Convective storms in closed cyclones in Jupiter's South Temperate Belt: (I) observations

On May 31, 2020 a short-lived convective storm appeared in one of the small cyclones of Jupiter's South Temperate Belt (STB) at planetographic latitude 30.8S. The outbreak was captured by amateur astronomer Clyde Foster in methane-band images, became widely known as Clyde's Spot, and was imaged at very high resolution by the Junocam instrument on board the Juno mission 2.5 days later. Junocam images showed a white two-lobed cyclonic system with high clouds observed in the methane-band at 890 nm. The storm evolved over a few days to become a dark feature that showed turbulence for months, presented oscillations in its drift rate, and slowly expanded, first into a Folded Filamentary Region (FFR), and later into a turbulent segment of the STB over a timescale of one year. On August 7, 2021, a new storm strikingly similar to Clyde's Spot erupted in a cyclone of the STB. The new storm exhibited first a similar transformation into a turbulent dark feature, and later transformed into a dark cyclone fully formed by January 2022. We compare the evolution into a FFR of Clyde's Spot with the formation of a FFR observed by Voyager 2 in 1979 in the South South Temperate Belt (SSTB) after a convective outburst in a cyclone that also developed a two-lobed shape. We also discuss the contemporaneous evolution of an additional cyclone of the STB, which was similar to the one were Clyde's Spot developed. This cyclone did not exhibit visible internal convective activity, and transformed from pale white in 2019, with low contrast with the environment, to dark red in 2020, and thus, was very similar to the outcome of the second storm. This cyclone became bright again in 2021 after interacting with Oval BA. We present observations of these phenomena obtained by amateur astronomers, ground-based telescopes, Hubble Space Telescope and Junocam. This study reveals that short-lived small storms that are active for only a few days can produce complex longterm changes that extend over much larger areas than those initially covered by the storms. In a second paper [In tilde urrigarro et al., 2022] we use the EPIC numerical model to simulate these storms and study moist convection in closed cyclones.We are very thankful to the large community of amateur observers operating small telescopes that submit their Jupiter observations to databases such as PVOL and ALPO-Japan. We are also grateful to two anonymous reviewers for their comments that improved the clarity of this paper. This work has been supported by Grant PID2019-109467GB-I00 funded by MCIN/AEI/10.13039/501100011033/and by Grupos Gobierno Vasco IT1366-19. PI acknowledges a PhD scholarship from Gobierno Vasco. GSO and TM were supported by NASA with funds distributed to the Jet Propulsion Laboratory, California Institute of Technology under contract 80NM0018D0004. C. J. Hansen was sup-ported by funds from NASA, USA to the Juno mission via the Planetary Science Institute. IOE was supported by a contract funded by Europlanet 2024 RI to navigate Junocam images, now available as maps in PVOL at http://pvol2.ehu.eus. Europlanet 2024 RI has received funding from the European Unions Horizon 2020 research and innovation programme under grant agreement No 871149. G.S. Orton, S. R. Brueshaber, T. W. Momary, K. H. Baines and E. K. Dahl were visiting Astronomers at the Infrared Telescope Facility, which is operated by the University of Hawaii under contract 80HQTR19D0030 with the National Aeronautics and Space Administration. In addition, support from NASA Juno Participating Scientist award 80NSSC19K1265 was provided to M.H. Wong. This work has used data acquired from the NASA/ESA Hubble Space Telescope (HST) , which is operated by the Association of 807 Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These HST observations are associated with several HST observing programs: GO/DD 14661 (PI: M.H. Wong) , GO/DD 15665 (PI: I. de Pater) , GO/DD 15159 (PI: M. H. Wong) , GO/DD 15502 (PI: A. Simon) , GO/DD 14661 (PI: M. H. Wong) , GO/DD 16074 (PI: M.H. Wong) , GO/DD 16053 (PI: I. de Pater) , GO/DD 15929 (PI: A. Simon) , GO/DD 16269 (PI: A. Simon) . PlanetCam observations were collected at the Centro Astronomico Hispanico en Andalucia (CAHA) , operated jointly by the Instituto de Astrofisica de Andalucia (CSIC) and the Andalusian Universities (Junta de Andalucia) . This work was enabled by the location of the IRTF and Gemini North telescopes within the Mauakea Science Reserve, adjacent to the summit of Maunakea. We are grateful for the privilege of observing Kaawela (Jupiter) from a place that is unique in both its astronomical quality and its cultural signifi-cance. This research has made use of the USGS Integrated Software for Imagers and Spectrometers (ISIS) . Voyager 2 images were accessed through The PDS Ring-Moon Systems Nodes OPUS search service

Meteorological pressure at Gale crater from a comparison of REMS/MSL data and MCD modelling: Effect of dust storms

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The PVOL database in Europlanet 2024 RI

