%0 Journal Article
%3 abdu.pdf
%@mirrorrepository sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
%4 sid.inpe.br/mtc-m19@80/2010/07.30.17.52
%@issn 0273-1177
%A Abdu, Mangalathayil Ali,
%A Batista, I. S.,
%A Brum, C. G. M.,
%A MacDougal, J. W.,
%A Santos, A. M.,
%A Souza, J. R. de,
%A Sobra, J. H. A.,
%@secondarytype PRE PI
%B Advances in Space Research
%D 2010
%F self-archiving-INPE-MCTIC-GOV-BR
%@secondarykey INPE--PRE/
%K Equatorial ionosphere, meridional winds, Prereversal vertical drift, Equatorial electric fields, Solar flux dependence of Vz.
%@archivingpolicy denypublisher denyfinaldraft24
%N 8
%P 1078–1085
%@secondarymark B4_ASTRONOMIA_/_FÍSICA B3_CIÊNCIAS_BIOLÓGICAS_I B1_ENGENHARIAS_III B1_ENGENHARIAS_IV B1_GEOCIÊNCIAS B1_INTERDISCIPLINAR
%T Solar Flux Effects on the Equatorial Evening Vertical Drift and Meridional Winds over Brazil: A Comparison Between Observational Data and the IRI Model and the HWM Representations
%V 46
%X We present the results of a study of the equatorial evening F region prereversal vertical drift enhancement over Brazil as a function of solar flux (F10.7). The vertical drift is measured from true heights obtained from digisondes operated at an equatorial site, Sao Luis, and at an off equatorial site, Fortaleza. The different magnetic inclinations of the two sites causes different degree of dependence of the vertical drift on magnetic meridional winds permitting an evaluation of the solar flux control on both the evening vertical drift (zonal electric field) and meridional winds. The analysis period covers the year 2001 and 2004 during which the monthly mean F10.7 varied from 245 to 80. The solar flux dependence of the vertical drift and the evening F layer as obtained from the data are compared with the representation of such dependence in the IRI model. While the IRI description of such dependence appears comparable to that is determined from observational data there is significant difference between the drift values in the two cases, the IRI representation being an underestimation of the observed drift for all flux values. The results are discussed from the perspective of validating the IRI model representations of the vertical drift. The results of the study also shows that the HWM description of the evening meridional wind in the Brazilian sector, shows agreement with observation for lower F10.7 values, while it significantly deviates from the observed/calculated meridional wind for higher solar flux values.
%@area CEA
%@documentstage not transferred
%@group DAE-CEA-INPE-MCT-BR
%@group DAE-CEA-INPE-MCT-BR
%@group
%@group
%@group DAE-CEA-INPE-MCT-BR
%@group DAE-CEA-INPE-MCT-BR
%@group DAE-CEA-INPE-MCT-BR
%@dissemination WEBSCI; PORTALCAPES.
%@usergroup administrator
%@usergroup banon
%@usergroup marciana
%@nexthigherunit 8JMKD3MGPCW/3ETL868
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation National Astronomy and Ionosphere Center, Space and Atmospheric Science Department, Arecibo Observatory, Puerto Rico
%@affiliation Department of Physics and Astronomy, The University of Western Ontario, London, Ontario, Canada
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@versiontype publisher
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@doi 10.1016/j.asr.2010.06.009
%2 sid.inpe.br/mtc-m19@80/2010/07.30.17.52.44