Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa23a1883y&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA23A-1883
Physics
[2400] Ionosphere, [2409] Ionosphere / Current Systems, [2411] Ionosphere / Electric Fields, [2415] Ionosphere / Equatorial Ionosphere
Scientific paper
A dense network of geomagnetic field observations along the 210-degree magnetic meridian during 2000-2002 enabled us to determine daily values of (1) the total current intensity of the equivalent Sq current system Jtotal in kilo-amperes and (2) the distance between the northern and southern foci of the equivalent Sq current system dNS in degrees. It is found that the daily range of the north-south component of the geomagnetic field at Davao (a dip-equatorial station in Philippines) can be well described in this simple form: (Jtotal+76.379)(-0.007dNS+0.8217). The results suggest that day-to-day variation of equatorial electrojet is largely controlled by the intensity and shape of the mid-latitude Sq current system and local effects are often of secondary importance (under 20%).
Abe Sumiyoshi
Ikeda Atsushi
Magdas/Cpmn Group
Uozumi Teiji
Yamazaki Yasuhiro
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