Dr Stephen Griffiths

Dr Stephen Griffiths

Responsibilities

  • Director of Postgraduate Research Studies
  • Programme Manager for MSc Atmosphere-Ocean Dynamics

Research interests

My research lies within the mathematical geosciences, and is mainly oriented towards the fluid dynamics of the Earth's atmosphere and ocean. My aims are to understand observed dynamical phenomena, either by numerical simulations or through mathematical analysis of simplified theoretical models. Particular interests are:

  • Instability theory: analytical and numerical modelling of linear and nonlinear instabilities in rotating, stratified shear flows; inertial instability; symmetric instability. 
  • Nonlinear waves: analytical and numerical modelling of coupled nonlinear wave equations.
  • Waves in the atmosphere and ocean: analytical and numerical modelling; internal waves; equatorial waves; convectively-coupled waves. 
  • Ocean tides: global numerical modelling; regional numerical modelling of internal tides; paleotides and climate; ice-tide interactions; self-gravitation and Earth loading.
  • Magnetohydrodynamics: instabilities, and shallow-water magnetohydrodynamics.
  • Martian dynamics: numerical modelling of subsurface temperature and ice.
  • Numerical methods: finite-difference schemes and boundary schemes for irregular domains.

I currently supervise several PhD students working in these areas:  

  • Najib Zakaria: Wave propagation in staggered-grid finite-difference models with boundaries.
  • Thomas Goodfellow: Layer formation in double-diffusive convection (co-supervised with David Hughes and Peter Jimack).
  • Sam Williams: Theoretical and numerical simulation of atmospheric downbursts (co-supervised with Alan Blyth and John Marsham). 
  • John Ashcroft: Understanding and predicting high impact tropical cyclones (co-supervised with Juliane Schwendike and Andrew Ross). 
  • Lucy Recchia: Dynamics of the Indian Monsoon (co-supervised with Doug Parker). 
  • Dan Rumgay: Instabilities in shallow-water magnetohydrodynamics (co-supervised with David Hughes). 
  • Megan Bickle: Interactions of environmental wind-shear and deep moist convection in the tropics (co-supervised with John Marsham and Andrew Ross). 
  • Joseph Elmes: Internal tide generation (co-supervised with Onno Bokhove). 
  • Alexander Kimbley: Equatorial instabilities in planetary atmospheres (co-supervised with David Hughes). 

Former PhD students are

  • Oliver Halliday: Atmospheric convection and gravity waves (co-supervised with Doug Parker). 
  • Sarah O’Mahony: Inertial instability in two-layer flows (co-supervised with Steve Tobias). 
  • Sam Hunter: Waves in shallow-water magnetohydrodynamics (co-supervised with David Hughes). 
  • Vijay Teeluck: Surface and internal tides over sea-floor topography (co-supervised with Chris Jones). 
  • Julian Mak: Shear instabilities in shallow-water magnetohydrodynamics (co-supervised with David Hughes). 

Qualifications

  • PhD (Cantab)
  • Certificate of Advanced Study in Mathematics (Part III Maths)
  • MA (Cantab)

Student education

I teach modules in applied mathematics, and supervise projects at level 2, level 3 and level 5 in computational mathematics and geophysical fluid dynamics. 

Research groups and institutes

  • Applied Mathematics
  • Astrophysical and Geophysical Fluid Dynamics
<h4>Postgraduate research opportunities</h4> <p>We welcome enquiries from motivated and qualified applicants from all around the world who are interested in PhD study. Our <a href="https://phd.leeds.ac.uk">research opportunities</a> allow you to search for projects and scholarships.</p>