Tuwhiri at the EGU General Assembly in Vienna

8 May 2026·
Florian Sedlmeir
Florian Sedlmeir
Hannah E. Kessenich
Hannah E. Kessenich
· 1 min read
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Florian Sedlmeir and Hannah Kessenich presented Tuwhiri’s work at the European Geosciences Union General Assembly, held in Vienna from 3 to 8 May 2026.

Florian presented Millimeter-Wave Atmospheric Radiometry via Nonlinear Optical Upconversion, the instrument side of the programme — how a whispering-gallery-mode resonator converts faint atmospheric signal into optical light that ordinary photonics can measure.

Hannah presented A novel diagnostic metric for quantifying Antarctic ozone hole dynamics, which addresses the other end of the problem: what you do with the measurements once you have them, and how to describe the behaviour of the ozone hole in terms that a forecasting model can use.

The EGU General Assembly is the largest geosciences meeting in Europe, drawing around 20,000 researchers across the Earth, planetary and space sciences. For a programme that sits between instrument development and atmospheric science, it is a useful place to be heard by both communities at once — and to test whether the case for a low-cost limb sounder lands with the people who would use the data.

Florian Sedlmeir
Authors
Expert — Resonator Physics
Florian Sedlmeir is a Research Fellow and Marie Skłodowska-Curie Fellow at the University of Otago. His research focuses on high-Q whispering-gallery-mode resonators, nonlinear optics, and the conversion of microwave and terahertz signals to the optical domain. He completed his PhD at Friedrich-Alexander University Erlangen-Nürnberg, carrying out his research at the Max Planck Institute for the Science of Light, and subsequently worked in both academic research and industry before returning to the University of Otago in 2022. His current work explores electro-optic frequency conversion for low-noise millimetre-wave and terahertz detection, as well as microwave-to-optical interfaces for quantum technologies.
Hannah E. Kessenich
Authors
Lead Atmospheric Modeller