Joakim Kjellsson

Researcher and scientific programmer

Publications Students Projects About

About

History

2009-2014 PhD student Stockholm University, Sweden
2014-2016 Postdoc British Antarctic Survey, UK
2016-2017 Postdoc University of Oxford, UK
2017-2019 Postdoc GEOMAR, Germany
2019-2024 Jr. Professor for Meteorology GEOMAR & Kiel University, Germany
2024- Researcher & Scientific programmer SMHI, Sweden

Projects

ESiWACE

Towards exascale weather and climate simulations. My role is in the transfer and establishment of knowledge for efficient and scalable climate simulations across Europe. Built a containerised version of the EC-Earth4 model which can be built on one computing system and easily ported to multiple high-performance computers across Europe - notable EuroHPCs such as MareNostrum5 and LUMI.
The project is part of the EU Joint Undertaking (EuroHPC JU) aiming to develop a world-class supercomputing ecosystem in Europe.
Link to project website

OptimESM

Developing the next generation of Earth System Models - with more process realism and higher resolution. My role is in the development of a new version of the EC-Earth model and explore hybrid-resolution approaches to increase model resolution and computer efficiency. Work includes upgrading the atmosphere component in EC-Earth with more realistic processes and to explore the use of a dual-grid configuration for atmosphere/chemistry simulations.
Link to project website

SO-CHIC

Understand and quantify variability of heat and carbon budgets in the Southern Ocean. Investigate key processes controlling exchanges between the atmosphere, ocean and sea ice from observations and climate models. My role was to study the climate effect of polynyas in the Weddell Sea, using idealised simulations with an atmosphere model and with a fully coupled climate model with refined resolution in the Weddell Sea.
Link to project website

ROADMAP

The role of ocean dynamics and ocean-atmosphere interactions in driving climate variations. My role was to study how ocean variability can shape atmospheric extreme events over Europe, for example how the North Atlantic Ocean shapes European summer heat waves.
Link to project website

BalticWay

The potential of currents for environmental management of the Baltic Sea maritime industry. My role was to study the spreading rates of particles in the Baltic Sea using a combination of turbulence theory, observed surface drifters, and particle-tracking models.
Link to project report

Students

Postdocs

PhD students

Master theses

Bachelor theses