Depth of a strong jovian jet from a planetary-scale disturbance driven by storms

Sánchez‐Lavega, A.; Orton, Glenn S.; Hueso, R.; García-Melendo, E.; Pérez‐Hoyos, S.; Simon-Miller, A. A.; Rojas, J. F.; Gómez, José María; Yanamandra-Fisher, P.; Fletcher, Leigh N.; Joels, J.; Kemerer, J.; Hora, J. L.; Karkoschka, Erich; Pater, Imke de; Wong, M. H.; Marcus, Philip; Pinilla-Alonso, N.; Carvalho, Filipe; Go, Christopher; Parker, David; Salway, M.; Valimberti, M.; Wesley, A.; Pujic, Z.

doi:10.1038/nature06533

Cited by 90 publications

(90 citation statements)

References 20 publications

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“…10 and 11). This is the latitude of the NTB, where the fastest jet stream lies and where planetaryscale convective disturbances (NTBD) developed with some recurrence (Sánchez-Lavega et al 1990;García-Melendo et al 2005), the last one having occurred in 2007 (Sánchez- Lavega et al 2008;Barrado-Izagirre et al 2009a). …”

Section: Long-term Variationsmentioning

confidence: 99%

“…Relevant questions about the observed wind system, which is measured at the 0.5−1 bar altitude level tracking the motions of small-cloud features, are: how deep it extends (shallow or deep relative to the planetary radius) (Dowling & Ingersoll 1989;Dowling 1995;Ingersoll et al 2004;Vasavada & Showman 2005;Sánchez-Lavega et al 2008), if winds are variable or not (García-Melendo & Sánchez-Lavega 2001;Asay-Davis et al 2011;Simon-Miller et al 2007;Simon-Miller & Gierasch 2010), and if the zonal jets support cyclic variations as has been claimed ). The study of long-or short-term global wind variations is fundamental to these questions and to A&A 554, A74 (2013) determine which is the energy source behind the atmospheric circulation (solar or internal or both).…”

Section: Introductionmentioning

confidence: 99%

“…Although some of the bands' morphology changes in periods of years (Peek 1958;Chapman & Reese 1968;Reese 1972;Minton 1972a,b;Smith & Hunt 1976;Sánchez-Lavega & Rodrigo 1985;Rogers 1995;Sánchez-Lavega & Gómez 1996;Sánchez-Lavega et al 1996;Fletcher et al 2011;Pérez-Hoyos et al 2012), the wind profile maintains a remarkable temporal stability. Furthermore, this zonal wind profile is not strongly affected by the dynamic perturbations at cloud level, such as those developed by convective storms like the South Equatorial Belt Disturbance (SEBD; Sánchez-Lavega et al 1996;Sánchez-Lavega & Gómez 1996) and the North Temperate Belt Disturbance (NTBD) (García-Melendo et al 2005Sánchez-Lavega et al 2008;Barrado-Izagirre et al 2009a). Even large impacts on the planet such as those of 1994 and 2009 (Hammel et al 1995(Hammel et al , 2010Sánchez-Lavega et al 1998, which released energies at the impact's locations of 10 22 and 10 20 joules, respectively, were not able to alter the winds at the latitudes of the impacts.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies using these kinds of images , 2011aBarrado-Izagirre et al 2009a;Sánchez-Lavega et al 2008, 2011Pérez-Hoyos et al 2012) inferred wind velocities by manual tracking of long-lived cloud details, which had been tracked over many different images or image pairs separated by several planetary rotations. We show that an automatic cloud correlation technique such as those used to analyze higher resolution HST or spacecraft data also works for ground-based observations with small telescopes obtained by keen amateur observers.…”

Section: Introductionmentioning

confidence: 99%

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Jupiter’s zonal winds and their variability studied with small-size telescopes

Barrado-Izagirre

Rojas

Hueso

et al. 2013

A&A

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Context. The general circulation of Jupiter's atmosphere at cloud level is dominated by a system of zonal jets that alternate in direction with latitude. The winds, measured in high-resolution images obtained by different space missions and the Hubble Space Telescope, are overall stable in their latitude location with small changes in intensity at particular jets. However, the atmosphere experiences repetitive changes in the albedo of particular belts and zones that are subject to large-scale intense disturbances that may locally influence the profile. Aims. The lack of high-resolution images has not allowed the wind system to be studied with the regularity required to assess its stability with respect to these major changes or to other types of variations (e.g., seasonality). To amend that, we present a study of the zonal wind profile of Jupiter using images acquired around the 2011 opposition by a network of observers operating small-size telescopes with apertures in the range 0.20−1 m. Methods. Using an automatic correlation technique, we demonstrate the capability to extract the mean zonal winds in observing periods close to the opposition. A broad collaboration with skilled amateur astronomers opens the possibility to regularly study shortand long-term changes in the jets of Jupiter. Results. We compare the 2011 Jovian wind profile to those previously obtained. The winds did not experience significant short-term changes over 2011 but show noteworthy variations at particular latitudes when compared with wind profiles from previous years. Most of these variations are related to major changes in the cloud morphology of the planet, in particular at 7 • N where an intense eastward jet varies around 40 ms −1 in its intensity according to the development or not of the "dark projection" features, confirming previous results.

