Is the concept of a zonal mean tropical precipitation change useful?

Alyssa R. Atwood, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Aaron Donohoe, Applied Physics Laboratory, University of Washington, Seattle, WA, United States, David Battisti, University of Washington, Seattle, WA, United States, Xiaojuan Liu, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States and Francesco S.R. Pausata, University of Quebec at Montreal UQAM, Department of Earth and Atmospheric Sciences, Montreal, QC, Canada