This is an informal seminar series led by Profs. Nic Brummell and Pascale Garaud on the general topic of any geophysical and astrophysical fluid dynamics (GAFD). Seminars are held at 2:30pm Thurs in BE358. Please contact Nic or Pascale if you would like to attend or speak at the seminar. Format is very informal (lots of questions) and expected to be at a level that rookie graduate students can at least understand the first half of the talk. Graduate students are encouraged to take the seminar for 2 units credit under the catalogue number of AMS280C.

CURRENT SEMINAR SERIES

**** PLEASE NOTE NEW LOCATION: BE358 *****

**** PLEASE NOTE NEW TIME: 2:30 PM *****

Spring 2013

• 04/11: Ben Byington (AMS, UCSC): "Stoked Dynamos (update)"
• 04/18: ArXiv reconnaissance exercise!
• 04/25: Mike McCourt (Astro, Berkeley) "Thermal instability and gravity waves in galaxy clusters"
• 05/02: No seminar
• 05/09: Randy Laine (Astro, UCSC) "Ohmic dissipation and torque induced in close-in extrasolar planets by the stellar magnetic field. "
  
• 05/15: (note: non-obvious date WED 1:30pm) Ian Dobbs-Dixon: "Atmospheric Dynamics of Short-Period Planets"
• 05/21: (note: another non-obvious date TUES) Celine Guervilly (Leeds, UK): "Dynamo action in rapidly rotating Rayleigh Benard convection"
• 05/30:
• 06/06:
• ??/??: Ben Byington (AMS, UCSC): "Rising tubes (update)"

PAST HISTORY OF GAFD SEMINARS:

Winter 2013

• 1/17: Goeff Vasil (UC Berkeley) "Nonlinear wall modes in rotating convection".
• 1/24: Daniel Lecoanet (UC Berkeley): "Generating Internal Gravity Waves with Turbulent Convection"
• 1/31: Pascale Garaud (UCSC): "Resonant triad interactions in oscillatory double-diffusive convection"
• 2/7: Daniel Whitt (Stanford): "Near-inertial waves in strongly baroclinic currents"
• 2/14: David Hughes (Leeds): "Dynamo action in rotating sheared convection"
  
• 2/21: Erinna Chen (UC Santa Cruz): "Scalings laws for tidally-driven ocean flow"
• 2/28: Toby Wood (UC Santa Cruz): "The pseudo-incompressible equations and Hamilton's Principle"
• 3/7:  Toby Wood (UC Santa Cruz): "The pseudo-incompressible equations and Hamilton's Principle: Part II"
• 3/14: Ryan Moll (UC Santa Cruz)

Fall 2012

• 09/27: Ben Byington (AMS, UCSC) "Leaky magnetic structures and their differences from idealized flux tubes"
• 10/04: Kate Marvel (LLNL) "Geophysical limits to global wind power"
• 10/11: Chao-Chin Yang (Astro, UCSC) "Thermal-Instability-Driven Turbulent Mixing in Galactic Disks"
• 10/18: Jonathan Besserer (ES, UCSC) "Coupling heat transfer, tidal dissipation, and orbital evolution with CHEOPS-2D"
• 10/25: Anna Rosen (Astro, UCSC) "What Sets the Initial Rotation Rates of Massive Stars?"
• 11/01: Emilie Neveu (Ocean Sciences, UCSC) "Multigrid methods for variational data assimilation - Coarse grid step efficiency"
• 11/08: Benoit Noyelles (Naxys, University of Namur, Belgium) "Modeling the rotation of the natural satellites"
• 11/15: Katelyn White (AMS, UCSC) "Numerical Simulations of Boundary Driven Dynamos"
• 11/22: Thanksgiving holiday: no seminar
• 11/29: Rosie Oglethorpe (DAMTP, Cambridge, UK) "Spin down of magnetized stars"
• 12/06: Cancelled (AGU)

