What is the dominant pressure system influencing baghdad's annual precipitation pattern?

Dry climates have unreliable year-to year precipitation and have a moisture deficit - potential evapotranspiration exceeds precipitation.  These climates dominate large portions of the subtropics and extend into the interiors of continents in the middle latitudes and cover nearly one-third of Earth’s lands surface. Desert (BW)

Population of this city. also, look for information on available public transit, bike-sharing, and other commuting options. use the information you find and write about it promoting alternative transportation

Answerrecharge zone;