Effects of Miyake volcanic effluents on airborne particles and precipitation in central Japan

Hikaru Satsumabayashi; Minoru Kawamura; Takao Katsuno; Katsumi Futaki; Kentaro Murano; Gregory R Carmichael; Mizuo Kajino; Mitsuaki Horiguchi; Hiromasa Ueda

doi:10.1029/2003JD004204

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Effects of Miyake volcanic effluents on airborne particles and precipitation in central Japan

Journal article

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Effects of Miyake volcanic effluents on airborne particles and precipitation in central Japan

Hikaru Satsumabayashi, Minoru Kawamura, Takao Katsuno, Katsumi Futaki, Kentaro Murano, Gregory R Carmichael, Mizuo Kajino, Mitsuaki Horiguchi and Hiromasa Ueda

Journal of Geophysical Research: Atmospheres, Vol.109(D19), pp.D19202-n/a

10/16/2004

DOI: 10.1029/2003JD004204

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Abstract

Miyake volcano, which is located in the northwest Pacific Ocean 200 km south of the Tokyo metropolitan area, began to erupt on 8 July 2000. Its SO2 emission amounted to a maximum of 6 × 104 t d−1, which was about the same level as the anthropogenic emission of northeast Asia and 20 times larger than that of Japan, and is decreasing to 104 t d−1. Aerosol and precipitation, together with gaseous pollutants, have been observed from 2 years before the eruption to present on a prominent mountain ridge, Happo ridge (330 km north of the volcano). Short time samplings of aerosols and gaseous acids, such as HCl and HNO3, were made for 3–6 hours every day. Annual mean concentration of SO2 was increased 3.8 times, and concentrations of SO42− were increased 1.5 and 1.7 times in aerosol and precipitation, respectively. In contrast, aerosol concentrations of NO3− and Cl− decreased under the influence of volcanic effluents. This was caused by the excess amount of SO42− formation. The produced SO42− at first exhausted gaseous ammonia to form (NH4)2SO4 aerosol and then, driving out NO3− and Cl−, it took their place in the aerosol and sometimes existed as sulfuric acid mist after exhausting ammonia. These facts were explained successfully by a multicomponent gas‐aerosol equilibrium. The expelled HNO3 and HCl might be deposited more intensively both by wet and dry deposition processes and might accelerate the environmental acidification.

Precipitation

middle troposphere

East Asia

volcanic effects

aerosols

Details

Title: Subtitle: Effects of Miyake volcanic effluents on airborne particles and precipitation in central Japan
Creators: Hikaru Satsumabayashi - Nagano Environmental Conservation Research Institute
Minoru Kawamura - Nagano Environmental Conservation Research Institute
Takao Katsuno - Nagano Environmental Conservation Research Institute
Katsumi Futaki - Nagano Environmental Conservation Research Institute
Kentaro Murano - National Institute for Environmental Studies
Gregory R Carmichael - University of Iowa
Mizuo Kajino - Kyoto University
Mitsuaki Horiguchi - Kyoto University
Hiromasa Ueda - Kyoto University
Resource Type: Journal article
Publication Details: Journal of Geophysical Research: Atmospheres, Vol.109(D19), pp.D19202-n/a
DOI: 10.1029/2003JD004204
ISSN: 0148-0227
eISSN: 2156-2202
Number of pages: 17
Language: English
Date published: 10/16/2004
Academic Unit: Civil and Environmental Engineering; Nursing; Chemical and Biochemical Engineering
Record Identifier: 9984003437502771

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