Possible sources of long-term variations in the mid-latitude ionosphere

Autores
Elias, Ana Georgina
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Trends in the upper atmosphere, together with the global warming of the lower atmosphere, are part of the global change of the Earth system. In the present work, which is focused in the upper atmosphere, long-term variations of the critical frequency of the ionospheric F2 layer, foF2, are studied in terms of the following possible causes: (1) longterm variations of the solar EUV radiation shown by the solar cycle length (SCL), (2) long-term variations in geomagnetic activity measured by the aa index, (3) the increasing greenhouse gases concentration in the lower atmosphere which would be producing a temperature decrease in the upper atmosphere, and (4) the Earth’s main magnetic field secular variation, which implies changes in the dip angle (I) affecting the thermospheric neutral winds that move the conducting plasma of the ionosphere. For this purpose, foF2 time series of four mid-latitude stations were processed. After filtering the solar activity effect, the long-term variability of these time series and that of the mentioned possible trend sources, were analyzed. The study of trends in the upper atmosphere is an important contribution to one of the present focus of climate science that is the determination of the extent to which human activities are altering the planetary energy balance through the emission of greenhouse gases and pollutants.
Fil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Materia
IONOSPHERE
TRENDS
EARTH MAGNETIC FIELS
GLOBAL CHANGE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/77530

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spelling Possible sources of long-term variations in the mid-latitude ionosphereElias, Ana GeorginaIONOSPHERETRENDSEARTH MAGNETIC FIELSGLOBAL CHANGEhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Trends in the upper atmosphere, together with the global warming of the lower atmosphere, are part of the global change of the Earth system. In the present work, which is focused in the upper atmosphere, long-term variations of the critical frequency of the ionospheric F2 layer, foF2, are studied in terms of the following possible causes: (1) longterm variations of the solar EUV radiation shown by the solar cycle length (SCL), (2) long-term variations in geomagnetic activity measured by the aa index, (3) the increasing greenhouse gases concentration in the lower atmosphere which would be producing a temperature decrease in the upper atmosphere, and (4) the Earth’s main magnetic field secular variation, which implies changes in the dip angle (I) affecting the thermospheric neutral winds that move the conducting plasma of the ionosphere. For this purpose, foF2 time series of four mid-latitude stations were processed. After filtering the solar activity effect, the long-term variability of these time series and that of the mentioned possible trend sources, were analyzed. The study of trends in the upper atmosphere is an important contribution to one of the present focus of climate science that is the determination of the extent to which human activities are altering the planetary energy balance through the emission of greenhouse gases and pollutants.Fil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaBentham open2011-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/77530Elias, Ana Georgina; Possible sources of long-term variations in the mid-latitude ionosphere; Bentham open; The Open Atmospheric Science Journal; 5; 10-2011; 9-151874-2823CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://benthamopen.com/DOWNLOAD-PDF/TOASCJ-5-9/info:eu-repo/semantics/altIdentifier/doi/10.2174/1874282301105010009info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:21:31Zoai:ri.conicet.gov.ar:11336/77530instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:21:31.454CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Possible sources of long-term variations in the mid-latitude ionosphere
title Possible sources of long-term variations in the mid-latitude ionosphere
spellingShingle Possible sources of long-term variations in the mid-latitude ionosphere
Elias, Ana Georgina
IONOSPHERE
TRENDS
EARTH MAGNETIC FIELS
GLOBAL CHANGE
title_short Possible sources of long-term variations in the mid-latitude ionosphere
title_full Possible sources of long-term variations in the mid-latitude ionosphere
title_fullStr Possible sources of long-term variations in the mid-latitude ionosphere
title_full_unstemmed Possible sources of long-term variations in the mid-latitude ionosphere
title_sort Possible sources of long-term variations in the mid-latitude ionosphere
dc.creator.none.fl_str_mv Elias, Ana Georgina
author Elias, Ana Georgina
author_facet Elias, Ana Georgina
author_role author
dc.subject.none.fl_str_mv IONOSPHERE
TRENDS
EARTH MAGNETIC FIELS
GLOBAL CHANGE
topic IONOSPHERE
TRENDS
EARTH MAGNETIC FIELS
GLOBAL CHANGE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Trends in the upper atmosphere, together with the global warming of the lower atmosphere, are part of the global change of the Earth system. In the present work, which is focused in the upper atmosphere, long-term variations of the critical frequency of the ionospheric F2 layer, foF2, are studied in terms of the following possible causes: (1) longterm variations of the solar EUV radiation shown by the solar cycle length (SCL), (2) long-term variations in geomagnetic activity measured by the aa index, (3) the increasing greenhouse gases concentration in the lower atmosphere which would be producing a temperature decrease in the upper atmosphere, and (4) the Earth’s main magnetic field secular variation, which implies changes in the dip angle (I) affecting the thermospheric neutral winds that move the conducting plasma of the ionosphere. For this purpose, foF2 time series of four mid-latitude stations were processed. After filtering the solar activity effect, the long-term variability of these time series and that of the mentioned possible trend sources, were analyzed. The study of trends in the upper atmosphere is an important contribution to one of the present focus of climate science that is the determination of the extent to which human activities are altering the planetary energy balance through the emission of greenhouse gases and pollutants.
Fil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
description Trends in the upper atmosphere, together with the global warming of the lower atmosphere, are part of the global change of the Earth system. In the present work, which is focused in the upper atmosphere, long-term variations of the critical frequency of the ionospheric F2 layer, foF2, are studied in terms of the following possible causes: (1) longterm variations of the solar EUV radiation shown by the solar cycle length (SCL), (2) long-term variations in geomagnetic activity measured by the aa index, (3) the increasing greenhouse gases concentration in the lower atmosphere which would be producing a temperature decrease in the upper atmosphere, and (4) the Earth’s main magnetic field secular variation, which implies changes in the dip angle (I) affecting the thermospheric neutral winds that move the conducting plasma of the ionosphere. For this purpose, foF2 time series of four mid-latitude stations were processed. After filtering the solar activity effect, the long-term variability of these time series and that of the mentioned possible trend sources, were analyzed. The study of trends in the upper atmosphere is an important contribution to one of the present focus of climate science that is the determination of the extent to which human activities are altering the planetary energy balance through the emission of greenhouse gases and pollutants.
publishDate 2011
dc.date.none.fl_str_mv 2011-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/77530
Elias, Ana Georgina; Possible sources of long-term variations in the mid-latitude ionosphere; Bentham open; The Open Atmospheric Science Journal; 5; 10-2011; 9-15
1874-2823
CONICET Digital
CONICET
url http://hdl.handle.net/11336/77530
identifier_str_mv Elias, Ana Georgina; Possible sources of long-term variations in the mid-latitude ionosphere; Bentham open; The Open Atmospheric Science Journal; 5; 10-2011; 9-15
1874-2823
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://benthamopen.com/DOWNLOAD-PDF/TOASCJ-5-9/
info:eu-repo/semantics/altIdentifier/doi/10.2174/1874282301105010009
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Bentham open
publisher.none.fl_str_mv Bentham open
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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