Abstract
Regular ionosonde observations from Tromsø (69°N 19°E) date from 1935 and the dataset thus represents one of the longest in existence. Trends in the critical frequency of the ionospheric F2 layer are determined and found to be negative. Our results lend support to a causative mechanism which includes greenhouse cooling.
Original language | English |
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Article number | 2128 |
Journal | Geophysical Research Letters |
Volume | 29 |
Issue number | 23 |
DOIs | |
Publication status | Published - 1 Dec 2002 |
Bibliographical note
Publisher Copyright:© Copyright 2002 by the American Geophysical Union.
ASJC Scopus subject areas
- Geophysics
- General Earth and Planetary Sciences