Ok that make sense, so the entire time, John was in the land of wind and shade, he just was so high up we couldn't tell.
I say this because it starts off announcing Rose's location.
Also it seems that the weather remains the same as before they went into the other world but the light/dark thing flips.
Dave will get some how burning thing, perhaps a hot urban jungle of sorts, and Jade will get a tropical weather type thing... dunno really