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The QBO modulation of the occurrence of the counter electrojet
Author(s) -
Chen PeiRen,
Luo Yi,
Ma Jun
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl02796
Subject(s) - equatorial electrojet , electrojet , earth's magnetic field , quasi biennial oscillation , atmospheric sciences , stratosphere , amplitude , oscillation (cell signaling) , environmental science , geology , geophysics , physics , magnetic field , quantum mechanics , biology , genetics
Continuous hourly measurements of horizontal component of geomagnetic field obtained at Trivandrum, India, have been used to study the occurrence of the Counter Electrojet (CEJ). Because the data cover nearly three solar activity cycles, they can be used to investigate long‐term variations of the CEJ. After the data have been processed and detrented to reduce the influence of solar cycles and annual variations, they reveal a quasi‐biennial oscillation (QBO) of the occurrence of the CEJ. When compared with the QBO wind phase in the stratosphere, the occurrence of the CEJ is found to increase in east phase and to decrease in west one. This relationship suggests a possible mechanism for the production of the CEJ. Under certain conditions the interaction between the upward propagating planetary waves and the solar or lunar semidiurnal tides may cause the semidiurnal tides to be increased in amplitude and shifted in phase, which ultimately results in the occurrence of the CEJ.