Laboratory measurements of HDO/H₂O isotopic fractionation during ice deposition in simulated cirrus clouds.

ABSTRACT: The stable isotopologues of water have been used in atmospheric and climate studies for over 50 years, because their strong temperature-dependent preferential condensation makes them useful diagnostics of the hydrological cycle. However, the degree of preferential condensation between vapor and ice has never been directly measured at temperatures below 233 K (-40 °C), conditions necessary to form cirrus clouds in the Earth's atmosphere, routinely observed in polar regions, and typical for the near-surface atmospheric layers of Mars. Models generally assume an extrapolation from the warmer experiments of Merlivat and Nief [Merlivat L, Nief G (1967) Tellus 19:122-127]. Nonequilibrium kinetic effects that should alter preferential partitioning have also not been well characterized expe

SUBMITTER: Lamb KD 

PROVIDER: S-EPMC5465917 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature