Computer Science – Sound
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm51b1293l&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM51B-1293
Computer Science
Sound
2431 Ionosphere/Magnetosphere Interactions (2736), 2481 Topside Ionosphere, 2704 Auroral Phenomena (2407)
Scientific paper
The SIERRA nightside auroral sounding rocket made observations of the origins of ion upflow, at low altitudes (below 700 km), low scale height (densities above 20,000/cc), and low energies (10 eV.) Upflowing ions with bulk velocities up to 2 km/s are seen in conjunction with the poleward edge of a nightside substorm arc. The upflow is limited within the poleward edge to a region (a) of northward convection and (b) where Alfvenic and Pedersen conductivities are well-matched, leading to good ionospheric transmission of Alfvenic power. Also throughout the poleward edge, precipitation of moderate-energy (100s of eV) protons and oxygen is observed. This population is interpreted as reflection from a higher altitude field aligned potential of upgoing transversely heated ion conics. Details of this case study observation of the seeds and evolution of auroral ion outflow are presented as an example for testing of models of ionospheric/magnetospheric coupling.
Arnoldy Roger
Kintner Paul
Klatt Eric
LaBelle James
Lynch Kristina Anne
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