Space Observations of Water Isotopes Provide a New Tool for Understanding the Water Cycle

Workshop/Meeting Summaries: – First NEESPI Summit 13 – GABLS Workshop 14 More depleted values of δD shown at the higher latitudes indicate a long history of condensation during transit from a lower latitude source, while less depleted values in the tropics reflect ventilation of recently evaporated boundary layer vapor into the free troposphere (above 850 hPa, where TES is sensitive). Knowledge of these differences makes possible depiction of water cycling in the atmosphere. See article by D. Noone et al. on page 9.