Articles | Volume 19, issue 3
Research article
08 Feb 2019
Research article |  | 08 Feb 2019

Kinetic mass-transfer calculation of water isotope fractionation due to cloud microphysics in a regional meteorological model

I-Chun Tsai, Wan-Yu Chen, Jen-Ping Chen, and Mao-Chang Liang

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Subject: Isotopes | Research Activity: Atmospheric Modelling | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Aldaz, L. and Deutsch, S.: On a relationship between air temperature and oxygen isotope ratio of snow and firn in the south pole region, Earth Planet. Sci. Lett., 3, 267–274, 1967. 
Blossey, N. P., Kuang, Z., and Romps, D. M.: Isotopic composition of water in the tropical tropopause layer in cloud-resolving simulations of an idealized tropical circulation, J. Geophys. Res., 115,, 2010. 
Chen, J. P. and Liu, S. T.: Physically based two-moment bulkwater parametrization for warm-cloud microphysics, Q. J. Roy. Meteorol. Soc., 130, 51–78, 2004. 
Chen, S. H., Liu, Y. C., Nathan, T. R., Davis, C., Torn, R., Sowa, N., Cheng, C. T., and Chen, J. P.: Modeling the effects of dust-radiative forcing on the movement of Hurricane Helene (2006), Q. J. Roy. Meteorol. Soc., 141, 2563–2570, 2015. 
Cheng, C.-T., Wang, W.-C., and Chen, J.-P.: A modeling study of aerosol impacts on cloud microphysics and radiative properties, Q. J. Roy. Meteorol. Soc., 133, 283–297, 2007. 
Short summary
In conventional models, isotope exchange between liquid and gas phases is usually assumed to be in equilibrium, and the highly kinetic phase transformation processes inferred in clouds are yet to be fully investigated. We show that different factors controlling isotopic composition, including water vapor sources, atmospheric transport, phase transition pathways of water in clouds, and kinetic-versus-equilibrium mass transfer, contributed significantly to the variations in isotope composition.
Final-revised paper