• Main Research Topics:
  When I entered Graduate school, it was the time people just began to worry about the stratospheric ozone depletion as one of earth's environmental problems. The very start of my research was to search for an evidence of ozone depletion on a global scale from the observational data. To understand the ozone variations, it is necessary to be familiar with subjects on atmospheric dynamics, photochemistry and radiation, thus a large variety of the scientific knowledge must be learned. The subject of my scientific interest was gradually broadened to include the troposphere as well as the stratosphere. Now I am trying to get atmospheric data by myself. With all these changes, I would like to maintain my approach method trying to understand the global variations of minor constituents from a meteorological point of view. I understand that it is a special privilege for us working in a university to extend our research topic referring to the request from students. So the subject to be covered could be eventually widened, but the following is is a list of research subject I'm working with:
  • Ozone and water vapor variations in the tropics: I jointly promote an international project named SOWER.
  • Global analysis of atmospheric minor constituents using satellite data: Satellite data is extremely useful to describe global scale atmospheric phenomena.
  • Description of atmospheric circulation field with a Lagrangian framework: I would like to contribute my effort to construct Lagrangian atmospheric circulation field to better understand variations in atmospheric constituents.
  • The effect of the ozone feedback in driving the Quasi-Biennial Oscillation in the equatorial stratosphere: The interaction between dynamics, radiation and chemistry could be essentially important.
  • Variation of stratospheric ozone and circulation fields in midlatitudes (associated with COE program): We got interesting results on the long-term trend of stratospheric ozone and circulation field from the analysis of ozonesonde data over Japan (Master of Science thesis of Yu Yoshikura).
• Field to be Covered in the Near Future:
  
  • 4-D assimilation of atmospheric constituents: Active research field in the world, but we are still left behind in Japan.
  • Meteorological forecast in Ecuador: This came from SOWER activity. I would like to contribute something to INAMHI, Ecuador and the understanding of tropical circulation field, though I'm not a specialist of numerical weather forecast.

• SOWER Activities
• Cryogenic Air Sampling
• Scientific Papers

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Visitors since April 1, 2005