First observations of simultaneous interhemispheric conjugate high-latitude thermospheric winds

Details First observations of simultaneous interhemispheric conjugate high-latitude thermospheric winds First observations of simultaneous interhemispheric conjugate high-latitude thermospheric winds

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11509328k&link_type=abstract

Journal of Geophysical Research, Volume 115, Issue A9, CiteID A09328

Physics

1

Ionosphere: Ionosphere/Atmosphere Interactions (0335), Ionosphere: Auroral Ionosphere (2704), Ionosphere: Ionospheric Dynamics, Magnetospheric Physics: Auroral Phenomena (2407)

Scientific paper

We report the first observations of simultaneous high-latitude interhemispheric F region neutral wind fields by combining the 630 nm optical measurements from two scanning Doppler imagers (SDIs) and three Fabry-Perot interferometers (FPIs) for a period exceeding 5 h. From the Southern Hemisphere, a SDI at Mawson and a FPI at Davis, both in Antarctica, are geomagnetically mapped onto the Northern Hemisphere. These data are combined in the Northern Hemisphere with a SDI at Longyearbyen, Svalbard, and two FPIs near Kiruna in Sweden and Sodankyla in Finland. Geomagnetic conditions were moderate (Kp = 3--3+) and steady although the interplanetary magnetic field Bz component did change polarity several times. There is good agreement between the conjugate 630 nm optical intensities and wind vectors where the two SDIs' fields of view overlap. All wind field vectors are overlaid onto the northern Super Dual Auroral Radar Network ion convection contours. Qualitatively, the agreement between neutral and ion flow is remarkably good throughout the study interval, even down to mesoscale spatial size.

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