1992 Fiscal Year Final Research Report Summary
Study of generation and circulation of ocean origin materials by the aircraft observation
| Project/Area Number |
03302020
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
気象・海洋・陸水学
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| Research Institution | Water Research Institute, Nagoya University |
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Principal Investigator |
TANAKA Hiroshi Water Res. Inst. Nagoya Univ. Professor, 水圏科学研究所, 教授 (00115594)
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| Co-Investigator(Kenkyū-buntansha) |
YAMATO Masahiko College of General Education, Gunma Univ., Lecturer, 教養部, 講師 (60212289)
ITO Tomoyuki Japan Meteorological Agency, Ozon Layer Monitoring Office, Head, 高層気象台観測第三課, 課長
ARAO Kimio School of Education, Nagasaki Univ., Professor, 教育学部, 教授 (40039425)
TERAI Hisayoshi Water. Res. Inst. Nagoya Univ. Associate Professor, 水圏科学研究所, 助教授 (10023855)
OHTA Keiichi Water. Res. Inst. Nagoya Univ. Associate Professor, 水圏科学研究所, 助教授 (80022250)
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| Project Period (FY) |
1991 – 1992
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| Keywords | Atmospheric minor constituent / Sulpher compound / Nitrogen compound / Dimethylsulphide / Methanesulphonic / Nitrous oxide / Sulpheric acid / Atmospheric aerosols |
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| Research Abstract |
Many kinds of minor continuents are emitted from the ocean to the atmosphere. Sulpher compounds and nitrogen compounds are important among them.
Dimethylsulfide in the atmosphere is oxidized by OH radicals and is changed to SO_2 and methanesulfonic acid (MSA). These are finally changed to sulpheric acid (H_2SO_4) and compose of atmospheric aerosols. This reaction process is observed by the ships and airplanes. The results demonstrate that a characteristic sulpher circulation system exists in the atmosphere over the open ocean. Nitrous oxide (N_2O) is also emitted to the atmosphere through nitrification and denitrification reactions. The observations in the lakes show that N_2O is actively generated in the no oxigen layer. The similar process is likely to appear in the ocean.
Antarctic aerosols change seasonally in concentration and component. In summer aerosols are originated from DMS generated in the circum-continental ocean.
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