Abstracts (PDF) - Sodankylä Geophysical Observatory
Abstracts (PDF) - Sodankylä Geophysical Observatory
Abstracts (PDF) - Sodankylä Geophysical Observatory
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29<br />
An enhancement of the airglow brightness by the gravity waves<br />
Nikolaishvili, Sergey 1 and Belyaev, Alexey 1<br />
1 Institute of Applied Geophysics, Moscow, Russia<br />
Abstract<br />
The global observations of the O 2 atmospheric band nightglow performed by the high resolution Doppler imager<br />
(HRDI) on the Upper Atmosphere Research Satellite (UARS) have shown bright regions of the nightglow. It was<br />
supposed that these regions are caused either by meridional circulation, or by descending motion associated with<br />
tides and gravity wave (GW) forcing. In this study we describe and speculate an additional mechanism of the<br />
brightness enhancement. It is nonlinear enhancement of the entire emission layer caused by GWs passing through<br />
one. Its magnitude is proportional to the square of the GW amplitude. We speculate this effect as an emission layer<br />
response to the GW disturbance. To estimate the magnitude of this effect we use the global two-dimensional model<br />
of the zonally averaged circulation.<br />
http://www.sgo.fi/38AM/abstracts/38am-abstracts.pdf 17th August 2011
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