Dragged Neutral --Campaign Observations with Fabry-Perot Interferometers and HF-radars in Alaska--

Details Dragged Neutral --Campaign Observations with Fabry-Perot Interferometers and HF-radars in Alaska-- Dragged Neutral --Campaign Observations with Fabry-Perot Interferometers and HF-radars in Alaska--

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa12a0673i&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SA12A-0673

Other

2407 Auroral Ionosphere (2704), 2427 Ionosphere/Atmosphere Interactions (0335), 2431 Ionosphere/Magnetosphere Interactions (2736), 2463 Plasma Convection

Scientific paper

In this presentation, we will introduce campaign observations with HF-radars and Fabry-Perot Interferometers in Alaska held on 2000/2001 in cooperated with CRL and GI/UAF. The main purposes of this project are (1) quantitative estimates of response of ion and neutral for the change of IMF Bz, (2)estimation of the role of vertical wind in large scale neutral circulation in the thermosphere, (3) Validity check of vector wind velocity deduced from the method of Conde and Smith [1998]. Locations of instruments are shown in the figure below. Two FPI (Scanning: CRL; All-sky: GI/UAF) are installed at Poker Flat. An all-sky FPI and a scanning FPI are installed at Eagle and Inuvik, respectively. We have got an initial result obtained on Nov. 24, 2000. On the beginning of the observation, 06:14:00UT, the directions of neutral and plasma flow were different from each other. Hereafter the plasma flow kept its direction northwestward from 06:56 to 08:52UT, and the neutral wind was gradually accelerated for the same direction. The plasma flow showed a vortical structure and changed it_fs direction rapidly after 08:52UT, while the neutral wind did not respond to the short-term variation. This result is consistent with many previous works.

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