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Evidence of the ionospheric response to the QBO
Author(s) -
Chen PeiRen
Publication year - 1992
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 - 10.1029/91gl01564
Subject(s) - geomagnetic storm , ionosphere , anomaly (physics) , earth's magnetic field , atmospheric sciences , variation (astronomy) , climatology , oscillation (cell signaling) , storm , environmental science , geology , meteorology , geophysics , physics , astrophysics , condensed matter physics , quantum mechanics , biology , magnetic field , genetics
The yearly intensity variation of the day‐to‐day variability of the equatorial ionization anomaly (EIA) has been investigated. It is revealed that this yearly intensity variation is weakly anticorrelated with the solar activity and geomagnetic aa indices but obviously modulated by the QBO (Quasi‐Biennial Oscillation): in the east phase of the QBO the day‐to‐day variability of the EIA increases; in the west phase of the QBO the day‐to‐day variability of the EIA decreases. These effects seem to imply that it is not the solar bursts and/or geomagnetic storms but other disturbances to which the day‐to‐day variability of the EIA is to be ascribed. A possible explanation for this phenomenon is proposed.