Recent Talks

2024

• An outflow equilibrium model for the solar corona, UK Space Weather and Space Environment Meeting II, Exeter, 10-Sep-2024.
• Latitude quenching nonlinearity in the solar dynamo, National Astronomy Meeting 2024, Hull, 19-Jul-2024.
• The photosphere and the polar fields, COFFIES Virtual Workshop: The science of the poles, 26-Jun-2024 (video)
• The Sun's non-potential corona over Solar Cycle 24, Dundee-Durham MHD Meeting, Durham, 14-May-2024.

2023

• Active regions from historical data, ISSI team meeting on rogue sunspots, 11-Jul-2023.
• Energy bounds from helicity for magnetic braids, Dundee-Durham MHD Research Workshop, Dundee, 22-May-2023.
• Coronal flux ropes over Solar Cycle 24 (a modelling perspective), SOLARNET Conference, Leibniz Institute for Astrophysics Potsdam, Germany, 8-May-2023.
• Conway's Army [click for slides], University Open Day, Durham, 21-Mar-2023.

2022

• Meaningful definitions of magnetic helicity in open domains, Applied Mathematics Seminar, St Andrews, 11-Nov-2022.
• Magneto-frictional modelling of the solar corona, SPATE seminar, Reading (Teams), 2-Nov-2022.
• SWEEP: Magnetic field boundaries and estimation of CME Bz, SWIMMR symposium, Met Office (Zoom), 8-Sep-2022.
• Meaningful definitions of magnetic helicity in open domains, Workshop on Topological Methods in Mathematical Physics, Ettore Majorana Centre, Erice, Italy, 6-Sep-2022. (video)
• Solar cycle evolution of magnetic flux ropes, COSPAR E2.1, Athens (remote), 18-Jul-2022.
• On the limitations of magneto-frictional relaxation, National Astronomy Meeting 2022, Warwick, 11-Jul-2021.
• Building a rogues gallery for Cycle 24, ISSI team meeting on rogue sunspots, 22-Jun-2022.
• Surface flux transport, ISSI Workshop on Solar and Stellar Dynamos: A New Era, Bern, Switzerland, 15-Jun-2022.
• On the limitations of magneto-frictional relaxation, Dundee-Durham MHD Research Day, Durham, 21-Apr-2022.

2021

• Magneto-frictional modelling of the solar corona, Workshop on Magnetohydrodynamics: Physics for the 21st Century, Lorentz Center, Leiden (Zoom), 14-Oct-2021.
• Advanced magnetic models for solar wind boundary conditions, SWIMMR symposium, Met Office (Zoom), 9-Sep-2021.
• How good is the bipolar approximation of active regions flux transport?, European Solar Physics Meeting 16, Turin (Zoom), 6-Sep-2021.
• Magnetohydrodynamics, STFC Introductory Course in Solar and Solar-Terrestrial Physics, Durham, 23-Aug-2021.
• Revisiting Taylor relaxation (poster), National Astronomy Meeting 2021, Bath (Zoom), 22-Jul-2021.
Revisiting Taylor relaxation, UKMHD 2021, Newcastle University (Zoom), 21-May-2021.
• Revisiting Taylor relaxation, British Applied Mathematics Colloquium, University of Glasgow (Zoom), 7-Apr-2021.
• Global magnetic field modelling of the solar corona, SOLARNET Winter School (Zoom), 25-Jan-2021 (website with video).
• How good is the bipolar approximation of active regions for surface flux transport?, COFFIES seminar, Stanford, USA (Zoom), 12-Jan-2021.

2020

• Does a potential magnetic field contain helicity?, HELICITY 2020 Online Advanced Study Programme, 8-Oct-2020.
• An HMI-SHARP bipole database, ISSI team meeting on rogue sunspots, Zoom, 29-Sep-2020.
• Where do solar eruptions come from?, UK Solar Online Seminar Series, 19-May-2020 (video).

