The Relative Contributions of Electric Field Ionospheric Conductance to the Auroral Electrojets

Details The Relative Contributions of Electric Field Ionospheric Conductance to the Auroral Electrojets The Relative Contributions of Electric Field Ionospheric Conductance to the Auroral Electrojets

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jass...17...87c&link_type=abstract

Journal of Astronomy and Space Sciences, vol. 17, no. 1, p. 87-98.

Astronomy and Astrophysics

Astronomy

Scientific paper

We examine the relative contributions of the electric field and ionospheric conductance to the auroral electrojets. For this purpose we used magnetometer data obtained from the International Magnetospheric Study (IMS) meridian chains of observatories for March 17, 18, and 19, 1978. Based on the study by Allen & Kroehl (1975), we redefine the AU and AL indices by utilizing the magnetic disturbance data obtained from the AE stations located within limited magnetic local time (MLT) sectors; i.e., 1500 MLT 1800 and 0000 MLT 0300, respectively. The current densities of the eastward and westward electrojets are calculated based on the AU and AL indices thus defined. Under the assumption that the Hall conductance at the dusk sector is mainly caused by the solar EUV radiation, we estimate the electric field contribution to the AU index. Assuming further that electric field distributions at dawn and dusk sectors are comparable, it is also possible to estimate the contribution of the Hall conductance associated with auroral particle precipitation to the AL index. From this study it is noted that the electric fields and Hall conductances thus estimated show significant correlations with the AU and AL indices, respectively, suggesting that the AU and AL indices are closely associated with the directly driven and loading-unloading processes of substorms.

Affiliated with

Also associated with

No associations

Rating

The Relative Contributions of Electric Field Ionospheric Conductance to the Auroral Electrojets 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 The Relative Contributions of Electric Field Ionospheric Conductance to the Auroral Electrojets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Relative Contributions of Electric Field Ionospheric Conductance to the Auroral Electrojets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1350631