GSTDTAP  > 气候变化
DOI10.1029/2019GL082903
Daytime Evolution of Equatorial Plasma Bubbles Observed by the First Republic of China Satellite
Kil, Hyosub1; Paxton, Larry J.1; Lee, Woo Kyoung2,3; Jee, Geonhwa4
2019-05-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2019
卷号46期号:10页码:5021-5027
文章类型Article
语种英语
国家USA; South Korea
英文摘要

Plasma bubbles in the equatorial F region are thought of as nighttime phenomena because they develop at night and are assumed to vanish after sunrise. However, bubbles occasionally persist throughout the night and into the day. This study investigates the origin of daytime irregularities and their evolution using data from the first Republic of China satellite. Our results show that daytime irregularities occur in the longitudes where bubbles have developed on previous nights. A newly reported feature is the observation of the temporal variation of the locations of daytime irregularities; daytime irregularities are concentrated near the magnetic equator early in the morning, but the location gradually shifts to higher latitudes with time. This phenomenon is explained in terms of the latitudinal redistribution of fossil bubbles by the ionospheric fountain effect.


Plain Language Summary Severe electron density disturbances are created at night in the equatorial ionosphere by the upward transport of the low-density plasma from the bottomside of the ionosphere. These phenomena are called bubbles because the plasma density at the locations of the disturbances is smaller than that of the ambient plasma. Bubbles are thought of as nighttime phenomena because bubbles develop after sunset and decay away after sunrise. However, our study using satellite data shows that some parts of these nighttime bubbles survive through the day and become the major sources of daytime electron density irregularities. The new finding of our study is that the locations of daytime irregularities move from the magnetic equator to higher latitudes over time. The redistribution of fossil bubbles is driven by the same ionospheric electrodynamics that creates the ionospheric equatorial arcs.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000471237500002
WOS关键词F-LIKE IRREGULARITIES ; DENSITY IRREGULARITIES ; REGION ; DRIFTS ; IMAGES ; RADAR
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/183365
专题气候变化
作者单位1.Johns Hopkins Univ, Appl Phys Lab, Johns Hopkins Rd, Laurel, MD 20723 USA;
2.Korea Astron & Space Sci Inst, Daejeon, South Korea;
3.Univ Sci & Technol, Daejeon, South Korea;
4.Korea Polar Res Inst, Incheon, South Korea
推荐引用方式
GB/T 7714
Kil, Hyosub,Paxton, Larry J.,Lee, Woo Kyoung,et al. Daytime Evolution of Equatorial Plasma Bubbles Observed by the First Republic of China Satellite[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(10):5021-5027.
APA Kil, Hyosub,Paxton, Larry J.,Lee, Woo Kyoung,&Jee, Geonhwa.(2019).Daytime Evolution of Equatorial Plasma Bubbles Observed by the First Republic of China Satellite.GEOPHYSICAL RESEARCH LETTERS,46(10),5021-5027.
MLA Kil, Hyosub,et al."Daytime Evolution of Equatorial Plasma Bubbles Observed by the First Republic of China Satellite".GEOPHYSICAL RESEARCH LETTERS 46.10(2019):5021-5027.
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