High-latitude GPS TEC changes associated with a sudden magnetospheric compression

被引：14

作者：

Jayachandran, P. T. ^{[1
]}

Watson, C. ^{[1
]}

Rae, I. J. ^{[2
]}

MacDougall, J. W. ^{[3
]}

Danskin, D. W. ^{[4
]}

Chadwick, R. ^{[1
]}

Kelly, T. D. ^{[1
]}

Prikryl, P. ^{[5
]}

Meziane, K. ^{[1
]}

Shiokawa, K. ^{[6
]}

机构：

[1] Univ New Brunswick, Dept Phys, Fredericton, NB E3B 5A3, Canada

[2] Univ Alberta, Dept Phys & Astron, Edmonton, AB T6G 2G7, Canada

[3] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 5B9, Canada

[4] Nat Resources Canada, Geomagnet Lab, Ottawa, ON K1A 0Y3, Canada

[5] Commun Res Ctr, Ottawa, ON K2H 8S2, Canada

[6] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2011年 / 38卷

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

TRAVELING CONVECTION VORTICES; SOLAR-WIND;

D O I：

10.1029/2011GL050041

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Using ionospheric total electron content (TEC) measured by Global Positioning System (GPS) receivers of the Canadian High Arctic Ionospheric Network (CHAIN) we provide clear evidence for a systematic and propagating temporary TEC enhancement produced by compression of the magnetosphere due to a sudden increase in solar wind dynamic pressure. The magnetospheric compression is evident in THEMIS/GOES satellite data. Application of a GPS triangulation technique revealed that the TEC changes propagated with a speed of 3-6 km/s in the antisunward direction near noon and similar to 8 km/s in the sunward direction in the pre-noon lower latitude sector. Characteristics of these TEC changes along with riometer absorption measurements seems to indicate that the TEC change is due to electron density enhancement in the F region and is possibly due to particle precipitation associated with sudden magnetospheric compression. Citation: Jayachandran, P. T., C. Watson, I. J. Rae, J. W. MacDougall, D. W. Danskin, R. Chadwick, T. D. Kelly, P. Prikryl, K. Meziane, and K. Shiokawa (2011), Highlatitude GPS TEC changes associated with a sudden magnetospheric compression, Geophys. Res. Lett., 38, L23104, doi: 10.1029/2011GL050041.

引用

页数：7

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