Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations
Context. First identified in 2016 by the Japan Aerospace eXploration Agency (JAXA) Akatsuki mission, the discontinuity or disruption is a recurrent wave observed to propagate over decades at the deeper clouds of Venus (47-56 km above the surface), while its absence at the top of the clouds (∼70 km)...
| Autores: | , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/158837 |
| Acceso en línea: | https://hdl.handle.net/11441/158837 https://doi.org/10.1051/0004-6361/202244822 |
| Access Level: | acceso abierto |
| Palabra clave: | Methods: data analysis Planets and satellites: atmospheres Planets and satellites: terrestrial planets Waves |
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Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations Peralta Calvillo, Javier Cidadão, A. Morrone, L. Foster, C. Bullock, M. Young, E. F. Gárate López, I. Sánchez Lavega, A. Horinouchi, T. Imamura, T. Kardasis, E. Yamazaki, A. Watanabe, S. Methods: data analysis Planets and satellites: atmospheres Planets and satellites: terrestrial planets Waves Context. First identified in 2016 by the Japan Aerospace eXploration Agency (JAXA) Akatsuki mission, the discontinuity or disruption is a recurrent wave observed to propagate over decades at the deeper clouds of Venus (47-56 km above the surface), while its absence at the top of the clouds (∼70 km) suggests that it dissipates at the upper clouds and contributes to the maintenance of the puzzling atmospheric superrotation of Venus through wave-mean flow interaction. Aims. Taking advantage of the campaign of ground-based observations undertaken in coordination with the Akatsuki mission from December 2021 until July 2022, we undertook the longest uninterrupted monitoring of the cloud discontinuity to date to obtain a pioneering long-term characterisation of its main properties and to better constrain its recurrence and lifetime. Methods. The dayside upper, middle, and nightside lower clouds were studied with images acquired by the Akatsuki Ultraviolet Imager (UVI), amateur observers, and SpeX at the NASA Infrared Telescope Facility (IRTF). Hundreds of images were inspected in search of the discontinuity events and to measure key properties such as its dimensions, orientation, and rotation period. Results. We succeeded in tracking the discontinuity at the middle clouds during 109 days without interruption. The discontinuity exhibited properties nearly identical to measurements in 2016 and 2020, with an orientation of 91° ± 8, length of 4100 ± 800 km, width of 500 ± 100 km, and a rotation period of 5.11 ± 0.09 days. Ultraviolet images during 13-14 June 2022 suggest that the discontinuity may have manifested at the top of the clouds during ∼21 h as a result of an altitude change in the critical level for this wave, due to slower zonal winds. Junta de Andalucía EMERGIA20_00414 Ministerio de Ciencia e Innovación PID2019-109467GB-I00 Gobierno Vasco IT1742-22 Administración Nacional de Aeronáutica y el Espacio 80HQTR19D0030 EDP Sciences https://hdl.handle.net/11441/158837 https://doi.org/10.1051/0004-6361/202244822 |
| title |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations |
| spellingShingle |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations Peralta Calvillo, Javier Methods: data analysis Planets and satellites: atmospheres Planets and satellites: terrestrial planets Waves |
| title_short |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations |
| title_full |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations |
| title_fullStr |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations |
| title_full_unstemmed |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations |
| title_sort |
Venus Cloud Discontinuity in 2022: The first Long-term Study with Uninterrupted Observations |
| author |
Peralta Calvillo, Javier |
| author_facet |
Peralta Calvillo, Javier Cidadão, A. Morrone, L. Foster, C. Bullock, M. Young, E. F. Gárate López, I. Sánchez Lavega, A. Horinouchi, T. Imamura, T. Kardasis, E. Yamazaki, A. Watanabe, S. |
| author_role |
author |
| author2 |
Cidadão, A. Morrone, L. Foster, C. Bullock, M. Young, E. F. Gárate López, I. Sánchez Lavega, A. Horinouchi, T. Imamura, T. Kardasis, E. Yamazaki, A. Watanabe, S. |
| author2_role |
author author author author author author author author author author author author |
| topic |
Methods: data analysis Planets and satellites: atmospheres Planets and satellites: terrestrial planets Waves |
| topic_facet |
Methods: data analysis Planets and satellites: atmospheres Planets and satellites: terrestrial planets Waves |
| description |
Context. First identified in 2016 by the Japan Aerospace eXploration Agency (JAXA) Akatsuki mission, the discontinuity or disruption is a recurrent wave observed to propagate over decades at the deeper clouds of Venus (47-56 km above the surface), while its absence at the top of the clouds (∼70 km) suggests that it dissipates at the upper clouds and contributes to the maintenance of the puzzling atmospheric superrotation of Venus through wave-mean flow interaction. Aims. Taking advantage of the campaign of ground-based observations undertaken in coordination with the Akatsuki mission from December 2021 until July 2022, we undertook the longest uninterrupted monitoring of the cloud discontinuity to date to obtain a pioneering long-term characterisation of its main properties and to better constrain its recurrence and lifetime. Methods. The dayside upper, middle, and nightside lower clouds were studied with images acquired by the Akatsuki Ultraviolet Imager (UVI), amateur observers, and SpeX at the NASA Infrared Telescope Facility (IRTF). Hundreds of images were inspected in search of the discontinuity events and to measure key properties such as its dimensions, orientation, and rotation period. Results. We succeeded in tracking the discontinuity at the middle clouds during 109 days without interruption. The discontinuity exhibited properties nearly identical to measurements in 2016 and 2020, with an orientation of 91° ± 8, length of 4100 ± 800 km, width of 500 ± 100 km, and a rotation period of 5.11 ± 0.09 days. Ultraviolet images during 13-14 June 2022 suggest that the discontinuity may have manifested at the top of the clouds during ∼21 h as a result of an altitude change in the critical level for this wave, due to slower zonal winds. |
| publishDate |
2023 |
| format |
article |
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publishedVersion |
| url |
https://hdl.handle.net/11441/158837 https://doi.org/10.1051/0004-6361/202244822 |
| eu_rights_str_mv |
openAccess |
| publisher |
EDP Sciences |
| institution |
Universidad de Sevilla (US) |
| collection |
idUS. Depósito de Investigación de la Universidad de Sevilla |
| reponame_str |
idUS. Depósito de Investigación de la Universidad de Sevilla |
| instname_str |
Universidad de Sevilla (US) |
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1878436881479237632 |
| publishDateSort |
2023 |
| author_browse |
Bullock, M. Cidadão, A. Foster, C. Gárate López, I. Horinouchi, T. Imamura, T. Kardasis, E. Morrone, L. Peralta Calvillo, Javier Sánchez Lavega, A. Watanabe, S. Yamazaki, A. Young, E. F. |
| publisherStr |
EDP Sciences |
| score |
6,9303427 |