Linking rainfall to its source: the idea of a precipitationshed

Patrick Keys, a researcher at the Stockholm Resilience Center, proposes an interesting new concept in this video. The idea of a precipitationshed is analogous to a watershed (the land area capturing and directing surface water flows). In the precipitationshed the areas of interest are the evaporation sites and precipitation sinks that those particular sites contribute to. More here, and a video below.