EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Liu & Berkey 1994
Liu, J.Y. and Berkey, F.T. (1994). Phase relationships between total electron content variations, Doppler velocity oscillations and geomagnetic pulsations. Journal of Geophysical Research 99: doi: 10.1029/94JA00869. issn: 0148-0227.

The phase relationship between variations of ionospheric total electron content (TEC) and ground-level ULF geomagnetic pulsations has been examined for the advection and compression mechanisms. To determine the causal mechanism, several earlier studies have examined the phase difference between oscillations of Doppler velocity in ionospherically reflected radio waves and simultaneous ULF geomagnetic pulsations. In most instances it was found that the phase relation varied from event to event. With the application of Euler's formula this study shows that in low geomagnetic and midgeomagnetic latitudes the phase differences between variations of TEC and ULF pulsations in the northward component of the geomagnetic field due to the advection and compression mechanisms are 0¿ and 180¿, respectively. We also found that TEC variations tend to lead ionospheric Doppler velocity oscillations by 90¿. Furthermore, it is shown that the phase relationship between ionospheric Doppler velocity oscillations and ULF pulsations of the northward component of the geomagnetic field, caused by the advection and compression mechanisms, are functions of the scale length, frequency of ULF waves, and geomagnetic dip. ¿ American Geophysical Union 1994

BACKGROUND DATA FILES

Abstract

Keywords
Ionosphere, Ionosphere-magnetosphere interactions, Ionosphere, Wave propagation, Ionosphere, Modeling and forecasting, Ionosphere, General or miscellaneous
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit