Medium-scale traveling ionospheric disturbances triggered by Super Typhoon Nepartak (2016)

被引：56

作者：

Chou, Min-Yang ^{[1
]}

Lin, Charles C. H. ^{[1
]}

Yue, Jia ^{[2
,3
]}

Chang, Loren C. ^{[4
]}

Tsai, Ho-Fang ^{[1
]}

Chen, Chia-Hung ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Earth Sci, Tainan, Taiwan

[2] Hampton Univ, Atmospher & Planetary Sci, Hampton, VA 23668 USA

[3] Univ Maryland, ESSIC, College Pk, MD 20742 USA

[4] Natl Cent Univ, Inst Space Sci, Taoyuan, Taiwan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 15期

关键词：

MIDLATITUDE F-REGION; GRAVITY-WAVES; SPREAD F; INSTABILITY; AIRS;

D O I：

10.1002/2017GL073961

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Two remarkable typhoon-induced traveling ionospheric disturbances (TIDs) with concentric and northwest-southeast (NW-SE) alignments, respectively, associated with concentric gravity waves (CGWs) and ionosphere instabilities possibly seeded by CGWs, were observed in total electron content (TEC) derived from ground-based Global Navigation Satellite System networks in Taiwan and Japan when the Category 5 Super Typhoon Nepartak approached Taiwan on 7 July 2016. The concentric TIDs (CTIDs) first appear with horizontal phase velocities of similar to 161-200 m/s, horizontal wavelengths of similar to 160-270 km, and periods of similar to 15-22 min during 08:00-11:20 UT. Following the CTIDs, the NW-SE aligned nighttime medium-scale TIDs (MSTIDs) are formed on the west edge of the CTIDs over the Taiwan Strait during 11:30-14:00 UT. It is suggested that the MSTIDs are produced by the electrodynamical coupling of Perkins instability and CGW-induced polarization electric fields. This study proposes connections of typhoon-induced CTIDs and subsequently occurring MSTIDs in the low-latitude ionosphere.

引用

页码：7569 / 7577

页数：9

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