Premium
Evidence of naturally occurring wave‐wave interactions in the polar ionosphere and its relation to naturally enhanced ion acoustic lines
Author(s) -
Strømme A.,
Belyey V.,
Grydeland T.,
La Hoz C.,
Løvhaug U. P.,
Isham B.
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl020239
Subject(s) - ionosphere , incoherent scatter , polar , radar , physics , geophysics , computational physics , scattering , ion , geology , atmospheric sciences , optics , astronomy , telecommunications , computer science , quantum mechanics
In this paper we offer the first study of seldom‐recorded naturally occurring wave‐wave interactions in the polar ionosphere, using the first such data set acquired with the EISCAT Svalbard Radar (ESR). The simultaneous and co‐located observations of enhancements in the ion and plasma lines can only be explained in terms of wave‐wave interactions taking place within the scattering volume. These measurements strengthen previous indications that Langmuir turbulence triggered by a low energy electron beam associated with the aurora is probably the source of many of the Naturally Enhanced Ion Acoustic Lines (NEIAL) observed with incoherent scatter radars over the last decade.