SIGNS OF ANOMALOUS BEHAVIOR OF THE IONOSPHERE IN 2003–2014 AT F1-LAYER HEIGHTS OVER IRKUTSK
Journal Title: Solar-Terrestrial Physics - Year 2021, Vol 7, Issue 2
Abstract
We have detected an anomalous electron density Ne increase in winter months in Irkutsk in some years of the period 2003–2014. This effect was manifested when we compared the experimental values obtained by the Irkutsk ionosonde with model calculations at F1-layer heights (120–200 km). Two anomalous time zones have been found. The first was observed in the period 2003–2006 near solar minimum. In this zone, 2003 is the year of maximum manifestation of the winter Ne increase over the entire research period. The second anomalous zone — 2012, 2013, 2014 — was detected during solar maximum. We have explored possible causes of the Ne change in winter at the F1-layer heights in all the years under study. We have found that the main factor causing the winter increase in Ne is significant geomagnetic disturbances in the above time periods.
Authors and Affiliations
Kushnarenko G. P. , Yakovleva O. E. , Kuznetsova G. M.
Keywords
Related Articles
- EP ID EP697556
- DOI 10.12737/stp-72202108
- Views 145
- Downloads 0
ON THE FORMATION OF THE F1 LAYER DURING SUDDEN STRATOSPHERIC WARMING EVENTS
Using vertical sounding data obtained by the Irkutsk digisonde DPS-4 from 2003 to 2016, we have studied the frequency of occurrence of the F1 layer in winter conditions. The frequency of occurrence of the F1 layer in Dec...
STUDYING 630 NM ATOMIC OXYGEN EMISSION SOURCES DURING STRONG MAGNETIC STORMS IN THE NIGHT MID-LATITUDE IONOSPHERE
We analyze significant increases in 630 nm atomic oxygen night emissions during very strong geomagnetic storms, using optical measurements, theoretical modeling, and magnetogram inversion technique (MIT) data. It is show...
FEATURES OF THE INITIAL STAGE OF FORMATION OF FAST CORONAL MASS EJECTION ON FEBRUARY 25, 2014
We have analyzed the fast coronal mass ejection (CME) that occurred on February 25, 2014. The analysis is based on images taken in the 131, 211, 304, and 1700 Å UV channels of the SDO/AIA instrument and from observations...
LONG-LIVED METEOR TRAILS
The paper presents data on long-lived (~20–40 min) meteor trails. We describe a group of soliton-type meteor trails expanding at transonic speeds. Radio sounding data evidences that the latter include ~7–8 min ionization...
RESULTS OF JOINT OBSERVATIONS WITH SOLAR SPECTROPOLARIMETER OF METER RANGE WAVELENGTHS AND OTHER INSTRUMENTS
Solar radiation is emitted in the wide frequency range from gamma to radio emission. Hence, joint observations from different instruments and frequency ranges let us to complete full representation of the evolution of so...