Heat flux and thermal conduction in O+ and H+ ion flows deduced from EISCAT-VHF radar observations in the high-latitude topside ionosphere

Details Heat flux and thermal conduction in O+ and H+ ion flows deduced from EISCAT-VHF radar observations in the high-latitude topside ionosphere Heat flux and thermal conduction in O+ and H+ ion flows deduced from EISCAT-VHF radar observations in the high-latitude topside ionosphere

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9911483w&link_type=abstract

Journal of Geophysical Research, Volume 99, Issue A6, p. 11483-11494

Physics

Plasma Physics

Ionosphere: Ionosphere/Magnetosphere Interactions, Ionosphere: Plasma Temperature And Density, Ionosphere: Polar Cap Ionosphere, Space Plasma Physics: Transport Processes

Scientific paper

With two periods of EISCAT-VHF radar observations, magnetically quiet and moderately disturbed, we have calculated the H+ and O+ heat fluxes in using formulae of Wu and Taieb (1993), accounting not only for temperature gradients but also for pressure gradients, velocity gradients, and diffusion-thermal effects. They correspond to different physical processes that are calculated and compared between them. Then, the general features of the H+ and O+ ion thermal conductions are studied during the two periods of observation in the high-latitude topside ionosphere. The analysis of the two periods of measurements revealed the following trends, to be confirmed by further observations: (1) During the two periods the H+ heat flux Q2 is always upward in the altitude range from 600 km up to about 1000 km. It is larger during the quiet period than during the disturbed period. (2) The most important dominant mechanism for H+ heat flux is the diffusion-thermal effect due to the H+-O+ collision, with a correcting term due to the H+ temperature gradient. (3) The O+ heat flux is always downward in the same altitude range during the two periods of observations. The absolute value during the disturbed period is slightly larger than that during the quiet period. (4) The dominant mechanism for O+ heat flux is its temperature gradient, corrected by the coupling with the H+ ion. (5) The O+ thermal conduction is less important during the quiet period than during the disturbed period, while for the H+ thermal conduction it is the contrary. (6) The H+ thermal conduction increases with altitude below about 1000 km.

Affiliated with

Also associated with

No associations

Rating

Heat flux and thermal conduction in O+ and H+ ion flows deduced from EISCAT-VHF radar observations in the high-latitude topside ionosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Heat flux and thermal conduction in O+ and H+ ion flows deduced from EISCAT-VHF radar observations in the high-latitude topside ionosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat flux and thermal conduction in O+ and H+ ion flows deduced from EISCAT-VHF radar observations in the high-latitude topside ionosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1505132