South polar dynamics of the Venusian atmosphere from VIRTIS/Venus Express mapping in the thermal range
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
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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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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1799136498893717504 |