Benoit Pasquier - Introducing AIBECS.jl, a Julia package for creating global marine biogeochemistry models

Event type: 
Seminar
Date: 
7 August 2019
Time: 
2.00 - 3.00pm
Location: 

Climate Change Research Centre, Seminar Room, Mathews Building 4th floor, UNSW, Sydney

Presenter: 
Dr. Benoit Pasquier
University of California Irvine, US
Host: 
Climate Change Research Centre

Running standard global marine biogeochemistry models comes with large computational costs and with a steep learning curve. The recently developed AWESOME OCIM (for A Working Environment for Simulating Ocean Movement and Elemental cycling in an Ocean Circulation Inverse Model) is an attractive alternative because it offers better user experience thanks to a MATLAB Graphical User Interface (GUI), and faster computations thanks to the OCIM's steady-state matrix formulation of the ocean circulation. Benoît will introduce and give a live demonstration of the AIBECS (for Algebraic Implicit Biogeochemical Elemental Cycling System), an open-source, user-friendly, fast, and modular Julia package, which aims to provide a solution to the limitations of the AWESOME OCIM. The AIBECS provides an Application Programming Interface (API) to generate global steady-state marine biogeochemistry models in just a few lines of code. Under the hood, the AIBECS comes with state-of-the-art nonlinear-system solvers, auto-differentiation algorithms, and was designed with parameter optimization/estimation and uncertainty analysis in mind. The AIBECS allows researchers to focus on the science rather than spending time reinventing the wheel for differentiating convoluted systems, for solving nonlinear problems, or for leveraging cryptic linear-algebra shortcuts. Because of its ease of use, the AIBECS is ideal for teaching and exploratory research. The AIBECS is also ideal for cutting-edge research owing to its open-source design, its modularity, its advanced algorithms, and its novel-diagnostic capabilities.

 

 

Brief biography: Benoît Pasquier is a postdoctoral researcher at the Department of Earth System Science, University of California, Irvine, working on global marine biogeochemistry models with Prof. J. Keith Moore and Prof. François Primeau. Benoît is an alumnus of UNSW, with a MSc in Environmental Science obtained in 2010 and a PhD in Applied Mathematics obtained in 2017 under the supervision of Prof. Mark Holzer. Prior to returning to academia for his PhD, Benoît has worked as a water-treatment engineer for Suez-Environment and as a FOREX-trader assistant for Société Générale Investment Banking. Benoît also holds a MSc in Engineering from École Polytechnique and a MSc in Finance Mathematics from Paris-Dauphine University and ENSAE ParisTech.