A global perspective on African climate

摘要: We describe the global climate system context in which to interpret African environmental change support planning and implementation of policymaking action at national, regional continental scales, inform debate between proponents mitigation v. adaptation strategies face change. review recent advances current challenges research exploit our physical understanding variability trends shape outlook on future classify various mechanisms that have been pro- posed as relevant for variations rainfall, emphasizing a "tropospheric stabilization" mechanism is importance interannual time scales well response warming oceans. Two patterns stand out analysis twentieth century rainfall variability: drying mon- soon regions, related tropical oceans, El Nino-Southern Oscillation. The latest generation models partly captures this continent-wide trend, attributing it combination anthropogenic emissions aerosols greenhouse gases, relative contribution