Gravity waves and instabilities in the ionosphere imaged by the Optical Mesosphere Thermosphere Imagers (OMTIs)

Details Gravity waves and instabilities in the ionosphere imaged by the Optical Mesosphere Thermosphere Imagers (OMTIs) Gravity waves and instabilities in the ionosphere imaged by the Optical Mesosphere Thermosphere Imagers (OMTIs)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa31a1714s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA31A-1714

Physics

[2415] Ionosphere / Equatorial Ionosphere, [2427] Ionosphere / Ionosphere/Atmosphere Interactions, [2435] Ionosphere / Ionospheric Disturbances, [2437] Ionosphere / Ionospheric Dynamics

Scientific paper

This paper provides some recent observations of coupling processes from the lower atmosphere to the ionosphere on the basis of optical measurements of airglow by the Optical Mesosphere Thermosphere Imagers (OMTIs). The OMTIs measure two-dimensional structures of the upper atmosphere, Doppler wind, and temperature through airglow emissions from oxygen (wavelength: 557.7 nm) and OH (near infrared band) in the mesopause region (80-100 km) and from oxygen (630.0 nm) in the thermosphere/ionosphere (200-300 km), at Norway, Canada, far-eastern Russia, Japan, Indonesia, and Australia. In 2010, three Fabry-Perot interferometers are to be installed in Thailand, Indonesia, and Australia, to measure thermospheric neutral wind pattern at two pairs of geomagnetic conjugate stations at low latitudes. In the presentation we show some recent results obtained by OMTIs, particularly for the dynamics of gravity waves and plasma instabilities in the ionosphere, which are identified as medium-scale traveling ionospheric disturbances (MSTIDs) at subauroral and equatorial latitudes. We also show some preliminary results from the conjugate observation of thermospheric winds by the Fabry-Perot interferometers.

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