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Portrait Photo of Thomas Monahan

Thomas Monahan DPhil

Dr

Senior Research Associate

Schmidt AI In Science Fellow

Biography

Thomas is a Schmidt AI in Science fellow and Senior Research Associated in the Department of Engineering Science. He lectures on information engineering, fluid mechanics, and natural hazards. He joined New College as the W.W Spooner Junior Research Fellow in 2025. He graduated from Bates College with a degree in Physics and Mathematics in 2022. He joined the Environmental Fluid Mechanics and Machine Learning research groups at the University of Oxford in 2022, funded by the Department of Engineering, and completed his DPhil in 2025. For his DPhil work, he won the Osborne Reynolds prize for the best UK doctorate in fluid mechanics and went on to win the Da Vinci prize for the best European doctorate in fluid mechanics. 

He leads the Agile Sprint research project on improving flood resilience in the Thames Estuary. This work looks to operationalize his scientific machine learning approach to flood forecasting, RTide, for use by the UK government.

Research Interests

Thomas' primary research is on oceanic forecasting, specifically in the prediction of coastal flooding events. His work develops scientific machine learning methods for studying and predicting sea-levels, with an emphasis on understanding how ML can actually enable richer physical insights to be discovered. You can read more about this work here.

He also is interested in Bayesian machine learning, particularly using variational Bayes and neural methods such as neural processes to characterize the complex uncertainties in real-world systems. Thomas works closely with the UK and Dutch governments to help produce their operational surge forecasts and is also a member of the several international scientific teams studying sea-levels.

Personal Website

Current Projects

Variational Bayesian Harmonic Analysis: Developing a framework for tidal and mean sea surface corrections from and for the Surface Water Ocean Topography mission using a spatially coherent variational Bayesian harmonic analysis (under review JGR: Oceans).

Response Framework: Tidal analysis and prediction through physics-informed ML: A new non-parametric framework for analysis of complex tidal phenomena under external forcing such as storm surge, tidal rivers, and interactions with mean-sea-level.

(under review: ProcRSoc A) Tidal analysis from shortened records: Theoretical analysis of "super-resolution" using newly developed harmonic and Response methods.

Spatial characteristics of nonlinear coastal and estuarine tides from the Surface Water Ocean Topography mission: Leveraging new wide-swath satellite altimetry along with new empirical analysis techniques to study nonlinear characteristics of ocean tides in coastal regions.

(In progress) AutoSSA:A fully non-parametric singular spectrum analysis tool for intelligent signal decomposition and denoising (In progress) 

Open Source Code: rtide: Python implementation of the "Response Framework" vtide: Python implementation of the variational Bayesian harmonic analysis

Publications

Prediction of tidal currents in the Inner Sound of the Pentland Firth using RTide

Monahan T, Tang T, Roberts S & Adcock T (2025), Proceedings of the European Wave and Tidal Energy Conference 2025, 16

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BibTeX View PDF
@inproceedings{predictionoftid-2025/9,
  title={Prediction of tidal currents in the Inner Sound of the Pentland Firth using RTide},
  author={Monahan T, Tang T, Roberts S & Adcock T},
  booktitle={16th European Wave and Tidal Energy Conference (EWTEC 2025)},
  year = "2025"
}

RTide: a machine learning enabled implementation of Munk andCartwright’s response method

Monahan T, Tang T, Roberts S & Adcock T (2025), Proceedings of PRIMaRE 2025, 4

Altmetric score is
BibTeX
@inproceedings{rtideamachinele-2025/7,
  title={RTide: a machine learning enabled implementation of Munk andCartwright’s response method},
  author={Monahan T, Tang T, Roberts S & Adcock T},
  booktitle={12th PRIMaRE conference 2025},
  pages={4},
  year = "2025"
}

Tidal corrections from and for SWOT using a spatially coherent variational Bayesian harmonic analysis

Monahan T, Tang T, Roberts S & Adcock T (2025), Journal of Geophysical Research: Oceans, 130(3)

Altmetric score is
BibTeX View PDF
@article{tidalcorrection-2025/3,
  title={Tidal corrections from and for SWOT using a spatially coherent variational Bayesian harmonic analysis},
  author={Monahan T, Tang T, Roberts S & Adcock T},
  journal={Journal of Geophysical Research: Oceans},
  volume={130},
  number={e2024JC021533},
  publisher={American Geophysical Union},
  year = "2025"
}

First observations of the seiche that shook the world

Monahan T, Tang T, Roberts S & Adcock TAA (2024)

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BibTeX View PDF
@misc{firstobservatio-2024/11,
  title={First observations of the seiche that shook the world},
  author={Monahan T, Tang T, Roberts S & Adcock TAA},
  year = "2024"
}

A hybrid model for online short-term tidal energy forecasting

Monahan T, Tang T & Adcock TAA (2023), Applied Ocean Research, 137

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BibTeX View PDF
@article{ahybridmodelfor-2023/5,
  title={A hybrid model for online short-term tidal energy forecasting},
  author={Monahan T, Tang T & Adcock TAA},
  journal={Applied Ocean Research},
  volume={137},
  number={103596},
  publisher={Elsevier},
  year = "2023"
}

Enhancing Tidal Energy Forecasting Using Hybrid Online Machine Learning

Monahan T, Tang T & Adcock TAA (0)

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BibTeX View PDF
@misc{enhancingtidale-/,
  title={Enhancing Tidal Energy Forecasting Using Hybrid Online Machine Learning},
  author={Monahan T, Tang T & Adcock TAA}
}

A framework for early-stage coastal and estuarine tidal and mean sea surface correction from the Surface Water Ocean Topography mission

Monahan T, Tang T, Roberts S & Adcock T (0)

Altmetric score is
BibTeX View PDF
@misc{aframeworkforea-/,
  title={A framework for early-stage coastal and estuarine tidal and mean sea surface correction from the Surface Water Ocean Topography mission},
  author={Monahan T, Tang T, Roberts S & Adcock T}
}

Response Framework: Tidal analysis and prediction through physics-informed ML

Monahan T, Tang T, Roberts S & Adcock T (0)

Altmetric score is
BibTeX View PDF
@misc{responseframewo-/,
  title={Response Framework: Tidal analysis and prediction through physics-informed ML},
  author={Monahan T, Tang T, Roberts S & Adcock T}
}

Response Framework: Tidal analysis and prediction through physics-informed ML

Monahan T, Tang T, Roberts S & Adcock T (0)

Altmetric score is
BibTeX View PDF
@misc{responseframewo-/,
  title={Response Framework: Tidal analysis and prediction through physics-informed ML},
  author={Monahan T, Tang T, Roberts S & Adcock T}
}

RTide: Automating the tidal response method

Monahan T, Tang T, Roberts S & Adcock T (0), Journal of Geophysical Research (JGR): Machine Learning

Altmetric score is
BibTeX
@article{rtideautomating-/,
  title={RTide: Automating the tidal response method},
  author={Monahan T, Tang T, Roberts S & Adcock T},
  journal={Journal of Geophysical Research (JGR): Machine Learning}
}
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