WIT Press


Change Of Aerosol And Precipitation In The Mid Troposphere Over Central Japan Caused By Miyake Volcano Effluents

Price

Free (open access)

Volume

74

Pages

10

Published

2004

Size

770 kb

Paper DOI

10.2495/AIR040151

Copyright

WIT Press

Author(s)

H. Ueda, M. Kajino & H. Satsumabayashi

Abstract

Miyake volcano began to erupt on 8 July 2000. Its SO2 emission amounted to a maximum 6×104 ton per day, which is equivalent to the total anthropogenic emission in northeast Asia and is 20 times larger than that of Japan. It has then decreased gradually but remains at a level of 104 ton per day even now. Here airborne volatile-component partitioning among gas, aerosols and raindrops caused by the volcanic effluents and evidence of its change were investigated by continuous observation of aerosols, together with gas and precipitation measurements, on a prominent mountain ridge and from analysis based on a multicomponent thermodynamic equilibrium model. The volcanic SO2 is converted to sulphate aerosols in the atm

Keywords