Elucidation of release mechanism of gas and particles from snow surface

2014 Fiscal Year Final Research Report

• Project/Area Number: 24651015
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Osaka Prefecture University
• Principal Investigator: TAKENAKA Norimichi 大阪府立大学, 工学(系)研究科(研究院), 教授 (70236488)
• Research Collaborator: NORO Kazushi ; Duong Huu Huy ; Trinh Thai Ha ; KITADA Kodai
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 硝酸 / 積雪 / エアロゾル / 揮散 / 光分解 / 塩化水素 / アンモニア / 雪の均一化

Outline of Final Research Achievements

We observed NOx produced by irradiation of UV light to snow sample including nitrate. This is probably due to that concentration of nitrate becomes high in snow by evaporating water vaper from warm part to colder part formed by temperature gradiant in snow cover. The release of NOx is expected to affect on photochemistry and the release of nitric acid affects on the aerozole composition in the Antactic atmosphere. On the other hand, photochemical reaction of chloride was not observed, but evaporation loss of chloride (HCl gas) was observed. We also observed the possibility of the reaction of nitrate with iodide, but the reproducibilty was not good. Further research will be required for the reaction. Finally, in this research, we establised the homogenization method of snow sample.

Free Research Field

環境化学