Total current of the auroral electrojet estimated from the IMS Alaska meridian chain of magnetic observatories |
| |
| Authors: | Y Kamide S-I Akasofu B-H Ahn W Baumjohann JL Kisabeth |
| |
| Institution: | Geophysical Institute, University of Alaska, Fairbanks, 903 Koyukuk Avenue North, Fairbanks, AK 99701, U.S.A.;Institut für Geophysik der Universität Münster, Gievenbecker Weg 61, D-4400 Münster, Federal Republic of Germany;Exploration Research Division, Geophysical Research and Development, Continental Oil Company, Ponca City, OK 74601, U.S.A. |
| |
| Abstract: | Based on magnetic data from the IMS Alaska meridian chain of observatories, the total current of the westward auroral electrojet flowing across the meridian is estimated by using two independent methods. The first one is a simple integration of the north-south component of magnetic perturbations along the meridian, providing the quantity F in units of nT·km. The other is to use the forward method, providing the total current I in units of A. It is shown that F and I have nearly identical time variations. Thus, by normalizing the two quantities and taking the numerical value of F in units of nT·km, it is possible to estimate the total electrojet current flowing across a magnetic meridian, with an accuracy of 90%, by using the latitudinal profile of the H component, namely I (A) = 2.0 F (nT·km). |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