International audiencePVOL is an online database of amateur observations of solar system planets hosted by the University of the Basque Country at http://pvol2.ehu.es/ [1]. PVOL stands for Planetary Virtual Observatory and Laboratory and is one of the data services integrated in VESPA: a large collection of data services integrated in the Virtual European Solar and Planetary Access services using the same data access protocol (EPN-TAP) [2]. VESPA is an integral part of the Europlanet 2020 and 2024 Research Infrastructures and PVOL is one of its most used services. PVOL accumulates images provided by more than 300 amateur observers distributed through the globe and currently contains more than 47,000 image files. Most of the data correspond to image observations of Jupiter (67%) and Saturn (22%), but PVOL contains also useful data from Venus, Mars, Uranus and Neptune and some smaller collections of objects with no atmosphere (the Moon and Galilean satellites). In this contribution we document future plans for the service which will be carried out through 2021-2023 and we show the scientific potential of the data available in PVOL.Future plans for PVOL include frequent observation alerts, integration in the database of navigation files of the images from the popular WinJupos software (ims files), addition of amateur spectra of the giant planets, and a search engine and new data service of Jupiter maps obtained from the JunoCam instrument on the Juno mission that will also be integrated in PVOL/VESPA. This will allow to perform combined searches of data obtained close in time from amateurs (PVOL), HST (queries of HST images are also integrated in VESPA) and JunoCam (new service).The science potential of amateur data comes from the availability of long-term data (PVOL contains Jupiter data since 2000 and Mars and Venus data since 2016), frequent observations (several daily observations of each planet close to their oppositions capable to cover complete longitudes of each planet) and high-resolution images provided by key contributors, with some of them capable to resolve highly-contrasted features of 0.05-0.10 arcsec. We review recent trends in analysis of this data from an analysis of scientific publications partially or highly based on data obtained from PVOL. We show that amateur observations remain as a valuable resource for high-impact science on modern research on different planets (3-5).AcknowledgementsEuroplanet 2024 RI has received funding from the European Union"s Horizon 2020 research and innovation programme under grant agreement No 871149. We are very grateful to the ensemble of amateur astronomers sending their data to PVOL. We are in debt by the quality of many of these observations and the regular observations provided by many of them requiring long sleepless nights and even longer days of detailed image processing.References(1) Hueso et al., The Planetary Virtual Observatory and Laboratory (PVOL) and its integration into the Virtual European Solar and Planetary Access (VESPA). Planet. Space Science, 150, 22-35 (2018).(2) Erard et al., VESPA: A community-driven Virtual Observatory in Planetary Science. Planet. Space Science, 150, 65-85 (2018).(3) Sánchez-Lavega et al., The impact of a large object on Jupiter in 2009 July, Astrophysical Journal Letters, 715, L155 (2010).(4) Sánchez-Lavega et al., An extremely high altitude plume seen at Mars morning terminator. Nature, 518, 525-528 (2015).(5) Sánchez-Lavega et al., A complex storm system in Saturn"s north polar atmosphere in 2018, Nature Astronomy, 4, 180-187 (2020)

The PVOL database in Europlanet 2024 RI

International audiencePVOL is an online database of amateur observations of solar system planets hosted by the University of the Basque Country at http://pvol2.ehu.es/ [1]. PVOL stands for Planetary Virtual Observatory and Laboratory and is one of the data services integrated in VESPA: a large collection of data services integrated in the Virtual European Solar and Planetary Access services using the same data access protocol (EPN-TAP) [2]. VESPA is an integral part of the Europlanet 2020 and 2024 Research Infrastructures and PVOL is one of its most used services. PVOL accumulates images provided by more than 300 amateur observers distributed through the globe and currently contains more than 47,000 image files. Most of the data correspond to image observations of Jupiter (67%) and Saturn (22%), but PVOL contains also useful data from Venus, Mars, Uranus and Neptune and some smaller collections of objects with no atmosphere (the Moon and Galilean satellites). In this contribution we document future plans for the service which will be carried out through 2021-2023 and we show the scientific potential of the data available in PVOL.Future plans for PVOL include frequent observation alerts, integration in the database of navigation files of the images from the popular WinJupos software (ims files), addition of amateur spectra of the giant planets, and a search engine and new data service of Jupiter maps obtained from the JunoCam instrument on the Juno mission that will also be integrated in PVOL/VESPA. This will allow to perform combined searches of data obtained close in time from amateurs (PVOL), HST (queries of HST images are also integrated in VESPA) and JunoCam (new service).The science potential of amateur data comes from the availability of long-term data (PVOL contains Jupiter data since 2000 and Mars and Venus data since 2016), frequent observations (several daily observations of each planet close to their oppositions capable to cover complete longitudes of each planet) and high-resolution images provided by key contributors, with some of them capable to resolve highly-contrasted features of 0.05-0.10 arcsec. We review recent trends in analysis of this data from an analysis of scientific publications partially or highly based on data obtained from PVOL. We show that amateur observations remain as a valuable resource for high-impact science on modern research on different planets (3-5).AcknowledgementsEuroplanet 2024 RI has received funding from the European Union"s Horizon 2020 research and innovation programme under grant agreement No 871149. We are very grateful to the ensemble of amateur astronomers sending their data to PVOL. We are in debt by the quality of many of these observations and the regular observations provided by many of them requiring long sleepless nights and even longer days of detailed image processing.References(1) Hueso et al., The Planetary Virtual Observatory and Laboratory (PVOL) and its integration into the Virtual European Solar and Planetary Access (VESPA). Planet. Space Science, 150, 22-35 (2018).(2) Erard et al., VESPA: A community-driven Virtual Observatory in Planetary Science. Planet. Space Science, 150, 65-85 (2018).(3) Sánchez-Lavega et al., The impact of a large object on Jupiter in 2009 July, Astrophysical Journal Letters, 715, L155 (2010).(4) Sánchez-Lavega et al., An extremely high altitude plume seen at Mars morning terminator. Nature, 518, 525-528 (2015).(5) Sánchez-Lavega et al., A complex storm system in Saturn"s north polar atmosphere in 2018, Nature Astronomy, 4, 180-187 (2020)