Distribution of hydrogen peroxide in surface snow over antarctic ice sheet

The concentration of hydrogen peroxide (H2O2) in surface snow samples obtained in East Queen Maud Land, Antarctica, from summer 1991 to late summer 1993, is discussed. Surface snow samples were obtained in various locations and seasons during five traverses with snow vehicles. Gradual distributions were observed, depending upon the season and the location. The concentration of H2O2 is higher in summer than in winter, and is also higher in the inland region at higher altitude than in the coastal region lower altitude. A sudden increase in early summer snow was observed, suggesting the sudden change in atmospheric environments, affecting the concentration of H2O2 in the snow. Snow chemistry will possibly make the atmospheric environment more clear for us in near future.