# Kristian Strommen

# Kristian Strommen

Postdoctoral Research Assistant

I currently hold a fully funded Junior Research Fellowship at Jesus College to carry out work in climate modelling. In particular, my goal is to develop and evaluate the impact of novel stochastic schemes in climate models, with the final goal of obtaining a well calibrated 'Probabilistic Earth-system Model': a climate model with stochasticity in all its major components.

Prior to this, I worked as a postdoctoral research assistant between 2016-2020 on the PRIMAVERA project. PRIMAVERA is a European Union Horizon 2020 project which aims to develop a new generation of advanced and well-evaluated high-resolution global climate models. My work was based on examining the extent to which stochastic schemes could simulate the improvements associated with increased resolution.

My Jesus College profile can be found here.

I am not currently teaching. My last teaching post was a stipendiary lectureship at Pembroke College between 2014 and 2016, where I taught 1st and 2nd year pure mathematics.

I am particularly interested in the following:

- The impact of stochastic physics on a climate models mean state and climate sensitivity
- The impact of stochastic physics on large-scale dynamical phenomena such as North-Atlantic regimes, ENSO and monsoons.
- Challenges in seasonal predictability: particularly the signal-to-noise paradox of winter NAO predictions.
- Understanding and diagnosing North Atlantic regime structure.
- Using novel mathematical techniques such as persistent homology to shed light on the geometry of the climate attractor.

Prior to my work in climate science, I completed my DPhil in Pure Mathematics at Oxford University. My thesis was titled "Galois Groups and Anabelian Reconstruction" and fell broadly under the umbrellas of number theory and model theory, or anabelian geometry and valued fields to be more precise.