%0 Journal Article
%T Plasma bubble zonal drift characteristics observed by airglow images over Brazilian tropical region
%A Paulino
%A Igo
%A Medeiros
%A Amauri Fragoso de
%A Buriti
%A Ricardo Arlen
%A Takahashi
%A Hisao
%A Sobral
%A Jos¨¦ Humberto Andrade
%A Gobbi
%A Delano
%J Revista Brasileira de Geof¨ªsica
%D 2011
%I Scientific Electronic Library Online
%R 10.1590/S0102-261X2011000200003
%X using airglow images observed at s£¿o jo£¿o do cariri (7.4os, 36.5ow; dip angle: -11os) from september 2000 to april 2007, plasma bubblezonal drifts for ninety-seven geomagnetically quiet nights (dst index higher than -30 nt) were calculated. the plasma bubble eastward averaged drifts presented an increase from 18:00 to 22:00 local time (lt), and followed by a deceleration. the plasma bubbles observed during high solar activity were faster after 22:00 lt. eastward drifts observed during the summer, after 21:00 lt, were higher than drifts observed during the equinox months. few nights had plasma bubble eastward drifts higher than 100 m/s and almost all bubbles disappeared after 02:00 lt. averaged zonal drifts observed between -9.5 and -5.5os were almost constant, primarily,around 23:00 lt.
%K plasma bubble
%K airglow
%K ionosphere.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0102-261X2011000200003&lng=en&nrm=iso&tlng=en