scholarly journals Ionospheric plasma bubbles observed concurrently by multi-instruments over low-latitude station Hainan

2015 ◽  
Vol 120 (3) ◽  
pp. 2288-2298 ◽  
Author(s):  
G. J. Wang ◽  
J. K. Shi ◽  
B. W. Reinisch ◽  
X. Wang ◽  
Z. Wang
Keyword(s):  
Ionospheric Plasma ◽  
Low Latitude ◽  
Plasma Bubbles ◽  
Latitude Station

scholarly journals Zonal velocity of the equatorial plasma bubbles over Kolhapur, India

2013 ◽  
Vol 31 (11) ◽  
pp. 2077-2084 ◽  
Author(s):  
D. P. Nade ◽  
A. K. Sharma ◽  
S. S. Nikte ◽  
P. T. Patil ◽  
R. N. Ghodpage ◽  
...  
Keyword(s):  
Ionospheric Plasma ◽  
Universal Time ◽  
Low Latitude ◽  
Plasma Bubbles ◽  
Standard Time ◽  
Latitude Station ◽  
Equatorial Plasma Bubbles ◽  
Evening Sector ◽  
Zonal Velocity ◽  
Good Agreement

Abstract. This paper presents the observations of zonal drift velocities of equatorial ionospheric plasma bubbles and their comparison with model values. These velocities are determined by nightglow OI 630.0 nm images. The nightglow observations have been carried out from the low latitude station Kolhapur (16.8° N, 74.2° E; 10.6° N dip lat.) during clear moonless nights. Herein we have presented the drift velocities of equatorial plasma bubbles for the period of February–April 2011. Out of 80 nights, 39 showed the occurrence of equatorial plasma bubbles (49%). These 39 nights correspond to magnetically quiet days (ΣKp < 26). The average eastward zonal velocities (112 ± 10 m s−1) of equatorial plasma bubbles increased from evening sector to 21:00 IST (Indian Standard Time = Universal Time + 05:30:00 h), reach maximum about 165 ± 30 m s−1 and then decreases with time. The calculated velocities are in good agreement with that of recently reported values obtained with models with occasional differences; possible mechanisms of which are discussed.

Variation in occurrence of equatorial plasma bubbles (EPBs) using All Sky Imager from low latitude station Kolhapur (16.8 °N, 74.2 °E, 10.6° dip. Lat.)

2017 ◽  
Vol 60 (11) ◽  
pp. 2452-2463 ◽  
Author(s):  
A.K. Sharma ◽  
O.B. Gurav ◽  
G.A. Chavan ◽  
H.P. Gaikwad ◽  
R.N. Ghodpage ◽  
...  
Keyword(s):  
Low Latitude ◽  
Plasma Bubbles ◽  
Latitude Station ◽  
Equatorial Plasma Bubbles ◽  
Sky Imager

scholarly journals The story of plumes: the development of a new conceptual framework for understanding magnetosphere and ionosphere coupling

2016 ◽  
Vol 34 (12) ◽  
pp. 1243-1253 ◽  
Author(s):  
Mark B. Moldwin ◽  
Shasha Zou ◽  
Tom Heine
Keyword(s):  
Conceptual Framework ◽  
Ionospheric Plasma ◽  
Short Review ◽  
Auroral Zone ◽  
Causal Chain ◽  
Elevated Plasma ◽  
Polar Cap ◽  
Paper Briefly ◽  
Low Latitude ◽  
F Region

Abstract. The name “plume” has been given to a variety of plasma structures in the Earth's magnetosphere and ionosphere. Some plumes (such as the plasmasphere plume) represent elevated plasma density, while other plumes (such as the equatorial F region plume) represent low-density regions. Despite these differences these structures are either directly related or connected in the causal chain of plasma redistribution throughout the system. This short review defines how plumes appear in different measurements in different regions and describes how plumes can be used to understand magnetosphere–ionosphere coupling. The story of the plume family helps describe the emerging conceptual framework of the flow of high-density–low-latitude ionospheric plasma into the magnetosphere and clearly shows that strong two-way coupling between ionospheric and magnetospheric dynamics occurs not only in the high-latitude auroral zone and polar cap but also through the plasmasphere. The paper briefly reviews, highlights and synthesizes previous studies that have contributed to this new understanding.

scholarly journals Mean Zonal Drift Velocities of Plasma Bubbles Estimated from Keograms of Nightglow All-Sky Images from the Brazilian Sector

2019 ◽  
Author(s):  
Fabio Vargas ◽  
Christiano Brum ◽  
Pedrina Terra ◽  
Delano Gobbi
Keyword(s):  
Standard Deviation ◽  
Drift Velocity ◽  
Velocity Estimation ◽  
Plasma Bubble ◽  
The West ◽  
Equatorial Station ◽  
Plasma Bubbles ◽  
Latitude Station ◽  
The Mean

We present in this work a method for estimation of plasma bubble mean zonal drift velocities using keograms generated from images of the OI 6300.0 nm nightglow emission collected from an equatorial station -- Cariri (7.4$^\circ$S, 36.5$^\circ$W), and a mid-latitude station -- Cachoeira Paulista (22.7$^\circ$S, 45$^\circ$W), both in the Brazilian sector. The mean zonal drift velocities were estimated for 239 events recorded from 2000 to 2003 in Cariri, and for 56 events recorded over Cachoeira Paulista from 1998 to 2000. It was found that plasma bubble zonal drift velocities are smaller ($\sim$60 ms$^{-1}$) for events occurring later in the night compared to those occurring earlier ($\sim$150 ms$^{-1}$). The decreasing rate of the zonal drift velocity is of $\sim$10 ms$^{-1}$/h. We have also found that, in general, bubble events appearing first in the west-most region of the keogram are faster than those appearing first in the east-most region of the keograms. Larger zonal drift velocities occur from 19 LT to 23 LT in a longitude range from 37$^\circ$ to 33$^\circ$. The method of velocity estimation using keograms compares favorably against the mosaic method developed by \cite{Arruda:2005}, but the standard deviation of the residuals for the zonal drift velocities from the two methods is $\sim$15 ms$^{-1}$

scholarly journals ASSOCIATION BETWEEN IONOSPHERIC PLASMA BUBBLES AND SPREAD-F

2005 ◽  
Author(s):  
H. Castilho ◽  
Vivian Moreira ◽  
José Humberto Andrade; Abdu ◽  
Mangalathayil Ali; Arruda ◽  
Daniela Cristina
Keyword(s):  
Ionospheric Plasma ◽  
Plasma Bubbles ◽  
Spread F
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