Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2837k&link_type=abstract
Geophysical Research Letters, Volume 27, Issue 18, p. 2837-2840
Physics
13
Ionosphere: Electric Fields, Ionosphere: Ionospheric Disturbances, Ionosphere: Midlatitude Ionosphere
Scientific paper
Using a combination of airglow images and incoherent scatter radar data, we have explored the electrical structure of the airglow depleted, height layer bands over a mid-latitude site. We find a reproducible electrical signature in both components of the electric field in all events studied. The most pronounced feature is a large northward/upward electric field in the heart of the structure. The latter is identical to the radially outward field reported for mid-latitude conjugate electric fields [Saito et al., 1995], found to trace the poleward edge of the equatorial anomaly. We favorably compare the Arecibo drift to a typical satellite event. These electric fields may reflect a nonlinear evolved state of the Perkins instability or some, as yet, unexplained coupling between atmospheric motion and the plasma embedded in it. We show here that the F-region Pedersen conductivity is much lower in these structures than outside and suggest that this is related to a polarization electric field inside the structure.
Aponte Nestor
González Sixto A.
Kelley Michael C.
Makela Jonathan J.
Saito Akinori
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