at the Hawaiian Islands area again. The pressure difference between isobars is 4 mb (1020 - 10160 mb) and the distance between them is about 600 kilometers (370 miles). The PGF on that day, therefore, was 4 mb per 600 km or about 0.07 mb/km, a normal trade wind condition. The PGF sets air in motion and determines wind speed. The higher the pressure gradient, the greater the wind speed as shown in the diagram below. In the diagram's left panel, the total pressure change is 8 mb (1020 - 1012 mb), causing relatively light winds.