scholarly journals Effects of Electric Field and Neutral Wind on the Asymmetry of Equatorial Ionization Anomaly

Radio Science ◽  
2018 ◽  
Vol 53 (5) ◽  
pp. 683-697 ◽  
Author(s):  
Sovit M. Khadka ◽  
Cesar E. Valladares ◽  
Robert Sheehan ◽  
Andrew J. Gerrard
Keyword(s):  
Electric Field ◽  
Neutral Wind ◽  
Equatorial Ionization Anomaly ◽  
The Asymmetry

scholarly journals Super plasma fountain and equatorial ionization anomaly during penetration electric field

2009 ◽  
Vol 114 (A3) ◽  
pp. n/a-n/a ◽  
Author(s):  
N. Balan ◽  
K. Shiokawa ◽  
Y. Otsuka ◽  
S. Watanabe ◽  
G. J. Bailey
Keyword(s):  
Electric Field ◽  
Equatorial Ionization Anomaly

The asymmetry parameter of the electric field gradient in molecular crystals

1967 ◽  
Vol 7 (1) ◽  
pp. 103-106
Author(s):  
N. E. Ainbinder ◽  
V. S. Grechishkin ◽  
A. N. Osipenko
Keyword(s):  
Electric Field ◽  
Electric Field Gradient ◽  
Field Gradient ◽  
Asymmetry Parameter ◽  
Molecular Crystals ◽  
The Asymmetry

scholarly journals On the origin of pre-reversal enhancement of the zonal equatorial electric field

2009 ◽  
Vol 27 (5) ◽  
pp. 2053-2056 ◽  
Author(s):  
M. C. Kelley ◽  
R. R. Ilma ◽  
G. Crowley
Keyword(s):  
Electric Field ◽  
Equatorial Electrojet ◽  
Neutral Wind ◽  
Radio Observatory ◽  
Dominant Mechanism ◽  
Partial Closure ◽  
Incoherent Scatter ◽  
Unique Event ◽  
The Earth ◽  
Dusk Sector

Abstract. In November 2004, a large and variable interplanetary electric field (IEF) was felt in the reference frame of the Earth. This electric field penetrated to the magnetic equator and, when the Jicamarca Radio Observatory (JRO) was in the dusk sector, resulted in a reversal of the normal zonal component of the field. In turn, this caused a counter-electrojet (CEJ), a westward current rather than the usual eastward current. At the time of the normal pre-reversal enhancement (PRE) of the eastward field, the Jicamarca incoherent scatter radar (ISR) observed that the westward component became even more westward. Two of the three current explanations for the PRE depend on the neutral wind patterns. However, this unique event was such that the neutral wind-driven dynamos could not have changed. The implication is that the Haerendel-Eccles mechanism, which involves partial closure of the equatorial electrojet (EEJ) after sunset, must be the dominant mechanism for the PRE.

Global distribution of persistence of total electron content anomaly

2020 ◽  
Author(s):  
Yang-Yi Sun ◽  
Chieh-Hong Chen ◽  
Jann-Yenq Liu ◽  
Tsung-Yu Wu
Keyword(s):  
Electric Field ◽  
Total Electron Content ◽  
Electron Content ◽  
Neutral Wind ◽  
Large Area ◽  
Atmospheric Gravity Wave ◽  
Total Electron ◽  
Ionospheric Plasma Density ◽  
Gps Products ◽  
Ionospheric Electric Field

<p>Solar activities can disturb the ionosphere globally and induce ionospheric weather phenomena that transit rapidly through a large area. By contrast, sometimes the ionospheric plasma density can remain high or low over a certain location for a few days, which are difficult to be attributed to solar activities. This study shows the location preference of the positive and negative total electron content (TEC) anomalies persisting continuously longer than 24 hours (cross the two terminators) at middle and low latitudes (within ±60ºN geomagnetic latitudes). The TEC is obtained from the global ionospheric map (GIM) of the Center for Orbit Determination in Europe (CODE) (ftp://cddis.gsfc.nasa.gov/pub/gps/products/ionex) under the geomagnetic quiet condition of Kp ≤ 3o during the period of 2005–2018. There are a few (less than 4%) TEC anomalies that can persist over 24 hours. The persistence of the positive TEC anomaly along the ring of fire on the western edge of the Pacific Ocean. The high persistence of the TEC anomalies at midlatitudes suggests that thermospheric neutral wind contributes to the anomaly formation. The temporal and spatial anomalies of the ionospheric electric field, atmospheric electric field (flash), atmospheric gravity wave, and neutral wind over the ring of fire should be further examined for explaining whether the persistence of the TEC anomalies associates with lithospheric activities.</p>

Sign in / Sign up

Export Citation Format

Share Document