Surface chlorine reservoir on ice

• Main Authors: Hirohito Ogasawara, Maki Kawai
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; The Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.8581; http://www.riken.go.jp/lab-www/library/publication/review/pdf/No_42/42_061.pdf

Free OH species at the ice surface play an important role in ozone hole chemistry occurring on clouds surface. Photodecomposition of CFCl3 on an ice surface grown on Ru(001) is studied in connection with the formation of chlorine reservoir in ozone hole chemistry. We have evidenced that the photolysis of CFCl3 on the ice surface leaves anionic chlorine are coordinated to the free OH species. This enables high concentration storage of chlorine on the ice surface. The seasonal ozone depletion above the Antarctic has been of particular interest because it has suffered extensive damage: this is well known “ozone hole”. 1) The ozone layer over the Antarctic becomes a catastrophically damaged in spring;in winter, however, the hole is closed. The theory that accounts for seasonal depletion of ozone considers thereservoirs. 2) Less reactive compounds such as HCl or ClONO2 are considered as the reservoirs. These molecules are thought to be produced by the quenching reaction between chlorine radicals and CH4 or NO2 molecules. A heterogeneous reaction between reservoirs