Where do you think air masses of different temperatures come from?
What causes them to move in the directions
they do?

Here's link to the

cutt.ly/tz3yDpb

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.