Rocket and ground-based study of an auroral breakup event

Details Rocket and ground-based study of an auroral breakup event Rocket and ground-based study of an auroral breakup event

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..207m&link_type=abstract

Planetary and Space Science, vol. 31, Feb. 1983, p. 207-211, 213-220. Research supported by the Swedish Board for Space Activit

Computer Science

Sound

19

Auroras, Ionospheric Disturbances, Magnetic Storms, Magnetospheric Instability, Rocket Sounding, Electric Fields, Energy Dissipation, Ionospheric Currents, Ionospheric Heating, Space Observations (From Earth)

Scientific paper

The results of ground observations as well as high resolution rocket electric field and particle observations during a breakup event of an intense magnetospheric substorm over northern Scandinavia are discussed. In particular, the characteristics of the substorm-associated electric field, ionospheric currents, and power dissipation during a time period of about 15 minutes after substorm onset are addressed. A comparison of the observations with those of a pre-breakup event earlier in the day (Marklund et al., 1982) showed that the ionospheric substorm-related electric field could be split up into two parts: (1) an ambient LT-dependent field, probably of magnetospheric origin; and (2) a small-scale electric field associated with the bright auroral structures, which is superimposed on the LT-dependent field. The consequences for the location of the ionospheric currents and the Joule energy dissipation relative to the auroral forms are discussed.

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