Airglow observations over the equatorial ionization anomaly zone in Taiwan

NCUIR > College of Earth Sciences > Graduate Institute of Space Science > journal & Dissertation > Item 987654321/50425

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50425

Title:	Airglow observations over the equatorial ionization anomaly zone in Taiwan
Authors:	Liu,JY;Rajesh,PK;Lee,IT;Chow,TC
Contributors:	太空科學研究所
Keywords:	TRAVELING IONOSPHERIC DISTURBANCES;RAYLEIGH-TAYLOR INSTABILITY;630 NM AIRGLOW;SPREAD-F;PLASMA DEPLETIONS;IMAGING OBSERVATIONS;SEASONAL-VARIATIONS;RADAR OBSERVATIONS;BUBBLES;HALEAKALA
Date:	2011
Issue Date:	2012-03-27 17:31:34 (UTC+8)
Publisher:	國立中央大學
Abstract:	Airglow imaging at mid-latitude stations often show intensity modulations associated with medium scale travelling ionospheric disturbances (MSTID), while those carried out near the equatorial regions reveal depletions caused by equatorial plasma bubbles (EPB). Two all sky cameras are used to observe plasma depletions in the 630.0 nm emission over the equatorial ionization anomaly (EIA) region, Taiwan (23 degrees N, 121 degrees E; 13.5 degrees N Magnetic) during 1998-2002 and 2006-2007. The results show EPB and MSTID depletions in different solar activity conditions. Several new features of the EPB depletions such as bifurcation, secondary structure on the walls, westward tilt, etc., are discussed in this paper. Evidence of tilted depletions with secondary structures developing on the eastern wall that later evolve to appear as bifurcations, are presented for the first time. Moreover, detail investigations are carried out using International Reference Ionosphere (IRI) model as well as the electron density from Ionosonde and Global Positioning System (GPS) Occultation Experiment (GOX) onboard FORMOSAT-3/COSMIC satellite, to understand the conditions that favor the propagation of MSTID to the latitude of Taiwan.
Relation:	ANNALES GEOPHYSICAE
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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