Observations of high latitude ion outflows with the EISCAT incoherent scatter radars and the FAST spacecraft

Details Observations of high latitude ion outflows with the EISCAT incoherent scatter radars and the FAST spacecraft Observations of high latitude ion outflows with the EISCAT incoherent scatter radars and the FAST spacecraft

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm31c..06w&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM31C-06

Physics

Plasma Physics

[2776] Magnetospheric Physics / Polar Cap Phenomena, [6969] Radio Science / Remote Sensing, [7846] Space Plasma Physics / Plasma Energization, [7867] Space Plasma Physics / Wave/Particle Interactions

Scientific paper

The escape of heavy ions from the upper atmosphere is an important process through which planetary atmospheres are lost, and plays an important role in determining the mass and energy density of the overlying magnetosphere. This additional mass can affect the transport of magnetospheric energy by MHD waves and the energy density of the magnetospheric plasma. Detailed observations of such outflow events are required in order to establish the physical processes, such as energy input from precipitating electrons, the convection electric field and wave-particle interactions that can accelerate the heavy ions so they can overcome the effects of gravity. An important question to be addressed is whether ion-frictional heating or ambipolar electric fields set up by electron precipitation into the ionosphere is the main cause of the initial ion upwelling, which is then subsequently accelerated by some form of wave-particle interaction. Incoherent scatter radars offer a unique diagnostic of ionospheric composition and vertical motion, and a significant database of conjunctions between the EISCAT Svalbard and mainland radars in the Scandinavian sector and overpasses of the FAST spacecraft has been examined to address this problem. This presentation will present the results of these studies.

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