Observational evidence of interaction between Equatorial Plasma Bubble, Medium-scale Traveling Ionospheric Disturbances, and Midnight Brightness Wave at low latitudes

2020 ◽  
Author(s):  
Cosme Alexandre O. B. Figueiredo ◽  
Cristiano M. Wrasse ◽  
Hisao Takahashi ◽  
Yuichi Otsuka ◽  
Kazuo Shiokawa ◽  
...  
Keyword(s):  
Observational Evidence ◽  
Ionospheric Disturbances ◽  
Bubble Medium ◽  
Plasma Bubble ◽  
Brightness Wave ◽  
Medium Scale ◽  
Traveling Ionospheric Disturbances ◽  
Low Latitudes ◽  
Equatorial Plasma Bubble

scholarly journals Numerical modeling of the disappearance of equatorial plasma bubble by nighttime medium-scale traveling ionospheric disturbances

2021 ◽  
Author(s):  
Min-Yang Chou ◽  
Charles C. H. Lin ◽  
Joseph D. Huba
Keyword(s):  
Electric Fields ◽  
Induce Polarization ◽  
Underlying Mechanism ◽  
Naval Research ◽  
Ionospheric Disturbances ◽  
Plasma Bubble ◽  
Medium Scale ◽  
Traveling Ionospheric Disturbances ◽  
Ionosphere Model ◽  
Meridional Winds

Abstract The Naval Research Laboratory first-principles ionosphere model SAMI3/ESF is performed to study the interaction between the nighttime medium-scale traveling ionospheric disturbances (MSTIDs) and equatorial plasma bubbles (EPBs). The synthetic dynamo currents are imposed into the potential equation to induce polarization electric fields for generating the MSTIDs. Simulations demonstrate that the MSTIDs can inhibit the upward growth of EPBs; however, MSTIDs alone are insufficient to explain the disappearance of EPBs. We found that the meridional winds likely contribute to the disappearance of MSTIDs by reducing the background electron density and polarization electric fields within the EPBs. Then, the MSTIDs transport plasma to fill the EPB depletions up via E × B drifts. Both MSTIDs and meridional winds are necessary to comprehend the underlying mechanism of EPB disappearance. We also found that the zonal and vertical E × B drifts within the MSTIDs affect the morphology of EPBs, leading to a reverse-C shape structure.

scholarly journals Observational evidence of coupling between quasi-periodic echoes and medium scale traveling ionospheric disturbances

2007 ◽  
Vol 25 (10) ◽  
pp. 2185-2194 ◽  
Author(s):  
S. Saito ◽  
M. Yamamoto ◽  
H. Hashiguchi ◽  
A. Maegawa ◽  
A. Saito
Keyword(s):  
Observational Evidence ◽  
Ionospheric Disturbances ◽  
Gps Receiver ◽  
Interferometric Imaging ◽  
Geomagnetic Field Line ◽  
Medium Scale ◽  
Traveling Ionospheric Disturbances ◽  
F Region ◽  
Mu Radar ◽  
E Region

Abstract. We have found that quasi-periodic (QP) echoes in the E region were well defined when medium scale traveling ionospheric disturbances (MSTIDs) in the F region were present. The appearance and disappearance of the MSTIDs observed with the dense GPS receiver network are well correlated with the development and decay of QP echoes observed with the Middle-and-Upper atmosphere (MU) radar. Interferometric imaging of the QP echoes obtained using the MU radar shows that bands of echoing regions aligned northwest to southeast drift southwestward, and their wavefront and propagation direction are the same as those of MSTIDs. This result confirms the expectation of Hysell et al. (2002) who observed band structures in QP echoes by using the MU radar and suggested their relation to MSTIDs. We found observational evidence that the midlatitude E- and F regions are coupled through the geomagnetic field line, although we could not clearly ascertain which of the two regions is the source.

Sign in / Sign up

Export Citation Format

Share Document