Water, bound and mobile

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Science  10 Jul 2015:
Vol. 349, Issue 6244, pp. 138-139
DOI: 10.1126/science.aac4742

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How much water is exchanged between the atmosphere and the land and ocean surfaces every year? The answer is important for developing accurate models of Earth's water cycle both now and in a warmer future climate. Good et al. recently reported high-resolution data on hydrogen water isotopes from the Tropospheric Emissions Spectrometer (TES) aboard NASA's Aura satellite (1). On page 175 of this issue, Good, Noone, and Bowen (2) use these data to estimate global values for plant transpiration, streamflow, and evaporation from various sources.