Topography can have some effect locally for sure. I'm close to CBD but a bit higher than average up the slopes of a local volcano ( extinct fortunately ). It gets me a wee bit above the local suburban fug, car fumes, smoke, dust etc by about 30 meters. Doesn't sound like much but also being away from local streetlights a bit it does make a difference to local air clarity.
You don't say how high you are up the escarpment but just the altitude factor can help a bit for sure.
Unfortunately it doesn't fix clouds ...
