HR: 1340h
AN: A23B-0947    [Abstracts]
TI: Short-term Variations of Stratospheric Ozone Measured by Using a Ground-based Millimeter-wave Radiometer at Rikubetsu, Japan
AU: * Nagahama, T
EM: nagahama@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, 3-13 Honohara, Toyokawa, 442-8507 Japan
AU: Mizuno, A
EM: mizuno@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, 3-13 Honohara, Toyokawa, 442-8507 Japan
AU: Sugimoto, T
EM: sugimoto@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, 3-13 Honohara, Toyokawa, 442-8507 Japan
AU: Nakane, H
EM: nakane@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506 Japan
AU: Fujinuma, Y
EM: fujinuma@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506 Japan
AU: Ogawa, H
EM: ogawa@p.s.osakafu-u.ac.jp
AF: Department of Physical Science, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, 599-8531 Japan
AU: Fukui, Y
EM: fukui@a.phys.nagoya-u.ac.jp
AF: Department of Astrophysics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602 Japan
AB: We present recent results based on the monitoring of the stratospheric ozone with a ground-based millimeter-wave radiometer at Rikubetsu (43.5N, 143.8E) conducted at the National Institute for Environmental Studies (NIES), Japan. We have been measuring vertical profiles of ozone in the stratosphere and mesosphere with the millimeter-wave radiometers since November 1999. The radiometer is equipped with a superconducting (SIS) mixer receiver that provides an extremely low noise temperature and with an acousto-optical spectrometer whose bandwidth is 500 MHz. The ozone spectrum was obtained every 5 minutes with sufficient signal-to-noise ratio. The vertical profiles of ozone mixing ratio were retrieved with the optimal estimation method and its coverage in altitude ranges from 22 to 64 km. From the measurements, we clearly detected various short-term variations of ozone mixing ratio in the stratosphere. At 22 km, we found that an ozone variation with a few days period in winter/spring season. The amplitude of the variation is typically 0.3% of the annual ozone average. This ozone variation is well correlated with change of geopotential height at 200 hPa, suggesting that vertical motion near the tropopause is affected to the ozone variation at 22 km. In addition, the ozone variations below 30 km in winter/spring show well correlation with transport of the polar air masses. In this presentation, further details of the ozone variations and relations with other dynamical parameters will be shown.
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005