Transport and Mixing
11th Nov 96 - 15th Nov 96
Introduction
A qualitative and quantitative description of transport and mixing is crucial to our understanding of the atmosphere and oceans. Many aspects remain poorly understood. New observational studies of both the atmosphere and the ocean now reveal the highly inhomogeneous structure of transport. The requirement to improve modelling of the atmosphere and the ocean now focusses our attention on the importance of details of stirring and mixing for many key processes, including the evolution of plankton populations in the ocean, the interactions between water vapour, radiation and dynamics in the troposphere, and the chemistry of ozone, both in the troposphere and the stratosphere.
Mathematical advances in dynamical systems theory, particularly chaotic mixing, and in the characterisation of complex geometrical structures offer the prospect of making progress in some of the above areas.
The goal of this workshop is to review the most recent advances in the field of transport and mixing, and to explore new avenues in the particular context of the Isaac Newton Institute's programme The Mathematics of the Atmosphere and Ocean Dynamics.
For additional information please contact Sylvie Gravel.
Programme
Abstracts of most of the seminars are available here.
MONDAY, NOVEMBER 11
- 9:30 -12:30
- Raymond T. Pierrehumbert (Department of Geophysical Sciences, University of Chicago, USA)
- Chaotic mixing in the atmosphere: what have we learned? What can we learn next?
- 14:00 - 15:00
- Kenneth P. Bowman (Department of Meteorology, Texas A & M University, USA)
- Observations and models of large-scale mixing in the atmosphere
- 15:30 - 16:30
- Audrey Rogerson (Woods Hole Oceanographic Institution, USA)
- Chaotic transport in a meandering jet
- 16:30 -
- Ice breaker
TUESDAY, NOVEMBER 12
- 9:30 -10:30
- Christopher Jones (Department of Applied Mathematics, Brown University, USA)
- Lagrangian transport in mesoscale ocean structures
- 11:00 - 12:00
- Noboru Nakamura (Dept. of Geophysical Sciences, University of Chicago, USA)
- Characterizing leaky containment vessels: a Lagrangian mean approach to the stratospheric transport
- 13:30 - 14:00
- Patrick Miller (Division of Applied Mathematics, Brown University, USA)
Quantifying transport in numerical simulations of oceanic flows
- 14:00 - 14:30
- Diego del-Castillo-Negrete (Scripps Institution of Oceanography, University of California, USA)
- Transport barriers and non-Gaussian statistics of passive tracers in quasigeostrophic flows
- 14:30 - 15:00
- Yanick Ricard (Laboratoire de Sciences de la Terre, ENS-Lyon, France)
- Mantle mixing
- 15:30 - 16:30
- Discussion
WEDNESDAY, NOVEMBER 15
- 9:30-10:00
- Warwick Norton (Department of Physics, University of Oxford, UK)
- Mixing of air masses in the stratosphere
- 10:00 - 10:30
- Bernard Legras (Laboratoire de Météorologie Dynamique, Ecole Normale Supérieure, France)
- Laminae in ozone soundings and reconstructed PV maps
- 11:00 - 11:30
- Peter H. Haynes (DAMTP, University of Cambridge, UK)
- Vertical-scale cascades and vertical mixing in the lower stratosphere
- 11:30 - 12:30
- Discussion
- 14:00 - 14:30
- Patrice Klein (Laboratoire de Physique des Océans, IFREMER, France)
- 3-D cascade of thermohaline anomalies by mesoscale turbulence
- 14:30 - 15:00
- Kelvin Richards (Southampton Oceanography Center, UK)
- Mixing by recirculating systems
- 15:30 - 16:00
- Bach Lien Hua (Laboratoire de Physique des Océans, IFREMER, France)
- Lagrangian accelerations in quasi-geostrophic turbulence
- 16:00 - 16:30
- Keith Ngan, Department of Physics (University of Toronto, Canada)
- Chaotic advection in a shallow-water model of the stratosphere
- 16:30 - 17:30
- Discussion
- Evening - DINNER
THURSDAY, NOVEMBER 14
- 9:30 - 10:30
- Stephen Wiggins (Department of Applied Mechanics, California Institute of Technology,
- USA)
- Lagrangian transport in flows with aperiodic time-dependence
- 11:00 - 11:30
- Robert S. MacKay (DAMTP, University of Cambridge, UK)
- Flux in systems with arbitrary time dependence
- 11:30 - 12:00
- Discussion
- 13:30 - 14:30
- Shigeo Yoden (Department of Geophysics, Kyoto University, Japan)
- Chaotoc mixing and transport processes related with some vortex motions in geophysical fluids
- 14:30 - 15:00
- Bernard Legras (Laboratoire de Météorologie Dynamique, Ecole Normale Supérieure, France)
- The effect of small-scale inhomogeneities on ozone depletion in the arctic
- 15:30 - 16:00
- Christos Vassilicos (DAMTP, University of Cambridge)
- Stirring and mixing by fractal interfaces
- 16:00 - 17:00
- Discussion
FRIDAY, NOVEMBER 15
9:30 - 11:30 Discussion R.T. Pierrehumbert, chairman