South-polar features on Venus similar to those near the north pole
Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright ‘dipole’ feature surrounded by a cold ‘collar’ at its north pole (1–4). The polar...
Published in: | Nature |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Online Access: | http://hdl.handle.net/11311/259688 https://doi.org/10.1038/nature06209 |
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ftpolimilanoiris:oai:re.public.polimi.it:11311/259688 2024-04-21T08:08:20+00:00 South-polar features on Venus similar to those near the north pole A. Adriani M. Blecka R. Carlson A. Coradini A. Di Lellis P. Drossart T. Encrenaz S. Erard S. Fonti V. Formisano T. Fouchet F. Angrilli R. Garcia D. Grassi R. Haus J. Helbert R. Hueso N. Ignatiev P. Irwin Y. Langevin S. Lebonnois M. Lopez Valverde G. Arnold D. Luiz L. Marinangeli M. Moriconi V. Orofino G. Piccioni A. Rodin M. Roos Serote SAGGIN, BORTOLINO A. Sanches Lavega D. Stam K. Baines F. Taylor D. Titov T. Virtis Venus Express G. Visconti C. Wilson M. Zambelli L. Zasova B. Be' Zard G. Bellucci J. Benkhoff J. Bibring A. Blanco A., Adriani M., Blecka R., Carlson A., Coradini A., Di Lelli P., Drossart T., Encrenaz S., Erard S., Fonti V., Formisano T., Fouchet F., Angrilli R., Garcia D., Grassi R., Hau J., Helbert R., Hueso N., Ignatiev P., Irwin Y., Langevin S., Lebonnoi M., Lopez Valverde G., Arnold D., Luiz L., Marinangeli M., Moriconi V., Orofino G., Piccioni A., Rodin M., Roos Serote Saggin, Bortolino A., Sanches Lavega D., Stam K., Baine F., Taylor D., Titov T., Virtis Venus Expre G., Visconti C., Wilson M., Zambelli L., Zasova B., Be' Zard G., Bellucci J., Benkhoff J., Bibring A., Blanco 2007 http://hdl.handle.net/11311/259688 https://doi.org/10.1038/nature06209 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000251209700035 volume:450 issue:7170 firstpage:637 lastpage:640 numberofpages:3 journal:NATURE http://hdl.handle.net/11311/259688 doi:10.1038/nature06209 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-36749055721 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/article 2007 ftpolimilanoiris https://doi.org/10.1038/nature06209 2024-03-25T16:49:38Z Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright ‘dipole’ feature surrounded by a cold ‘collar’ at its north pole (1–4). The polar dipole is a ‘double-eye’ feature at the centre of a vast vortex that rotates around the pole, and is possibly associated with rapid downwelling. The polar cold collar is a wide, shallow river of cold air that circulates around the polar vortex. One outstanding question has been whether the global circulation was symmetric, such that a dipole feature existed at the south pole. Here we report observations of Venus’ south-polar region, where we have seen clouds with morphology much like those around the north pole, but rotating somewhat faster than the northern dipole. The vortex may extend down to the lower cloud layers that lie at about 50km height and perhaps deeper. The spectroscopic properties of the clouds around the south pole are compatible with a sulphuric acid composition. Article in Journal/Newspaper North Pole South pole RE.PUBLIC@POLIMI - Research Publications at Politecnico di Milano Nature 450 7170 637 640 |
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Open Polar |
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RE.PUBLIC@POLIMI - Research Publications at Politecnico di Milano |
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ftpolimilanoiris |
language |
English |
description |
Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright ‘dipole’ feature surrounded by a cold ‘collar’ at its north pole (1–4). The polar dipole is a ‘double-eye’ feature at the centre of a vast vortex that rotates around the pole, and is possibly associated with rapid downwelling. The polar cold collar is a wide, shallow river of cold air that circulates around the polar vortex. One outstanding question has been whether the global circulation was symmetric, such that a dipole feature existed at the south pole. Here we report observations of Venus’ south-polar region, where we have seen clouds with morphology much like those around the north pole, but rotating somewhat faster than the northern dipole. The vortex may extend down to the lower cloud layers that lie at about 50km height and perhaps deeper. The spectroscopic properties of the clouds around the south pole are compatible with a sulphuric acid composition. |
author2 |
A., Adriani M., Blecka R., Carlson A., Coradini A., Di Lelli P., Drossart T., Encrenaz S., Erard S., Fonti V., Formisano T., Fouchet F., Angrilli R., Garcia D., Grassi R., Hau J., Helbert R., Hueso N., Ignatiev P., Irwin Y., Langevin S., Lebonnoi M., Lopez Valverde G., Arnold D., Luiz L., Marinangeli M., Moriconi V., Orofino G., Piccioni A., Rodin M., Roos Serote Saggin, Bortolino A., Sanches Lavega D., Stam K., Baine F., Taylor D., Titov T., Virtis Venus Expre G., Visconti C., Wilson M., Zambelli L., Zasova B., Be' Zard G., Bellucci J., Benkhoff J., Bibring A., Blanco |
format |
Article in Journal/Newspaper |
author |
A. Adriani M. Blecka R. Carlson A. Coradini A. Di Lellis P. Drossart T. Encrenaz S. Erard S. Fonti V. Formisano T. Fouchet F. Angrilli R. Garcia D. Grassi R. Haus J. Helbert R. Hueso N. Ignatiev P. Irwin Y. Langevin S. Lebonnois M. Lopez Valverde G. Arnold D. Luiz L. Marinangeli M. Moriconi V. Orofino G. Piccioni A. Rodin M. Roos Serote SAGGIN, BORTOLINO A. Sanches Lavega D. Stam K. Baines F. Taylor D. Titov T. Virtis Venus Express G. Visconti C. Wilson M. Zambelli L. Zasova B. Be' Zard G. Bellucci J. Benkhoff J. Bibring A. Blanco |
spellingShingle |
A. Adriani M. Blecka R. Carlson A. Coradini A. Di Lellis P. Drossart T. Encrenaz S. Erard S. Fonti V. Formisano T. Fouchet F. Angrilli R. Garcia D. Grassi R. Haus J. Helbert R. Hueso N. Ignatiev P. Irwin Y. Langevin S. Lebonnois M. Lopez Valverde G. Arnold D. Luiz L. Marinangeli M. Moriconi V. Orofino G. Piccioni A. Rodin M. Roos Serote SAGGIN, BORTOLINO A. Sanches Lavega D. Stam K. Baines F. Taylor D. Titov T. Virtis Venus Express G. Visconti C. Wilson M. Zambelli L. Zasova B. Be' Zard G. Bellucci J. Benkhoff J. Bibring A. Blanco South-polar features on Venus similar to those near the north pole |
author_facet |
A. Adriani M. Blecka R. Carlson A. Coradini A. Di Lellis P. Drossart T. Encrenaz S. Erard S. Fonti V. Formisano T. Fouchet F. Angrilli R. Garcia D. Grassi R. Haus J. Helbert R. Hueso N. Ignatiev P. Irwin Y. Langevin S. Lebonnois M. Lopez Valverde G. Arnold D. Luiz L. Marinangeli M. Moriconi V. Orofino G. Piccioni A. Rodin M. Roos Serote SAGGIN, BORTOLINO A. Sanches Lavega D. Stam K. Baines F. Taylor D. Titov T. Virtis Venus Express G. Visconti C. Wilson M. Zambelli L. Zasova B. Be' Zard G. Bellucci J. Benkhoff J. Bibring A. Blanco |
author_sort |
A. Adriani |
title |
South-polar features on Venus similar to those near the north pole |
title_short |
South-polar features on Venus similar to those near the north pole |
title_full |
South-polar features on Venus similar to those near the north pole |
title_fullStr |
South-polar features on Venus similar to those near the north pole |
title_full_unstemmed |
South-polar features on Venus similar to those near the north pole |
title_sort |
south-polar features on venus similar to those near the north pole |
publishDate |
2007 |
url |
http://hdl.handle.net/11311/259688 https://doi.org/10.1038/nature06209 |
genre |
North Pole South pole |
genre_facet |
North Pole South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000251209700035 volume:450 issue:7170 firstpage:637 lastpage:640 numberofpages:3 journal:NATURE http://hdl.handle.net/11311/259688 doi:10.1038/nature06209 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-36749055721 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1038/nature06209 |
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Nature |
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