2019

• Rogue sunspots [click for slides], Newcastle Astronomical Society, 21-Nov-19.
• New insights into magnetic relaxation from HPC, IDAS Launch event, Durham, 30-Sep-19.
• The DUMFRIC coronal model, Solar Orbiter MADAWG meeting, London, 11-Sep-19.
• Hemispheric injection of helicity by surface flux transport, ISSI team meeting on magnetic helicity, Bern, Switzerland, 21-Aug-19.
• Friction, flux ropes and field line helicity, IUGG 2019, Montreal, Quebec, Canada, 12-Jul-19.
• How many active regions are needed to predict the solar dipole moment?, Space Climate 7 Symposium, Canton Orford, Quebec, Canada, 10-Jul-19.
• Non-potentiality of the solar corona and why it matters, National Astronomy Meeting 2019, Lancaster, 4-Jul-19.
• Revisiting Taylor relaxation [poster], AAS/SPD Meeting, St Louis, USA, 12-Jun-19.
• Where do solar eruptions come from?, Karen Harvey Prize lecture, AAS/SPD Meeting, St Louis, USA, 12-Jun-19.
• Non-potentiality of the solar corona and why it matters, UK Solar Orbiter Workshop, London, 3-Jun-19.
• Rogue sunspots [click for slides], Saturday Morning Science, Durham, 27-Apr-19.
• Conway's army, University Open Day, Durham, 26-Mar-19 and 27-Mar-19.
• Magnetic helicity in the global solar corona, NORDITA scientific programme on Solar Helicities in Theory and Observations, Stockholm, Sweden, 7-Mar-19.
• Using prominence data for optimization, ISSI team meeting on reconstructing past magnetic activity, Bern, Switzerland, 13-Feb-19.

2018

• Defining field-line helicity, ISSI team meeting on magnetic helicity, Bern, Switzerland, 19-Dec-18.
• How important is polarity information?, ISSI team meeting on reconstructing past magnetic activity, Bern, Switzerland, 29-Aug-18.
• Magnetohydrodynamic relaxation theory [click for lecture notes], CISM Summer School, Udine, Italy, 11-Jun-18 to 15-Jun-18.
• Consequences of delayed flux emergence in coronal magnetic models, UKMHD Meeting, St Andrews, 28-Mar-18.
• Can we drive coronal evolution models from magnetic maps?, Astrophysics Seminar, Glasgow, 22-Mar-18.
• Conway's army [click for slides], University Open Day, Durham, 20-Mar-18 and 21-Mar-18.
• Can we drive coronal evolution models from magnetic maps?, Seminar, UCLAN, Preston, 14-Mar-18.
• Impact of magnetic topology on plasma dynamics, DAMTP Astrophysics Seminar, Cambridge, 26-Feb-18.
• Optimization of surface flux transport models/Meridional flow for historical solar cycles/The importance of active region magnetic structure, ISSI team meeting on reconstructing past magnetic activity, Bern, Switzerland, 11-Jan-18.

2017

• Friction, flux ropes and field line helicity, Into the red dragon's lair - workshop on space weather, Cardiff, 5-Dec-17.
• An inverse problem from solar physics, Applied Mathematics seminar, Durham, 1-Dec-17.
• Field line helicity as a tool for coronal physics, Helicity Thinkshop 3, Tokyo, 20-Nov-17.
• Reconstructing the coronal magnetic field: a model comparison, RAS Discussion Meeting on Solar Orbiter, London, 10-Nov-17.
• The impact of magnetic topology on plasma dynamics, MREP 2017 Meeting, Cambridge, 12-Sep-17.
• Friction, flux ropes and field line helicity: modelling CME initation, Bz Workshop, Arlington VA, USA, 2-Aug-17
• Friction, flux ropes and field line helicity: modelling CME initation, Naval Research Lab Seminar, Washington DC, USA, 31-Jul-17
• The global distribution of magnetic helicity in the solar corona, National Astronomy Meeting 2017, Hull, 6-Jul-17.
• Can we drive coronal evolution models from magnetic maps?, National Astronomy Meeting 2017, Hull, 4-Jul-17.
• The global distribution of magnetic helicity in the Sun's corona (poster), UKMHD 2017 meeting, Durham, 20-Apr-17.
• A quick introduction to parallel computing with MPI, Computing seminar, Durham, 15-Mar-17.

