@Article{SobralATTPZAB:2002:IoPlBu,
author = "Sobral, Jos{\'e} Humberto Andrade and Abdu, Mangalathayil Ali and
Takahashi, Hisao and Taylor, Michael J. and Paula, Eurico
Rodrigues de and Zamlutti, Carlos Jos{\'e} and Aquino, Maria
Goreti dos Santos and Borba, G. L.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and Utah State University, Logan, Ut,
USA and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and Universidade Federal
do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil",
title = "Ionospheric plasma bubble climatology over Brazil based on 22
years (1977-1998) of 630 nm airglow observations",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
year = "2002",
volume = "64",
number = "12-14",
pages = "1517--1524",
month = "Aug.-Sep.",
keywords = "aeronomia, ionospheric bubbles, ionospheric dynamics, F-region
dynamics, O1 6300 A nocturnal airglow, equatorial ionosphere,
thermospheric dynamics.",
abstract = "The frequency of occurrence of the large-scale ionospheric plasma
depletions, or plasma bubbles, over Cachoeira Paulista-CP (45°W,
33°S, 28°S dip), with solar activity, season, and geomagnetic
activity, during the period of 1977-1998, is studied here based on
934 days of scanning photometers and imagers data of the atomic
oxygen 630 nm nocturnal airglow. The bubble occurrence for the
entire period of study shows maximum rate of 86 percent in January
and 11 pecent in May. The seasonal pattern of the bubble
occurrence shows up as broad a maximum and a minimum centered
around summer and winter months, respectively. While during the
high-solar activity the maximum extends from September to April,
for the low-activity period it extends from October to March. The
average sunspot number for the solar maximum (minimum)for the data
of this work is 129.9 (33.1). Significant increase of bubble
occurrence (by similar to 80 percent ) from low to high solar
activity levels is found to occur in the present analysis only
during the equinoctial months of March-April and
September-October. The post-sunset plasma bubble occurrence over
Cachoeira Paulista is found to decrease with increase of K-p that
precedes the sunset by > 4 h, suggesting the role of disturbance
dynamo electric field to inhibit its development. Increase of K-p
during sunset hours can increase the bubble occurrence as a
possible effect of prompt penetration electric field. These
results are presented and discussed in this paper.",
issn = "1364-6826",
label = "10651",
language = "en",
targetfile = "1-s2.0-S1364682602000895-main.pdf",
urlaccessdate = "05 maio 2024"
}