Net field-aligned currents observed by Triad

Sugiura, M.; Potemra, T. A.

doi:10.1029/ja081i013p02155

Cited by 109 publications

(59 citation statements)

References 23 publications

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“…By 1975, the first hints that the current sheets did not provide balanced flow when integrated along a meridian were coming to light. These results are summarized in a study by SUGIURA (1976a). SUGIURA (1975) andYA5UHARA et al (1975) both utilized polar orbiter magnetometer data to show that there was an excess of current into the ionosphere in the pre-noon quadrant and an excess of current out of the ionosphere in the dusk sector.…”

Section: Field-aligned Currents and Ionospheric Electrojet Currents Imentioning

confidence: 99%

Electric and magnetic fields in the ionosphere and magnetosphere.

Rostoker

1978

J. geomagn. geoelec

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Recent observations of electric fields in the ionosphere using various measurement techniques have led to important advances in the understanding of magnetosphere-ionosphere coupling. In particular the discovery of evidence for parallel electric fields in the altitude range 2,000-10,000 km has an important impact on the question of auroral acceleration processes. More detailed mapping of large scale field-aligned current configurations on field lines penetrating the auroral oval are leading to more complete models for the generator processes in the outer magnetosphere which are associated with energy dissipation in the near-earth environment. Recent observations of significant electric fields equatorward of the auroral oval indicate that significant interaction between the magnetosphere and ionosphere takes place outside of the auroral oval. New techniques are presently being developed for more quantitative studies of magnetosphere-ionosphere coupling.

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Section: Field-aligned Currents and Ionospheric Electrojet Currents Imentioning

confidence: 99%

Electric and magnetic fields in the ionosphere and magnetosphere.

Rostoker

1978

J. geomagn. geoelec

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“…Snch currents are in the range actually observed over the polar ionosphere (Sugiura and Potemra, 1976).…”

Section: Original Page Is Of Poor Qualitymentioning

confidence: 53%

A new theory of sources of Birkeland currents

Cole

1984

Magnetospheric Currents

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“…The original of these electric fields was attributed to several possible physical mechanisms, of which double layers (BLOCK, 1972), anomalous resistivity (PAPADOPOULOS, 1977), and electrostatic shocks (SWIFT, 1975) appeared to be promising candidates. The field-aligned currents identified in early studies by ZMUDA et al (1967) had come under intense studies in the mid 1970's, and their character had been explored in detail by SUGIURA and POTEMRA (1976) and IIJIMA and POTEMRA (1976a, b) using Triad magnetometer data and by MCDIARMID et al (1977) using Isis 2 satellite magnetometer data. At that time, although the complex structure of the currents in the evening sector had been unravelled by ROSTOKER et al (1975), the definition of the character of the field-aligned currents near local noon was still an outstanding problem.…”

Section: Internationalmentioning

confidence: 99%

Recent advances in the study of electric and magnetic fields in the ionosphere and magnetosphere.

Rostoker

1980

J. geomagn. geoelec

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In the past two years there have been major advances in two areas. Firstly the nature of the DPY current system in the region of the polar cleft (cusp) has been more clearly defined through the use of the polar orbiters Triad and ISIS 2. It was now clear that field-aligned currents bound an ionospheric electrojet whose direction of the flow is regulated by the polarity of the By component of the interplanetary magnetic field. A second major advance has been in the development of comprehensive three-dimensional current system models which are capable of reproducing high latitude magnetic field perturbations. Work of this nature has been carried out in the U.S.S.R. and Canada, while investigations as to the driving mechanism for the current systems have been carried out in the U.S.A. and in Japan. Considerable progress continues to be made in defining the phenomonology of parallel electric fields in the altitude range 2,000-10,000km and in the development of the theory for explaining the acceleration mechanisms. The STARE radar system has now provided a powerful tool for the study of spatial and temporal variations of ionospheric electric fields; the use of the STARE data together with data from the European magnetometer arrays operating in Scandinavia during the IMS provides an outstanding opportunity to make major breakthroughs in the next few years.

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Net field-aligned currents observed by Triad

Cited by 109 publications

References 23 publications

Electric and magnetic fields in the ionosphere and magnetosphere.

Electric and magnetic fields in the ionosphere and magnetosphere.

A new theory of sources of Birkeland currents

Recent advances in the study of electric and magnetic fields in the ionosphere and magnetosphere.

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