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Progress in Chemistry 2004, Vol. 16 Issue (01): 49- Previous Articles   Next Articles

• Review •

Polar Stratospheric Clouds and Its Heterogeneous Chemistry*

Wang Zhenya**;Zhou Shikang;Sheng Liusi   

  1. (Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; National Synchrotron Radiation Laboratory, China University of Science and Technology, Hefei 230029, China)
  • Received: Revised: Online: Published:
  • Contact: Wang Zhenya
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Abstract The formation of Antarctic ozone hole is mainly related to the polar stratospheric clouds and the processes of heterogeneous chemistry. In Antarctic polar stratospheric clouds, there are sulfuric acid aerosols, some solid and liquid particles related to HNO3/H2SO4/H2O, and ice crystals of water. The heterogeneous chemical reactions will occur on the surface of polar stratospheric clouds particles. On one hand, they make C1ONO2 to react with some molecules to release Cl2 and HOCl, both of which in turn release Cl atoms that destroy ozone. On the other hand, they convert stratospheric nitrogen compounds (N2 O5, NO and NO2) to HN03, which will be removed out from stratosphere in the way of solid par-ticles. The catalytic cycles of CIO dimmer, and co-reaction of ClO-BrO will be enhanced by the release of Cl atoms, and which will promote the formation of Antarctic ozone hole. The emphases of this paper will be placed on introducing effects of polar stratospheric clouds and its heterogeneous chemistry on the ozone depletion process in polar stratosphere, and make a clear understanding of heterogeneous chemistry occurred on surface of polar stratospheric clouds.
Key words: Antarctic ozone hole, polar stratospheric clouds, heterogeneous chemistry

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