Water continually transfers among the atmosphere, land, oceans, living systems, and frozen reservoirs. Trace evaporation, condensation, precipitation, runoff, infiltration, storage, and circulation as parts of an interconnected planetary process.
Water may remain in the atmosphere for little more than a week, circulate through the ocean for millennia, or stay trapped in deep groundwater far longer. These differences are described by residence time: the average period water spends within a defined reservoir before leaving it for another part...
On a winter weather map, an atmospheric river may appear as a long plume stretching from a humid ocean region toward land. The visible shape can be thousands of kilometers long but only several hundred kilometers wide. Inside it, strong winds move concentrated water vapor through the lower...
Most water entering the Amazon atmosphere begins over the tropical Atlantic, but it does not simply cross the forest once. Rain falls, trees return part of it as vapor, winds move that vapor, and new rain forms farther inland. Repeated exchanges allow the same Atlantic-derived moisture to...
A forest canopy does more than receive rainfall. It divides incoming water among several routes, returning some directly to the atmosphere, guiding some down branches and trunks, and allowing the remainder to reach the ground. Once water enters the soil, tree roots can lift it back toward the...