Spring 2012

• 4/19: What we learned at Los Alamos (Brummell, Brown, Garaud, Moll, Wood)
• 4/26: Zonal flow formation and convection structures in spherical quasigeostrophic models at low Prandtl number (Celine Guervilly)
• 5/3: Fingering convection in astrophysics (Justin Brown)
• 5/10: Constraining turbulent droplet growth using aircraft observations of stratocumulus. (Mikael Witte)
• 5/17: Gravity waves in double-diffusive convection (Ryan Moll) 
• 5/24: Numerical simulations of boundary driven dynamos (Katelyn White)
• 5/31: Numerical simulations of the solar tachocline (Luis Acevedo-Arreguin)

Winter 2012

• 1/19:  Grad student updates
• 1/26:  Chris Malone "Using Maestro to Study Low Mach Number Convection in X-ray Bursts"
• 2/02:  Matthias Gritschneder "Simulations on Triggered Star Formation - from the Pillars of Creation to the Formation of the Solar System"
• 2/09:  Mimi Dai "Some properties of solutions to liquid crystal system".   
  Abstract:  In this talk, I will present some work on liquid crystal systems. The existence of global weak solutions and regularity of solutions to the nematic liquid crystals with non-constant fluid density were established. We also established an
  long time behavior result for the regular solutions to the liquid crystal system with constant density, providing small initial condition.
• 2/16:  Discussion of Brown, Vasil & Zweibel "sound-proof" paper.  The preprint of the paper is here.
  
• 2/23:  Toby Wood "Double-diffusive convection: layers upon layers"
• 3/01:  No seminar this week due to March 1st protests.  Do something useful.
• 3/08:  Ben Byington "Stoked Dynamos: Part 1 - Stoked kinematically-derived nonlinear nondynamos"
• 3/15:  Vivien Parmentier "3D mixing in the atmosphere of Hot-Jupiters, application to TiO clouds"

Fall 2011

• 09/22:  Ben Byington -- "Lagrangian grid-codes and mixing in inertial confinement fusion".  A report of work that Ben did this summer during his internship at LANL.
• 09/29:  Celine Guervilly -- "Boundary-driven dynamos and the role of magnetic boundary conditions"
• 10/06:  Erinna Chen -- "Obliquity tides in the Solar System"
• 10/13:  Pascale Garaud -- "Semi-convection in the interior of giant planets"
• 10/17:  OpenLab "Art and Astrophysics" exhibition reception DARC Room 108 @6pm
• 10/20:  Douglas Gough -- "Does niaivety pay?  (On turning near a singularity)"
• 10/27: 
• 11/03:  SDO3 meeting at Stanford -- no GAFD seminar
• 11/10:  Christina Dwyer -- "Driving an ancient lunar dynamo via mechanically stirring the core"
• 11/17:  Luis Acevedo-Arreguin -- "Latest results from idealised models of the solar interior"
• 11/24:  THANKSGIVING -- NO SEMINAR
• 12/01:  Phillipe Cardin -- "Reflections of Alfven Waves"

Winter 2011

• 1/6: Celine Guervilly: "Numerical study of planetary dynamos generated by surface shear or internal heating"
• 1/13: Pascale Garaud & Adrienne Traxler: "What we learned at AAS"
• 1/20: Andrew Cumming: "Compositionally-driven convection in neutron stars"
• 1/27: Adrienne Traxler: "Layer formation in double-diffusive convection at low Prandtl number"
• 2/3: Toby Wood: "Modeling the solar tachocline"

• 2/10: GAFD cancelled; GAFD attendees are requested to attend the Physics Colloquium (same time, Thimann 1) instead.

