Simultaneous Mesospheric Gravity Wave Observations and OH (3,1) Rotational Temperature Measurements over South Pole, Antarctica

Details Simultaneous Mesospheric Gravity Wave Observations and OH (3,1) Rotational Temperature Measurements over South Pole, Antarctica Simultaneous Mesospheric Gravity Wave Observations and OH (3,1) Rotational Temperature Measurements over South Pole, Antarctica

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51a1917p&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA51A-1917

Other

[3332] Atmospheric Processes / Mesospheric Dynamics, [3389] Atmospheric Processes / Tides And Planetary Waves, [3394] Atmospheric Processes / Instruments And Techniques

Scientific paper

The unique location of the South Pole station (within the polar vortex and far from any convective or orographic sources) combined with its high altitude (2900m) makes it an excellent site for investigating the dynamics and impact of mesospheric gravity waves over the Antarctic continent. Since 2010, two collocated instruments have continuously operated at this site during the Austral winter season (from mid-April to end of August): a recently developed Advanced Mesospheric Temperature Mapper (AMTM), which measures the IR (1.5μm) OH (3,1) rotational temperature and band intensity with high precision (1K in less than 1 min), and a near-IR (0.95μm) all-sky imager which provides the characteristics of the short-period gravity waves propagating over the station, including horizontal wavelength, propagation direction, observed period and phase speed. Our initial measurements have revealed a remarkably rich mesospheric wave environment containing a broad spectrum of waves, from short-period (<1h) gravity waves to tidal oscillations and planetary wave signatures. In this presentation we will describe recent results obtained over the past two winter seasons and contrast them with previous findings from other high-latitude sites.

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