A Review of Water Isotopes in Atmospheric General Circulation Models: Recent Advances and Future Prospects. (23rd September 2014)

• Record Type: Journal Article
• Authors: Xi, Xi
• Other Names: Flocas Helena A. Academic Editor.
• Is Part Of: International journal of atmospheric sciences. Volume 2014(2014)
• Publication Date: 2014-09-23
• Subjects: Atmospheric physics -- Periodicals; Atmospheric chemistry -- Periodicals; Atmospheric chemistry; Atmospheric physics; Periodicals; Electronic journals; 551.5
• DOI: 10.1155/2014/250920
• Languages: English
• ISSNs: 2314-4122

Abstract

Abstract : Stable water isotopologues, mainly 1 H2 O, 1 H 2 HO (HDO), andH 1 2 O 18, are useful tracers for processes in the global hydrological cycle. The incorporation of water isotopes into Atmospheric General Circulation Models (AGCMs) since 1984 has helped scientists gain substantial new insights into our present and past climate. In recent years, there have been several significant advances in water isotopes modeling in AGCMs. This paper reviews and synthesizes key advances accomplished in modeling (1) surface evaporation, (2) condensation, (3) supersaturation, (4) postcondensation processes, (5) vertical distribution of water isotopes, and (6) spatial δ 18 O-temperature slope and utilizing (1) spectral nudging technique, (2) higher model resolutions, and (3) coupled atmosphere-ocean models. It also reviews model validation through comparisons of model outputs and ground-based and spaceborne measurements. In the end, it identifies knowledge gaps and discusses future prospects of modeling and model validation.