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A1.6 Observational Studies on the Coupling of Dynamical and Chemical Processes In theMiddle Atmosphere EFF Fellow Parameswaran S. Namboothiri

[Contact Person]

Nobuo Sugimoto
Head of Upper Atmospheric Environment Section
Atmospheric Environment Division
National Institute for Environmental Studies
16-2 Onogawa, Tsukuba, Ibaraki 305-0053, Japan
Tel.: 81-298-51-611l, Fax: 81-298-51-4732
E-mail: nsugimot@nies.go.jp

Total Budget for FY 1996-FY 1998:

5,400,000 Yen

Abstract

Temperature profiles collected with the NIES ozone lidar system are used for the study of gravity waves in the middle atmosphere. The study implies that the vertical variation of the amplitudes of temperature/density perturbation profiles is an important tracer of gravity waves in the middle atmosphere. It is observed that the vertical growth of the potential energy spectral density ceases near the broadband convection instability saturated limit. The study also focuses the role of structure of the stratopause in upward propagation of gravity waves. It suggests that large time variations in the gravity wave activity in the mesosphere can be correlated with variations in the stratopause structure.

[Key Words]

Rayleigh lidar, Temperature, Gravity waves