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- Title
Deuterium and oxygen-18 isotope composition of precipitation and atmospheric moisture
- Authors
Froehlich, K.; Rozanski, K.; Araguas-Araguas, L.
- Abstract
The stable isotopes of oxygen and hydrogen incorporated in the watermolecule (18O and 2H) have become an importanttool not only in Isotope Hydrology, routinely applied to study the origin and dynamics of surface and groundwaters, but also in studies related to atmospheric circulation and palaeoclimatic investigations. A proper understanding of the behavior of these tracers in the water cycle is required for a meaningful use of these tools in any of thesedisciplines. Our knowledge of the vertical distribution and the factors controlling the stable isotope ratios of oxygen and hydrogen in atmospheric moisture derives from a limited number of observations andvertical profiles in the atmosphere. An international program jointly operated by the International Atomic Energy Agency (IAEA) and the World Meteorological Organization (WMO), and operational since 1961, has resulted in the development of a dedicated database to monitor isotope ratios in precipitation in more than 500 meteorological stationsworld-wide. The main features of the spatial and temporal variationsof stable isotope ratios of oxygen and hydrogen in precipitation andatmospheric moisture at the global scale are presented based on the analysis of limited data on water vapor, data obtained by the Global Network for Isotopes in Precipitation (GNIP) and the few observationsat high latitudes.
- Subjects
METEOROLOGICAL precipitation; ATMOSPHERIC chemistry; ATMOSPHERE
- Publication
Hydrological Processes, 1998, Vol 12, Issue 5, p1341
- ISSN
0885-6087
- Publication type
Article