South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range

Detalhes bibliográficos
Autor(a) principal: Luz, David
Data de Publicação: 2010
Outros Autores: Berry, David L., Peralta, Javier, Drossart, Pierre, Piccioni, Giuseppe
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/6912
Resumo: We report on measurements of Venus cloud velocities from VIRTIS/Venus Express observations of the south polar region of Venus. Cloud tracking has been performed using a method of automated digital correlation. Tracking has been performed on pairs of monochromatic VIRTIS images selected mainly in the 5 μm window, but also at 1.74, 2.3, 3.93 micrometers. Wind measurements from vector retrievals based on automated feature tracking show high variability, indicating the presence of important transient motions. The time-averaged zonal winds indicate different day and night side regimes. On the day side both the zonal wind component (u) and the meridional one (v) are approximately uniform between 84S and 76S, with u ∼ −40 m/s and v ∼ −10 m/s. On the night side the zonal wind decreases poleward, from a maximum at 76S. The meridional wind is smaller than on the day side and appears to change sign from poleward to equatorward at 76S. The cold collar boundary appears to be a transition region not only for the temperature, but for the winds as well. In this region wave motions are also apparent, with amplitudes on the order of 40 m/s for u′ and 10 m/s for v′.
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spelling South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal rangeVenusPlanetary atmospheresVenus ExpressVIRTISWe report on measurements of Venus cloud velocities from VIRTIS/Venus Express observations of the south polar region of Venus. Cloud tracking has been performed using a method of automated digital correlation. Tracking has been performed on pairs of monochromatic VIRTIS images selected mainly in the 5 μm window, but also at 1.74, 2.3, 3.93 micrometers. Wind measurements from vector retrievals based on automated feature tracking show high variability, indicating the presence of important transient motions. The time-averaged zonal winds indicate different day and night side regimes. On the day side both the zonal wind component (u) and the meridional one (v) are approximately uniform between 84S and 76S, with u ∼ −40 m/s and v ∼ −10 m/s. On the night side the zonal wind decreases poleward, from a maximum at 76S. The meridional wind is smaller than on the day side and appears to change sign from poleward to equatorward at 76S. The cold collar boundary appears to be a transition region not only for the temperature, but for the winds as well. In this region wave motions are also apparent, with amplitudes on the order of 40 m/s for u′ and 10 m/s for v′.Geophysical Research Abstracts2012-12-21T12:29:05Z2012-12-212010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/6912http://hdl.handle.net/10174/6912engLuz, D., Berry, D.L., Peralta, J., Drossart, P., Piccioni G. and the Venus Express Team. South Polar Dynamics of the Venusian Atmosphere from VIRTIS/Venus Express Mapping in the Thermal Range. Geophysical Research Abstracts Vol. 12, EGU2010-11119, 2010 EGU General Assembly 2010.http://meetingorganizer.copernicus.org/EGU2010/EGU2010-11119.pdfsimnaonaonddberry@uevora.ptndndnd343Luz, DavidBerry, David L.Peralta, JavierDrossart, PierrePiccioni, Giuseppeinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:46:37Zoai:dspace.uevora.pt:10174/6912Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:01:33.609107Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
title South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
spellingShingle South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
Luz, David
Venus
Planetary atmospheres
Venus Express
VIRTIS
title_short South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
title_full South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
title_fullStr South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
title_full_unstemmed South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
title_sort South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
author Luz, David
author_facet Luz, David
Berry, David L.
Peralta, Javier
Drossart, Pierre
Piccioni, Giuseppe
author_role author
author2 Berry, David L.
Peralta, Javier
Drossart, Pierre
Piccioni, Giuseppe
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Luz, David
Berry, David L.
Peralta, Javier
Drossart, Pierre
Piccioni, Giuseppe
dc.subject.por.fl_str_mv Venus
Planetary atmospheres
Venus Express
VIRTIS
topic Venus
Planetary atmospheres
Venus Express
VIRTIS
description We report on measurements of Venus cloud velocities from VIRTIS/Venus Express observations of the south polar region of Venus. Cloud tracking has been performed using a method of automated digital correlation. Tracking has been performed on pairs of monochromatic VIRTIS images selected mainly in the 5 μm window, but also at 1.74, 2.3, 3.93 micrometers. Wind measurements from vector retrievals based on automated feature tracking show high variability, indicating the presence of important transient motions. The time-averaged zonal winds indicate different day and night side regimes. On the day side both the zonal wind component (u) and the meridional one (v) are approximately uniform between 84S and 76S, with u ∼ −40 m/s and v ∼ −10 m/s. On the night side the zonal wind decreases poleward, from a maximum at 76S. The meridional wind is smaller than on the day side and appears to change sign from poleward to equatorward at 76S. The cold collar boundary appears to be a transition region not only for the temperature, but for the winds as well. In this region wave motions are also apparent, with amplitudes on the order of 40 m/s for u′ and 10 m/s for v′.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01T00:00:00Z
2012-12-21T12:29:05Z
2012-12-21
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/6912
http://hdl.handle.net/10174/6912
url http://hdl.handle.net/10174/6912
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Luz, D., Berry, D.L., Peralta, J., Drossart, P., Piccioni G. and the Venus Express Team. South Polar Dynamics of the Venusian Atmosphere from VIRTIS/Venus Express Mapping in the Thermal Range. Geophysical Research Abstracts Vol. 12, EGU2010-11119, 2010 EGU General Assembly 2010.
http://meetingorganizer.copernicus.org/EGU2010/EGU2010-11119.pdf
sim
nao
nao
nd
dberry@uevora.pt
nd
nd
nd
343
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Geophysical Research Abstracts
publisher.none.fl_str_mv Geophysical Research Abstracts
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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