ON THE FORMATION OF THE F1 LAYER DURING SUDDEN STRATOSPHERIC WARMING EVENTS
Journal Title: Solar-Terrestrial Physics - Year 2019, Vol 5, Issue 3
Abstract
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 December–January is shown to be more than twice lower than that in February at any level of magnetic activity. At moderate and low solar activity under quiet geomagnetic conditions, the appearance of F1 layer in midlatitudes of the Northern Hemisphere may be caused by active thermodynamic processes, which lead to transformation or destruction of the circumpolar vortex at heights of the middle atmosphere. Such global dynamic changes occurring in the winter strato-mesosphere are often associated with sudden stratospheric warming events, which are accompanied by increased generation of atmospheric waves of various scales. These wave disturbances can propagate upward to the heights of the lower thermosphere and ionosphere, carrying a significant vertical flow of energy and causing variations in the composition, thermodynamic parameters of the neutral atmosphere and ionosphere.
Authors and Affiliations
Polekh N. M. , Chernigovskaya M. A. , Yakovleva O. E.
Keywords
Related Articles
- EP ID EP702092
- DOI 10.12737/stp-53201914
- Views 111
- Downloads 0
COMPARING METHODS TO ESTIMATE CLOUD COVER OVER THE BAIKAL NATURAL TERRITORY IN DECEMBER 2020
The paper addresses the issue of how much cloud cover data obtained using satellite and model-interpolation techniques are suitable for monitoring the transparency of the atmosphere and determining conditions for airglow...
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...
MANIFESTATION OF SOLAR WIND COROTATING INTERACTION REGIONS IN GCR INTENSITY VARIATIONS
The regions of interaction between solar wind streams of different speed, known as corotating interaction regions, form an almost constantly existing structure of the inner heliosphere. Using observational data on the ma...
FORCE BALANCE IN CURRENT SHEETS IN COLLISIONLESS PLASMA
In this paper, we derive a divergent form of the force balance equation for collisionless plasma in the quasineutrality approximation, in which the electric field and current density are excluded. For a stationary spatia...
Statistical analysis of microflares as observed by the 4–8 GHz spectropolarimeter
Radio observations of weak events are one of the promising methods for studying energy release and non-thermal processes in the solar corona. The development of instrumental capabilities allows for radio observations of...