Evidence for anomalous cowling conductivity in the strongly driven equatorial electrojet and a reconciliation of magnetic field data with theory
| dc.contributor.author | Kelley, Michael C. | |
| dc.contributor.author | Ilma, Ronald R. | |
| dc.contributor.author | Alken, Patrick | |
| dc.contributor.author | Maus, Stefan | |
| dc.date.accessioned | 2018-07-19T16:46:28Z | |
| dc.date.available | 2018-07-19T16:46:28Z | |
| dc.date.issued | 2009-08 | |
| dc.description.abstract | Several days of continuous incoherent scatter radar observations during the November 2004 magnetic superstorm are available, as well as data from the CHAMP [CHAllenging Minisatellite Payload] satellite magnetic fiel d detector. We have found that, for zonal electric fields greater than about 1 mV/m, the linear relationship between CHAMP-deduced electric fields and Jicamarca-measured electric fields breaks down. We find that the observed magnetic field is a factor of two smaller than expected for the largest zonal electric field (3.2 mV/m) observed simultaneously in time and nearby spatially with CHAMP. The fact that similar decreases in the effective conductivity occurred during both normal and counter-electrojet conditions indicates that Farley-Buneman waves must be the source of the physical mechanism for the reduced current. In addition, we provide an explanation for a long standing (more than 35 years) discrepancy between theory and (rocket) experiments, concerning the peak height of the electrojet and the magnetic field perturbation. The correction by a factor of four of the electron-neutral collision frequency thought to explain this problem is not necessary if the field line integrated conductivities are used. | es_ES |
| dc.description.peer-review | Por pares | es_ES |
| dc.format | application/pdf | es_ES |
| dc.identifier.citation | Kelley, M. C., Ilma, R. R., Alken, P., & Maus, S. (2009). Evidence for anomalous cowling conductivity in the strongly driven equatorial electrojet and a reconciliation of magnetic field data with theory. | es_ES |
| dc.identifier.uri | http://hdl.handle.net/20.500.12816/1976 | |
| dc.language.iso | eng | es_ES |
| dc.rights | info:eu-repo/semantics/restrictedAccess | es_ES |
| dc.subject | Electrical conductivity | es_ES |
| dc.subject | Electric fields | es_ES |
| dc.subject | Incoherent scattering radar | es_ES |
| dc.subject | Equatorial electrojet | es_ES |
| dc.subject | Magnetic fields | es_ES |
| dc.subject | Ionosphere | es_ES |
| dc.subject.ocde | http://purl.org/pe-repo/ocde/ford#1.05.01 | es_ES |
| dc.title | Evidence for anomalous cowling conductivity in the strongly driven equatorial electrojet and a reconciliation of magnetic field data with theory | es_ES |
| dc.type | info:eu-repo/semantics/preprint | es_ES |