Mathematics – Probability
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa33a1128h&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA33A-1128
Mathematics
Probability
2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2481 Topside Ionosphere
Scientific paper
Plasma bubbles observed by the IPEI payload of the ROCSAT-1 satellite during the solar maximum years of 2000 and 2001 are used to study the statistical features under quiet geomagnetic conditions (Kp < 3). We examine the occurrence probability and morphology of the bubbles, which are found to depend on local time, season, and magnetic field configuration (longitude). During the solstices the longitudinal variations of bubble structures were fairly pronounced. In particular, during the northern hemisphere winter, the bubbles were mainly found in the South Atlantic Anomaly (SAA) longitude sector (300o-360^oE), where the geomagnetic declinations are mostly negative. Such longitudinal preference of bubble events can be explained if we consider the effects of the neutral-wind dynamo electric fields and the horizontal density gradients (zonal and meridional) on the growth rate of the generalized Rayleigh-Taylor instability.
Fu Changbo
Ho Melvyn
Yeh Henry
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