• 2/17: Nic Brummell: "Essentially nonlinear dynamos" OR Ben Byington (TBA)
• 2/24: Don Korycanski: TBA
• 3/3: David Hughes, TBA
• 3/10: TBA

Fall 10 Schedule

• 09/30:  Toby Wood -- "The Sun's interior flows and magnetic field"
• 10/07:  Pascale Garaud -- "Tidally-forced nonlinear waves in binary stars"
• 10/14:  Luis Accevedo-Arregiun -- "Modeling the rotation of the Solar Radiative Zone"
• 10/21:  SOE Research Review Day: go see our students posters at the E2 Lanai.
• 10/28:  Mimi Dai -- "The norm inflation for incompressible magneto-hydrodynamics system in Besov space $\dot{B}_\infty^{-1,\infty}$"
• 11/04:  Shawn Wolfe -- "NASA’s Virtual Observatories for Heliophysics"
• 11/11: VETERAN'S DAY: SCHOOL CLOSED = NO SEMINAR
• 11/18:  Fulai Guo & Bill Mathews (double header!) -- "The Astrophysics of AGN Feedback in Galaxy Clusters"
• 11/25:  THANKSGIVING DAY : NO SEMINAR
• 12/02:  Adrienne Traxler -- "Numerically determined transport laws for fingering convection in astrophysics"

Spring 10 Schedule

• 4/1:  for i=1,n, 2 do begin 04/(1+[i-1]*7): Steve Tobias, visiting professor, University of Leeds, UK:  "The State of Dynamo Theory: Part [i]"
• 4/8:  if n=2 then Physics seminar: Wick Haxton (Physics Department, UC Berkeley) "Solar Neutrinos, Metals, and the Planets" 4pm Thimann Lecture Hall 1
• 4/15: if n=3 then continue:  Steve Part II: The Return of Steve -- What is up with Mean Field Theory
• 4/22: if n=4 then Physics seminar: Joel Primack (UCSC) "A brief history of dark matter" 4pm Thimann Lecture Hall 1
• 4/29: if n=5 then continue:  Steve Part III: Even More Steve -- What you *can* learn from Mean Field Models
• 5/06: if n=6 then break; goto Nic Brummell "Dynamo efficiency in penetrative and non-penetrative compressible convection"
• 5/13: if n=7 then switch; Pascale Garaud "Closure models for astrophysical turbulence"
• 5/20: Cancelled
• 5/27: Paper discussion:  "Magnetic cycles in global large eddy simulations of convection"  Ghizaru, Charbonneau, Smolarkiewicz
• 6/03: Timour Radko

• Winter 10 Schedule

  • 01/14: Adrienne Traxler. " The final word on mean field theory of double-diffusion"
  • 01/21: Pascale Garaud. "Gyroscopic pumping and the Li dip"
  • 01/28: Nic Brummell. " Introduction to fast dynamos: Part I"
  • 02/02: Nic Brummell. " Introduction to fast dynamos: Part II"
  • 02/11: Cheryl Harrison. "Mixing in the California Coastal Current"
  • 02/18: Don Korycansky. "Thoughts on the GSF instability"
  • 02/25: Erinna Chen. "Tidal effects on Gallilean Satellites"
  • 03/4: Cancelled due to strike
  • 03/11: Nikolai Berkoff. "The limitations of the anelastic approximation"
   

Fall 09 Schedule

• • 09/24: Adrienne Traxler -- "2D stability of the Su-Gardner equation". Some work that Adrienne did over the summer at the Woods Hole GFD program on nonlinear waves -- tsunamis, solitons, shallow water nonlinear waves.
  • 10/01: Nic Brummell -- "The Solar Dynamo: Where are we?". A rookies introduction to the state-of-play in solar dynamo theory, with special emphasis on the current role of large numerical simulations.
  • 10/08: Erinna Chen -- "On the scattering of the internal tide due to topography". Erinna will tell us about the new work that she did at the Woods Hole GFD program over the last summer.
  • 10/15: Scott Noble -- "The GRMHD paradigm of black hole accretion". NOTE SPECIAL LOCATION -- ISB 102
  • 10/22: Luis Accevedo-Arreguin: Advancement to Candidacy practice talk
  • 10/29: Cancelled (go to Physics Colloquium on Dark Matter)
  • 11/5  : Pascale Garaud "The lithium dip problem"
  • 11/12: Gary Glatzmaier "Simulations of the VKS dynamo experiment"