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Seminar detailed information:
Topic: Data synthesis, modelling & integration
Time: April 28 @ 15:00 CEST
Moderator: Dr. Anh Pham (University of California, Los Angeles)
Senior Scientist: Dr. Gregory De Souza (ETH Zurich, Switzerland)
Title: Bringing it all together: using models to build process understanding
Abstract: Two decades of GEOTRACES observations provide us with a wealth of TEI data at a range of spatial scales. Inferring controlling processes from these data requires an understanding of how sources and sinks — whether in the open ocean or at its margins — interact with ocean circulation to produce observed distributions of dissolved species. In this talk, I will give an overview of the diversity of approaches that have used conceptual and/or numerical models to synthesize observational data into an understanding of TEI cycling in the sea and at its interfaces.
Early Career Scientist: Dr. Arianna Olivelli (Flanders Marine Institute, Belgium)
Title: Mapping ocean trace metal distributions: A global data-driven view of lead and its isotopes
Abstract: Despite the rapid growth of GEOTRACES observations, resolving large-scale distributions of trace metals remains challenging due to their sparse and heterogeneous coverage. In recent years, machine learning (ML) techniques have offered new opportunities to advance data-driven oceanographic research at global and regional scales. In this talk, I will present my work to develop the first global maps of lead (Pb) concentrations and isotope compositions from surface to depth using the tree-ensemble algorithm XGBoost and explainable ML tools. These maps provide an observation-based view of Pb distributions and variability that is difficult to achieve from measurements alone. I will discuss key methodological choices, lessons learned, and potential future applications of these maps. Additionally, I will explore the use of different ML approaches for the synthesis and integration of in situ observations within the wider GEOTRACES context.
For more information and updates, check the seminar web page.
You can also download the flyer here. |