2016

• Incorporating flux emergence in global coronal simulations, RAS Specialist Discussion Meeting on Flux emergence, London, 14-Oct-16.
• The global distribution of magnetic helicity in the Sun's corona, Applied Mathematics Seminar, Glasgow, 29-Sep-16.
• The global distribution of magnetic helicity in the Sun's corona, ISSI team meeting on Magnetic Helicity, Bern, Switzerland, 20-Sep-16.
• Photospheric driving of non-potential coronal magnetic field simulations, Bz workshop, Albuquerque, New Mexico, 18-Jul-16.
• Modelling of filament formation, SHINE Workshop, Santa Fe, New Mexico, 13-Jul-16.
• The global distribution of magnetic helicity in the Sun's corona (poster), SHINE Workshop, Santa Fe, New Mexico, 11-Jul-16.
• The global distribution of magnetic helicity in the Sun's corona, CFSA Seminar, Warwick, 6-Jun-16.
• The global distribution of magnetic helicity in the Sun's corona, UKMHD Meeting, Glasgow, 12-May-16.
• The global distribution of magnetic helicity in the Sun's corona, IUTAM Symposium on Helicity Structures and Singularity in Fluid and Plasma Dynamics, Venice, Italy, 11-Apr-16.
• The global distribution of magnetic helicity in the Sun's corona, SPOCK Group Meeting, Durham, 17-Mar-16.
• Public lecture: Our variable magnetic Sun, Durham Astronomical Society, 26-Feb-16.
• Public lecture: Our variable magnetic Sun, Newcastle Astronomical Society, 18-Feb-16.
• Automated detection of magnetic flux ropes, RAS Specialist Discussion Meeting on Automated Data Analysis in Solar Physics, London, 8-Jan-16.

2015

• Data-driven modelling of the Sun's magnetic field, Mathematics Seminar, Dundee, 14-Sep-15.
• Impact of Magnetic Topology on Plasma Dynamics, XXXV European Dynamics Days, Exeter, 7-Sep-15.
• Global Magnetic Field modelling: how will Solar Orbiter help?, RAS National Astronomy Meeting 2015, Llandudno, 8-Jul-15.
• How do non-potential magnetic fields in the corona change solar wind predictions?, RAS National Astronomy Meeting 2015, Llandudno, 6-Jul-15.
• Impact of magnetic topology on plasma dynamics, Applied Maths Colloquium, University of Sheffield, 20-May-15.
• Public lecture: Our variable magnetic Sun, Bishop Auckland Astronomical Society, 7-May-15.
• The magnetic Borromean rings, SPOCK Group Meeting, Durham, 29-Apr-15.
• Photospheric driving of non-potential coronal magnetic field simulations, Bz Team Meeting, Boulder, Colorado, 13-Apr-15.
• Surface flux transport and the limits of solar cycle prediction, AFRL, Albuquerque, New Mexico, 9-Apr-15.
• Surface flux transport and the limits of solar cycle prediction, Solar physics seminar, Stanford University, California, 1-Apr-15.
• Surface flux transport and the limits of solar cycle prediction, Lockheed Martin Solar & Astrophysics Lab, California, 30-Mar-15.
• Surface flux transport and the limits of solar cycle prediction, Space Science seminar, University of Oulu, Finland, 25-Mar-15.
• Public lecture: Our variable magnetic Sun, Sunderland Astronomical Society, 15-Mar-15.
• Redistribution of magnetic helicity by reconnection, Applied Maths seminar, Newcastle University, 13-Feb-15.

