Seasonal Variation in the Mesospheric Gravity-Wave Potential Energy Over the Antarctic Peninsula

Details Seasonal Variation in the Mesospheric Gravity-Wave Potential Energy Over the Antarctic Peninsula Seasonal Variation in the Mesospheric Gravity-Wave Potential Energy Over the Antarctic Peninsula

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsa14a..03e&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #SA14A-03

Other

0342 Middle Atmosphere: Energy Deposition, 0343 Planetary Atmospheres (5405, 5407, 5409, 5704, 5705, 5707), 5409 Atmospheres: Structure And Dynamics, 6007 Atmospheres: Structure And Dynamics

Scientific paper

As part of a joint programme between the University of Illinois and the British Antarctic Survey, Rayleigh and Fe resonance lidar observations have been made from Rothera Station (68S, 68W) on the Antarctic peninsula. Gravity wave perturbations in both the vertical density and temperature structure have been measured, and the seasonal variation of the gravity-wave potential energy has been compiled. In addition, the phase change of the waves with altitude has been used to assess the relative contributions of stationary mountain waves and horizontally propagating gravity waves to the overall potential-energy budget. It has been found that the seasonal changes in the overall wave energy near the mesopause are consistent with the filtering of the gravity wave flux by the stratospheric winds,. The seasonal variations in the ratio of mountain waves to horizontally propagating waves has been correlated to changes in the tropospheric wind field over the Trans-Antarctic Mountains. The impact of this partitioning and its seasonal variation on the forcing of the mesospheric wind field will be discussed.

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