NOAO >   Observing Info >   Approved Programs >   2011B-0072

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Proposal Information for 2011B-0072


PI: Leigh Fletcher, University of Oxford, fletcher@atm.ox.ac.uk
Address: Atmospheric, Oceanic and Planetary Physics,, Clarendon Laboratory,, Parks Road,, Oxford,, OX1 3PU, United Kingdom

CoI: Glenn Orton, Jet Propulsion Laboratory
CoI: Michelle Edwards, Gemini Observatory - South
CoI: Patrick Irwin, University of Oxford
CoI: Agustin Sanchez-Lavega, Universidad del Pais Vasco
CoI: Nicholas Teanby, University of Bristol

Title: Jupiter's Global Dynamics a Decade after Cassini: Spectroscopic Mapping

Abstract: Visible observers have monitored a number of spectacular meteorological transformations in Jupiter's dynamic atmosphere in the decade (one jovian year) since Cassini acquired near-global thermal-IR spectroscopy. Some of those changes (Jupiter's reappearing South Equatorial Belt (SEB); interactions between the Great Red Spot (GRS) and other vortices) were spectrally mapped in the N-band by Gemini/TRECS during 2010B. However, the absence of near-simultaneous Q-band spectroscopy to determine Jupiter's temperature structure hampers the analysis of compositional variations in the N-band, and prevents an identification of the vertical motions and changes to atmospheric stability associated with these transitions. We propose classical-mode observations to obtain Q- and N-band spectral maps from pole to pole over three nights. Temperatures, cloud cover and the distributions of dynamical tracers (PH3, NH3 and C2H6) will be derived to study (a) large-scale climatic variations in temperatures, winds and atmospheric stability in the time since Cassini; (b) modifications to equatorial upwelling; (c) strengthening or dissipation of Jupiter's GRS; (d) asymmetries in chemistry and aerosols between the two poles; and (e) the long-term effects of the SEB revival that started in 2010B. We intend to obtain the first north-south map of Jupiter's temperatures and composition since Cassini in 2000.


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