The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds

@article{Atkinson2013TheIO,
  title={The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds},
  author={James D. Atkinson and Benjamin J. Murray and Matthew T. Woodhouse and Thomas F Whale and Kelly J. Baustian and Kenneth S. Carslaw and Steven Dobbie and Daniel O'Sullivan and Tamsin L. Malkin},
  journal={Nature},
  year={2013},
  volume={498},
  pages={355-358}
}
The amount of ice present in mixed-phase clouds, which contain both supercooled liquid water droplets and ice particles, affects cloud extent, lifetime, particle size and radiative properties. The freezing of cloud droplets can be catalysed by the presence of aerosol particles known as ice nuclei. One of the most important ice nuclei is thought to be mineral dust aerosol from arid regions. It is generally assumed that clay minerals, which contribute approximately two-thirds of the dust mass… Expand
Atmospheric science: The seeds of ice in clouds
TLDR
It is shown here that feldspar minerals dominate ice nucleation by mineral dust, despite being a minor dust component, and it is suggested that fellspar particles may account for a large proportion of ice nuclei in the Earth's atmosphere at certain temperatures, and as feldSpar content can vary, changes in the location of dust sources may alter the concentration of ice nucleus in the atmosphere and the associated climate effects. Expand
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Heterogeneous ice nucleation in the immersion mode plays a vital, yet poorly understood, role in the development of ice in mixed-phase clouds. From recent work it is thought that mineral dusts areExpand
Active sites in heterogeneous ice nucleation—the example of K-rich feldspars
TLDR
Direct electron-microscopic observations of deposition growth of aligned ice crystals on feldspar, an atmospherically important component of mineral dust, are reported and molecular-scale computer simulations indicate that this alignment arises from the preferential nucleation of prismatic crystal planes of ice on high-energy surface planes of feldSpar. Expand
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