BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Measuring and characterising inhomogeneous\, anisotropic turbulent
  cascades and jet formation from observations of Jupiter and Saturn - Pete
 r Read (University of Oxford)
DTSTART:20240521T090000Z
DTEND:20240521T100000Z
UID:TALK215719@talks.cam.ac.uk
DESCRIPTION:Peter Read + Arrate Antunano\, John Barbara\, Simon Cabanes\, 
 Greg Colyer\, Teresa del R&iacute\;o Gaztelurrutia\, Agustin Sanchez-Laveg
 a & Roland Young\nRecent analyses of wind measurements from tracking cloud
  motions in spacecraft images of Jupiter and Saturn indicate that scale to
  scale transfers of kinetic energy act from small to large scales over a w
 ide range of length scales\, much as anticipated for 2D or geostrophic tur
 bulence paradigms. At the smallest resolvable scales\, however\, there is 
 evidence of a forward (downscale) transfer\, at least at low and middle la
 titudes on Jupiter. Moreover\, the upscale transfers at the largest spatia
 l scales are evidently dominated by direct\, spectrally non-local eddy-zon
 al interactions\, in contrast to more classical scenarios\, associated wit
 h the generation of intense zonal jets\, alternating in latitude\, via the
  divergence or convergence of horizontal Reynolds stresses. Most analyses 
 to date have emphasised the global mean interactions for both planets\, th
 ereby focusing on the spatially homogeneous components of the turbulence. 
 But more recent observations indicate that the dynamics of these atmospher
 es varies significantly with latitude from the tropics to the polar region
 s. Here we present some new analyses of spectral energy transfers on both 
 Jupiter and Saturn that resolve variations in latitude. The (preliminary) 
 results indicate significant variability between different locations\, wit
 h a clear distinction between the tropics\, the extratropical middle latit
 udes and the polar regions. We discuss these in light of other observation
 s and models of gas giant circulation.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR