Before revision: Background Drought is an anomaly of the atmospheric, surface, and sub-surface cycling of water and energy, usually initiated through large to regional-scale atmospheric processes, and enhanced and maintained through regional to local atmospheric, surface hydrology, land surface and groundwater feedbacks that operate throughout the annual cycle.
After revision: Background Drought is an anomaly of the atmospheric, surface, and sub-surface cycling of water and energy, usually initiated with large- to regional-scale atmospheric processes, and enhanced and maintained with regional-to-local atmospheric, surface hydrology, land surface and groundwater feedback in an annual cycle.