All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Geophysical Research Letters

Volume

11

Issue

9

Publication Date

1984

First Page

895

Last Page

898

DOI

10.1029/GL011i009p00895

Abstract

First results are reported of a comprehensive campaign to measure ionospheric structure and dynamics of nighttime polar cap F‐layer or F‐region arcs. Airborne optical and digital ionosonde data were collected simultaneously with ground based incoherent scatter radar data, continuously over many hours in time and 500 to 1000 km in space. Polar cap F‐region sub‐visual auroral arcs, which are commonly observed during quiet magnetic conditions, are found to represent boundaries (or shears) in the polar cap plasma circulation pattern. F‐region electron concentration enhancements are found in these features and can be of significance to polar thermospheric circulation, composition, and thermal structure. The quiet polar ionosphere is so structured that high time resolution intensified optical images of thermospheric emmissions can make a major contribution to interpretation of incoherent scatter radar data.

Comments

Published by the American Geophysical Union in Geophysical Letters. Publisher PDF is available for download through link above.