A HIGH-LATITUDE OBSERVATION OF SPORADIC SODIUM AND SPORADIC E-LAYER FORMATION

Authors
HEINSELMAN CJ THAYER JP WATKINS BJ
Citation
Cj. Heinselman et al., A HIGH-LATITUDE OBSERVATION OF SPORADIC SODIUM AND SPORADIC E-LAYER FORMATION, Geophysical research letters, 25(16), 1998, pp. 3059-3062
Citations number
14
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Geophysical research letters → ACNP
ISSN journal
00948276
Volume
25
Issue
16
Year of publication
1998
Pages
3059 - 3062
Database
ISI
SICI code
0094-8276(1998)25:16<3059:AHOOSS>2.0.ZU;2-3
Abstract
High-resolution radar and lidar measurements of sporadic sodium (Na-s) and sporadic E (E-s) layers were made at the Sondrestrom incoherent-s catter radar facility on 11 December 1997. These measurements suggest a causal link between E-s and Na-s, supporting the proposed mechanism in which Na+ ions in the E-s are neutralized to form the Na-s. This Na -s, by contrast, does not appear to have been formed by the presence o f auroral precipitation or ionization, and, in fact, the sodium densit y is seen to decrease during an auroral event.