Aerial Observations and Ground-based Measurements of Long-range Trans-boundary Air Pollution

DOI Web Site 1 Citations 39 References
  • Hatakeyama Shiro
    Institute of Agriculture, Tokyo University of Agriculture and Technology

Bibliographic Information

Other Title
  • 長距離越境大気汚染の解明を目指した航空機および地上観測
  • チョウキョリ エッキョウ タイキ オセン ノ カイメイ オ メザシタ コウクウキ オヨビ チジョウ カンソク

Search this article

Abstract

Aerial observations of atmospheric pollutants over the main land China and ground-based observations of long-range trans-boundary pollutants at a newly built observation site, CHAAMS (Cape Hedo Atmosphere and Aerosol Monitoring Station) were reviewed. Aerosols collected over the main land China were usually well neutralized contrary to our expectation. Sulfate exceeded ammonium in the western part but ammonium exceeded sulfate in the eastern part. It was speculated that the emission of ammonia gas in eastern China is much larger than SO2 emission. Nitrate in aerosols was mainly contained in coarse particles at Cape Hedo, Okinawa. It was quite different from the situation observed in China, where most of nitrate was contained in fine particles. The most important reason for this is thermal instability of ammonium nitrate during the long-range transport. Ammonium nitrate formed in China as fine particles decomposed again to ammonia gas and nitric acid gas. Then, nitric acid gas must have deposited onto coarse particles such as sea salts and/or dust particles.

Journal

Citations (1)*help

See more

References(39)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top