Deuterium and oxygen‐18 isotope composition of precipitation and atmospheric moisture

Global prediction of δA and δ2H‐δ18O evaporation slopes for lakes and soil water accounting for seasonality

“…[7] Isotopic measurements of local water vapor at ground level reveals that in most cases equilibrium is maintained between vapor and precipitation over the continents [Araguás-Araguás et al, 2000], rain being the most common form of precipitation during the evaporation season. Values for the isotopic composition of d A have thus often been estimated on the basis of assumed isotopic equilibrium between atmospheric moisture and precipitation [Rozanski et al, 2001;Gibson et al, 1993], although this hypothesis remains to be rigorously tested.…”

Isotopic composition of precipitation in Ljubljana (Slovenia)

“…A positive δ value means that the isotopic ratio R of the sample is higher than that of the standard, and the sample is "heavier" or enriched relative to the standard; a negative δ value means that the isotopic ratio of the sample is lower than that of the standard; the sample is "lighter" or depleted. The observed variations of stable isotopic composition of hydrogen and oxygen in natural waters are closely related to isotopic fractionation occurring during the evaporation and condensation of water, when the heavy water molecules preferentially remain in or pass into the liquid (solid) phase, respectively (ARAGUAS-ARAGUAS et al, 2000). When water evaporates from the surface of the ocean the water vapour is enriched in 1 H and 16 O because 1 H 2…”

“…The stable isotope ratios of oxygen ( 18 O/ 16 O) and hydrogen ( 2 H/ 1 H) and the radioactive isotope tritium ( 3 H) offer a broad range of possibilities for studying processes within the water cycle and thus became an important tool not only in isotope hydrology, routinely applied in studies of the origin and dynamics of surface and groundwaters, but also in studies related to atmospheric circulation and paleoclimatic investigations (ARAGUAS-ARAGUAS et al, 2000). Understanding the formation of precipitation and its isotopic composition (δ 18 O, δ 2 H and 3 H activity), as well as a knowledge of temporal and spatial variations in the amount and mode of precipitation and in its isotopic composition, are important for basin-wide balance studies (e.g.…”

Factors controlling stable isotope composition of precipitation in arid conditions: an observation network in the Tianshan Mountains, central Asia

“…The stable hydrogen and oxygen isotopes in precipitation (dD and d 18 O) have been widely applied in studies of the hydrological cycle (Aragua´s-Aragua´s et al, 2000), for example, tracing moisture sources (e.g. Sodemann et al, 2008;Crawford et al, 2013;Jouzel et al, 2013), estimating evaporation (e.g.…”