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Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia

The occurrence rate of the equatorial plasma bubble (EPB) with season, solar activity, and geomagnetic conditions are investigated using long-term data sets of Malaysia Real-Time Kinematics Network (MyRTKnet) from 2008 to 2013. The rate of TEC (total electron content) change index (ROTI) in 5 min wa...

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Main Authors: M. Buhari, Suhaila, Abdullah, Mardina, Yokoyama, Tatsuhiro, Otsuka, Yuichi, Nishioka, Michi, Bahari, Siti Aminah, Hasbi, Alina Marie, Tsugawa, Takuya
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Published: American Geophysical Union 2017
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Q Science
Online Access:http://eprints.utm.my/id/eprint/66468/
http://dx.doi.org/10.1002/2016JA023202
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spelling my.utm.664682017-10-03T08:30:49Z http://eprints.utm.my/id/eprint/66468/ Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia M. Buhari, Suhaila Abdullah, Mardina Yokoyama, Tatsuhiro Otsuka, Yuichi Nishioka, Michi Bahari, Siti Aminah Hasbi, Alina Marie Tsugawa, Takuya Q Science The occurrence rate of the equatorial plasma bubble (EPB) with season, solar activity, and geomagnetic conditions are investigated using long-term data sets of Malaysia Real-Time Kinematics Network (MyRTKnet) from 2008 to 2013. The rate of TEC (total electron content) change index (ROTI) in 5 min was derived from MyRTKnet data to detect the EPB with scale sizes around tens of kilometers. Then, the daily east-west cross sections of 2-D ROTI maps were used to examine the EPB features over 100°E–119°E longitudes. The EPBs tend to occur successively in one night along the observational coverage of MyRTKnet during equinoxes in high solar activity years. The perturbations in a form of wavelike structures along the observed longitudes might be responsible for the development of successive EPBs due to high growth rate of the Rayleigh-Taylor instability (RTI) process. On the contrary, the occurrence of successive EPBs is infrequent and the occurrence day of EPB remains active during equinoctial months in low solar activity years. The small growth rate of the RTI process during low solar activity years might require a strong seed perturbation to generate the EPB structure. The occurrence probability of the EPB was found to be similar during quiet and disturbed geomagnetic conditions. The results imply that the strong perturbations play an important role in the development of the EPB in low solar activity years. Nonetheless, the high growth rate of the RTI could cause the successive occurrence of the EPB in high solar activity years. American Geophysical Union 2017-01-02 Article PeerReviewed M. Buhari, Suhaila and Abdullah, Mardina and Yokoyama, Tatsuhiro and Otsuka, Yuichi and Nishioka, Michi and Bahari, Siti Aminah and Hasbi, Alina Marie and Tsugawa, Takuya (2017) Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia. Journal of Geophysical Research: Space Physics, 122 (2). pp. 2174-2184. ISSN 2169-9380 http://dx.doi.org/10.1002/2016JA023202 DOI:10.1002/2016JA023202
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science
spellingShingle Q Science
M. Buhari, Suhaila
Abdullah, Mardina
Yokoyama, Tatsuhiro
Otsuka, Yuichi
Nishioka, Michi
Bahari, Siti Aminah
Hasbi, Alina Marie
Tsugawa, Takuya
Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia
description The occurrence rate of the equatorial plasma bubble (EPB) with season, solar activity, and geomagnetic conditions are investigated using long-term data sets of Malaysia Real-Time Kinematics Network (MyRTKnet) from 2008 to 2013. The rate of TEC (total electron content) change index (ROTI) in 5 min was derived from MyRTKnet data to detect the EPB with scale sizes around tens of kilometers. Then, the daily east-west cross sections of 2-D ROTI maps were used to examine the EPB features over 100°E–119°E longitudes. The EPBs tend to occur successively in one night along the observational coverage of MyRTKnet during equinoxes in high solar activity years. The perturbations in a form of wavelike structures along the observed longitudes might be responsible for the development of successive EPBs due to high growth rate of the Rayleigh-Taylor instability (RTI) process. On the contrary, the occurrence of successive EPBs is infrequent and the occurrence day of EPB remains active during equinoctial months in low solar activity years. The small growth rate of the RTI process during low solar activity years might require a strong seed perturbation to generate the EPB structure. The occurrence probability of the EPB was found to be similar during quiet and disturbed geomagnetic conditions. The results imply that the strong perturbations play an important role in the development of the EPB in low solar activity years. Nonetheless, the high growth rate of the RTI could cause the successive occurrence of the EPB in high solar activity years.
format Article
author M. Buhari, Suhaila
Abdullah, Mardina
Yokoyama, Tatsuhiro
Otsuka, Yuichi
Nishioka, Michi
Bahari, Siti Aminah
Hasbi, Alina Marie
Tsugawa, Takuya
author_facet M. Buhari, Suhaila
Abdullah, Mardina
Yokoyama, Tatsuhiro
Otsuka, Yuichi
Nishioka, Michi
Bahari, Siti Aminah
Hasbi, Alina Marie
Tsugawa, Takuya
author_sort M. Buhari, Suhaila
title Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia
title_short Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia
title_full Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia
title_fullStr Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia
title_full_unstemmed Climatology of successive equatorial plasma bubbles observed by GPS roti over Malaysia
title_sort climatology of successive equatorial plasma bubbles observed by gps roti over malaysia
publisher American Geophysical Union
publishDate 2017
url http://eprints.utm.my/id/eprint/66468/
http://dx.doi.org/10.1002/2016JA023202
_version_ 1643655800713904128
score 13.211869

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