2014

• Redistribution of magnetic helicity by reconnection, MHD seminar, University of Dundee, 27-Nov-14.
• Redistribution of magnetic helicity by reconnection, Mathematics seminar, Northumbria University, 12-Nov-14.
• Coronal dynamics and the Sun's magnetic memory, Solar Physics seminar, Royal Observatory of Belgium, Brussels, 30-Oct-14.
• Photospheric driving of non-potential coronal magnetic field simulations, Bz workshop, Arlington, Virginia, 21-Oct-14.
• Redistribution of magnetic helicity by reconnection, NASA Goddard Space Flight Center, Maryland, 20-Oct-14.
• Poster: Coronal magnetic braiding from photospheric observations, European Solar Physics Meeting, Dublin, 8-Sep-14 to 12-Sep-14.
• From the tachocline into the heliosphere: coupling a 3D kinematic dynamo to coronal models, Chris Jones 65th Meeting, Newcastle, 29-Aug-14.
• From the tachocline into the heliosphere: coupling a 3D kinematic dynamo to coronal models, COSPAR 40th Scientific Assembly, Moscow, 6-Aug-14.
• Local and global coronal magnetic field extrapolation, COSPAR 40th Scientific Assembly, Moscow, 3-Aug-14.
• Interpreting the helicity of open magnetic fields, Solar Physics seminar, Montana State University, 14-Jul-14.
• A three-dimensional kinematic dynamo model, UKMHD Meeting, Exeter, 22-May-14.
• The internal topology of magnetic flux tubes, Seminar, ICMAT, Madrid, 8-Apr-14.
• Quantifying reconnection in magnetic flux ropes, Workshop on Magnetic Flux Ropes, UCLA, California, 12-Feb-14.
• Coronal dynamics and the Sun's magnetic memory, SSL Colloquium, UC Berkeley, California, 7-Feb-14.

2013

• The internal topology of magnetic flux tubes, Maths Seminar, Dundee, 15-Oct-13.
• The internal topology of magnetic flux tubes, Maths Seminar, Exeter, 30-Sep-13.
• Update: Polar streams from the simulation viewpoint, 1-day workshop, Warwick, 4-Sep-13.
• Poster: On general magnetic reconnection, RAS National Astronomy Meeting 2013, St Andrews, 1-Jul-13 to 5-Jul-13.
• Filaments, chirality & magnetic hysteresis, RAS National Astronomy Meeting 2013, St Andrews, 4-Jul-13.
• Filaments, chirality & magnetic hysteresis, Astronomy Lunchtime Talk, Durham, 14-Jun-13.
• Full-cycle magnetofrictional simulations, Leverhulme Workshop: Probing the Sun Inside and Out, MSSL, Surrey, 20-May-13.
• Magnetic field topology, Geometry & Topology Seminar, Durham, 2-May-13.
• Predicting solar cycles, Cafe Scientifique, Durham, 20-Apr-13.

2012

• Coronal dynamics and the Sun's magnetic memory, seminar, MSSL, Surrey, 16-Nov-12.
• Unique topological characterisation of magnetic braids, Workshop on Tangled Magnetic Fields in Astro- & Plasma Physics, ICMS Edinburgh, Oct-12.
• Measuring 3D reconnection with a generalised flux function, 9th International Cambridge Workshop on Magnetic Reconnection, Copenhagen, Aug-12.
• Build up of coronal magnetic gradients from observed photospheric flows, Hinode-6 Meeting, St Andrews, Aug-12.
• Measuring 3D reconnection with a generalised flux function, NORDITA Astrophysics Seminar, Stockholm, Sweden, Aug-12.
• New topological constraints on magnetic relaxation, IUTAM Symposium: Extreme events in fluids, Dublin, Ireland, Jul-12.
• The flux transport model & its relevance to space weather & climate, NSO Workshop 26: Solar origins of space weather & space climate, Sunspot, New Mexico, USA, May-12.
• A generalised flux function for 3D reconnection, RAS National Astronomy Meeting 2012, Manchester, Mar-12.
• Flux rope eruptions over a solar cycle, RAS Discussion Meeting: A Comparison of Solar Eruption Models from Local and Global Perspectives, London, Jan-12.

2011

• Magnetic braids, Numerical Analysis Seminar, Durham, Oct-11.
• Magnetic braids, Braids and Applications workshop, CRM, Pisa, Italy, June-11.