Observations of a large-scale gravity wave propagating over an extremely large horizontal distance in the thermosphere

被引：15

作者：

Guo, Jianpeng ^{[1
]}

Forbes, Jeffrey M. ^{[2
]}

Wei, Fengsi ^{[1
]}

Feng, Xueshang ^{[1
]}

Liu, Huixin ^{[3
]}

Wan, Weixing ^{[4
,5
]}

Yang, Zhiliang ^{[6
]}

Liu, Chaoxu ^{[1
]}

Emery, Barbara A. ^{[7
]}

Deng, Yue ^{[8
]}

机构：

[1] Chinese Acad Sci, NSSC, State Key Lab Space Weather, SIGMA Weather Grp, Beijing, Peoples R China

[2] Univ Colorado, Dept Aerosp Engn Sci, Boulder, CO 80309 USA

[3] Kyushu Univ, Fac Sci, Dept Earth & Planetary Sci, Fukuoka 812, Japan

[4] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Ionospher Environm, Beijing, Peoples R China

[5] Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China

[6] Beijing Normal Univ, Dept Astron, Beijing, Peoples R China

[7] Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA

[8] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 16期

基金：

中国国家自然科学基金;

关键词：

ATMOSPHERE; CHAMP; MODEL;

D O I：

10.1002/2015GL065671

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In this paper we report the detection of a large-scale gravity wave propagating over an extremely large horizontal distance in the thermosphere on 28 July 2006. Specifically, after being launched at the northern auroral region on the dayside, this wave propagated equatorward with phase speeds on the order of similar to 720 m/s and finally almost traveled around the Earth once horizontally in the thermosphere prior to dissipation. The time taken to dissipate is about 15.5 h. It is the farthest-traveling large-scale gravity wave currently tracked by satellite measurements, made possible by a sudden injection of energy in an unusually clean propagation environment. This experiment of opportunity serves as an important step in furthering our theoretical understanding of gravity wave propagation and dissipation in the thermosphere.

引用

页码：6560 / 6565

页数：6

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