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.
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页数：7
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