On the effect of thermospheric neutral winds on post-midnight field-aligned irregularities at low latitudes

Tam Dao, Yuichi Otsuka, Kazuo Shiokawa, Michi Nishioka, Mamoru Yamamoto, Suhaila M. Buhari, Mardina Abdullah, Asnawi Husin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigated a post-midnight Field-Aligned Irregularities (FAIs) event observed with the Equatorial Atmosphere Radar (EAR) at Kototabang (0.2°S, 100.3°E, dip lat. 10.4°S) in Indonesia on the night of 9 July 2010, using a comprehensive dataset of both neutral and plasma parameters. We compared FAI echoes collocated with 630 nm airglow depletion detected by an all-sky imager. The thermospheric neutral winds and temperatures obtained by a Fabry-Perot interferometer at Kototabang and the altitudes of F-layer (h'F) observed with ionosondes at Kototabang, Chiang Mai, and Chumphon were also examined. We found that the 3-m scale post-midnight FAIs occurred within plasma bubbles. The convergence of the equatorward neutral winds happened in this particular event related to midnight temperature maximum (MTM) and that the equatorward winds in both northern and southern hemispheres could be responsible for the growth of plasma bubbles around midnight. The uplift of F-layer at low latitudes could increase the growth rate of the Rayleigh-Taylor instability. Eastward electric currents driven by the equatorward winds could also contribute to the generation of the irregularities at post-midnight.

Original languageEnglish
Title of host publication2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
Volume2017-January
ISBN (Electronic)9789082598704
DOIs
Publication statusPublished - 10 Nov 2017
Event32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 - Montreal, Canada
Duration: 19 Aug 201726 Aug 2017

Other

Other32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
CountryCanada
CityMontreal
Period19/8/1726/8/17

Fingerprint

irregularities
tropical regions
F region
plasma bubbles
Plasmas
equatorial atmosphere
Fabry-Perot interferometers
Indonesia
ionosondes
airglow
Taylor instability
Southern Hemisphere
Electric currents
Northern Hemisphere
electric current
Image sensors
night
radar
sky
echoes

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Instrumentation
  • Radiation

Cite this

Dao, T., Otsuka, Y., Shiokawa, K., Nishioka, M., Yamamoto, M., Buhari, S. M., ... Husin, A. (2017). On the effect of thermospheric neutral winds on post-midnight field-aligned irregularities at low latitudes. In 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 (Vol. 2017-January, pp. 1-4). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/URSIGASS.2017.8105106

On the effect of thermospheric neutral winds on post-midnight field-aligned irregularities at low latitudes. / Dao, Tam; Otsuka, Yuichi; Shiokawa, Kazuo; Nishioka, Michi; Yamamoto, Mamoru; Buhari, Suhaila M.; Abdullah, Mardina; Husin, Asnawi.

2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Vol. 2017-January Institute of Electrical and Electronics Engineers Inc., 2017. p. 1-4.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dao, T, Otsuka, Y, Shiokawa, K, Nishioka, M, Yamamoto, M, Buhari, SM, Abdullah, M & Husin, A 2017, On the effect of thermospheric neutral winds on post-midnight field-aligned irregularities at low latitudes. in 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. vol. 2017-January, Institute of Electrical and Electronics Engineers Inc., pp. 1-4, 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Montreal, Canada, 19/8/17. https://doi.org/10.23919/URSIGASS.2017.8105106
Dao T, Otsuka Y, Shiokawa K, Nishioka M, Yamamoto M, Buhari SM et al. On the effect of thermospheric neutral winds on post-midnight field-aligned irregularities at low latitudes. In 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Vol. 2017-January. Institute of Electrical and Electronics Engineers Inc. 2017. p. 1-4 https://doi.org/10.23919/URSIGASS.2017.8105106
Dao, Tam ; Otsuka, Yuichi ; Shiokawa, Kazuo ; Nishioka, Michi ; Yamamoto, Mamoru ; Buhari, Suhaila M. ; Abdullah, Mardina ; Husin, Asnawi. / On the effect of thermospheric neutral winds on post-midnight field-aligned irregularities at low latitudes. 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Vol. 2017-January Institute of Electrical and Electronics Engineers Inc., 2017. pp. 1-4
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