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Section: Long-term Variationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Jupiter’s zonal winds and their variability studied with small-size telescopes

Barrado-Izagirre

Rojas

Hueso

et al. 2013

A&A

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“…Muitos foram os campos das contribuições de astrônomos amadores, tais como descobertas de novos cometas, estrelas novas e supernovas, estudo e descoberta de asteroides, monitoramento de estrelas variáveis, registro de manchas solares, impactos lunares ou o estudo sistemático de atmosferas planetárias, apenas para citar alguns exemplos, pois esta abrangência não é o objetivo deste texto (Dyson, 1992;Phillips, 2008;Romero, 2007;Trevisan, 2004;Sánchez-Lavega, 2007).…”

Section: Associações De Astronomia Amadoraunclassified

Ensino de ciências e matemática, I : temas sobre a formação de professores

Nardi¹,

Alves²,

Carvalho³

et al. 2009

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ROBERTO NARDImática; 5) Linguagem, discurso e ensino de Ciências; 6) Ciência, tecnologia, ambiente e desenvolvimento humano.Este livro apresenta, no conjunto de seus capítulos, uma parte das recentes produções do Programa, já aprovadas em bancas examinadoras, tendo como pano de fundo a questão da formação de professores.No primeiro capítulo, intitulado "Investigação temática na formação de professores de Física e no ensino de Física", os autores apresentam e discutem uma análise do processo e das estratégias de codifi cação e decodifi cação que adotam na investigação temática para a obtenção de redes conceituais prévias em Física. Diante dos dados obtidos, buscam a reconstrução racional da história da própria prática e constatam a relevância da investigação temática para inserção da problematização das implicações da relação Ciên-cia, Tecnologia, Sociedade e Ambiente (CTSA).No capítulo que segue, os autores de "As atividades de campo no ensino de Ciências: refl exões a partir das perspectivas de um grupo de professores" discutem sobre o papel das atividades de campo como estratégia no ensino das Ciências, mais especifi camente na Educação Ambiental, em investigação que fi zeram com um grupo de professores em uma atividade de campo promovida pelo Centro de Divulgação Científi ca e Cultural da Universidade de São Paulo (CDCC/USP)."Formação inicial de professores de Química: formação específi ca e pedagógica" é o título do próximo capítulo, no qual os autores abordam a formação pedagógica e específi ca de licenciandos em Química com base em dados e refl exões referentes a um estudo realizado, por meio do qual foi possível identifi car problemas em relação à formação inicial dos professores.Embasados por teorias sociomorais, os autores de "Ensino de Ciências e Educação Moral: implicações mútuas" argumentam em prol das possibilidades de subsídios mútuos entre o ensino de Ciências e a Educação Moral. Defendem no texto que o ensino de Ciências crítico e desmistifi cado potencializa o desenvolvimento moral, assim como os princípios teóricos do desenvolvimento também são subsídios para o ensino de Ciências na perspectiva da desmistifi cação da visão de ciência e construção crítica do conhecimento.Em "Um estudo exploratório sobre o ensino de Astronomia na formação continuada de professores", relata-se um estudo sobre a formação continuada de professores da Educação Básica, que visou o desenvolvimento profi ssional quanto à prática de ensino de conteúdos relacionados à Astronomia. ENSINO DE CIÊNCIAS E MATEMÁTICA I 9 No capítulo seguinte, intitulado "Análise de práticas pedagógicas realizadas em atividades de formação continuada de professores: a aproximação da História e Filosofi a da Ciência no ensino de Física", os autores uti li zam-se de um curso que realizam para analisar o desenvolvimento de atividades de formação continuada com docentes de Física, buscando-se aproximar a História e Filosofi a da Ciência do ensino.Ensino de Física para alunos com defi ciência visual é o tema do artigo "Inclusão no ensino de Físi...

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Colors of Jupiter's large anticyclones and the interaction of a Tropical Red Oval with the Great Red Spot in 2008

et al. 2013

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[1] The nature and mechanisms producing the chromophore agents that provide color to the upper clouds and hazes of the atmospheres of the giant planets are largely unknown. In recent times, the changes in red coloration that have occurred in large-and medium-scale Jovian anticyclones have been particularly interesting. In late June and early July 2008, a particularly color intense tropical red oval interacted with the Great Red Spot (GRS) leading to the destruction of the tropical red oval and cloud dispersion. We present a detailed study of the tropical vortices, usually white but sometimes red, and a characterization of their color spectral signatures and dynamics. From the spectral reflectivity in methane bands we study their vertical cloud structure compared to that of the GRS and BA. Using two spectral indices we found a near correlation between anticyclones cloud top altitudes and red color. We present detailed observations of the interaction of the red oval with the GRS and model simulations of the phenomena that allow us to constrain the relative vertical extent of the vortices. We conclude that the vertical cloud structure, vertical extent, and dynamics of Jovian anticyclones are not the causes of their coloration. We propose that the red chromophore forms when background material (a compound or particles) is entrained by the vortex, transforming into red once inside the vortex due to internal conditions, exposure to ultraviolet radiation, or to the mixing of two chemical compounds that react inside the vortex, confined by a potential vorticity ring barrier.Citation: Sa´nchez-Lavega, A., et al. (2013), Colors of Jupiter's large anticyclones and the interaction of a Tropical Red

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Depth of a strong jovian jet from a planetary-scale disturbance driven by storms

Cited by 90 publications

References 20 publications

Jupiter’s zonal winds and their variability studied with small-size telescopes

Jupiter’s zonal winds and their variability studied with small-size telescopes

Ensino de ciências e matemática, I : temas sobre a formação de professores

Colors of Jupiter's large anticyclones and the interaction of a Tropical Red Oval with the Great Red Spot in 2008

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