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Title
  • en Precise remote-monitoring technique of water volume and temperature of a crater lake in Aso volcano, Japan : implications for a sensitive window of a volcanic hydrothermal system
Creator
    • en Terada, Akihiko
    • en Kagiyama, Tsuneomi
    • en Sasaki, Hisashi
Accessrights open access
Subject
  • Other en Crater lake
  • Other en hydrothermal system
  • Other en digital surface model
  • Other en digital camera
  • Other en Aso volcano
  • NDC 450
Description
  • Abstract en A high-resolution Digital Surface Model and a commercial digital camera have enabled precise and continuous monitoring of the crater lake at Aso volcano. From July 2006 onwards, infrared (IR) thermometry has been used with this system, enabling more accurate measurements of lake volume and temperature based on simple and intensive observations than has been possible in any other previous studies. The heat discharge remained largely constant at approximately 220 MW, with the exception of an abrupt increase to 280 MW that coincided with a rapid decrease in the water level in August 2007. Simultaneously, an increase in temperature at a shallow depth was suggested by other observations. The crater lake was found to respond to even slight changes in volcanic fluid supply, which can be well quantified by our method. Thus, a crater lake can be monitored more precisely than subaerial fumaroles whose energy estimation is often accompanied by large uncertainties. Our monitoring technique of a crater lake provides information on the subsurface hydrothermal system beneath it, for which any in-situ measurements are practically impossible.
Date
    Issued2008
Language
  • eng
Resource Type journal article
Version Type VoR
Identifier HDL http://hdl.handle.net/2115/67565
Relation
  • isIdenticalTo DOI https://doi.org/10.1186/BF03353134
Journal
    • EISSN 1880-5981
      • en Earth, Planets and Space
      • Volume Number60 Issue Number6 Page Start705 Page End710
File
Oaidate 2023-07-26