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A-1.2.3 Analysis of Ozone change with ozonesonde observations at Tsukuba

[Contact Person]

Masaatsu Miyauchi
Head
Ozone Layer Monitoring Office
Atmospheric Environment Division
Observations Department
Japan Meteorological Agency(JMA)
1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100- 8122, Japan
Tel:+81-3-3287-3439 Fax:+81-3-3211-4640
E-mail:ozone@hq.kishou.go.jp

Total Budget for FY1996-FY1998

11,117,000 Yen (FY1998; 3,729,000Yen)

Abstract

A special campaign of ozonesonde observation was carried out at the Acrological Observatory (Tsukuba) from winter through spring to make clear the mechanism of ozone layer variation in the mid-latitudes. In the northern high latitudes a severe ozone loss was observed due to the steady polar vortex in spring of 1997. A layer with less ozone was also observed over Tsukuba when a patch of broken polar vortex passed over Tsukuba in May. Such a large ozone depletion was not found in spring of 1998 and 1999 in the northern high latitudes.
However, in 1999 a relatively large ozone decrease is observed over Tsukuba. Backward trajectory analysis proved that the cause is different from that of 1997, due to advection of air with less ozone from the low latitudes. Effects of quasi-biennial oscillation(QBO) are suggested.

[Key Words]

Ozone change, Ozonesonde, Polar Vortex