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Article
Sulfur dioxide and particles in quiescent volcanic plumes from Poás, Arenal, and Colima Volcanos, Costa Rica and Mexico
Journal of Geophysical Research
  • T. Casadevall, U.S. Geological Survey
  • William I. Rose, Michigan Technological University
  • William H. Fuller, NASA Langley Research Center
  • William H. Hunt, NASA Langley Research Center
  • Mark A. Hart, University of Arizona
  • Jarvis L. Moyers, University of Arizona
  • David C. Woods, NASA Langley Research Center
  • Raymond L. Chuan, Brunswick Corporation
  • James P. Friend, Drexel University
Document Type
Article
Publication Date
10-20-1984
Abstract
Measurements of SO2 emission rates and concentrations and of particle distribution, size, shape, and composition were made in quiescent volcanic plumes emitted into the troposphere from Poás and Arenal volcanos, Costa Rica, and Colima volcano, Mexico. SO2 emission rates were 700±180 metric tons per day (t/d) for Poás, 210±30 t/d for Arenal, and 320±50 t/d for Colima. The concentrations of SO2 calculated from the COSPEC/lidar data were 5–380 ppb. Concentrations of SO2measured directly by flame photometry were 10–250 ppb. Particles collected in the plumes with a quartz crystal microbalance impactor were mostly less than 3 μm in diameter and consisted of droplets of dilute sulfur-bearing solutions and minor amounts of larger silicate particles coated with a sulfur-bearing film or crust. Total particle concentrations were 4.7 μg/m3 for Poás and 18.8 μg/m3for Colima. Comparison of concentrations of SO2 in the plumes with gas samples collected at fumaroles on the ground suggests that the plumes are diluted by the atmosphere by factors of up to 105.
Publisher's Statement

Copyright 1984 by the American Geophysical Union. Publisher's version of record: https://dx.doi.org/10.1029/JD089iD06p09633

Citation Information
T. Casadevall, William I. Rose, William H. Fuller, William H. Hunt, et al.. "Sulfur dioxide and particles in quiescent volcanic plumes from Poás, Arenal, and Colima Volcanos, Costa Rica and Mexico" Journal of Geophysical Research Vol. 89 Iss. D6 (1984) p. 9633 - 9641
Available at: http://works.bepress.com/william-rose/134/