17–18 Mar 2026
Musées Royaux des Beaux-Arts de Belgique
Europe/Brussels timezone

Delivering Usable Climate Information for Better Decisions: Bias Correction and Interactive Selection of Representative Climate Projections for Belgium

17 Mar 2026, 16:15
15m
Oral presentation Effective climate services for better decisions Effective climate services for better decisions

Speaker

Dr Sylvain Marchi (RMI)

Description

There is a growing need for stakeholders to access relevant and user-friendly climate information to develop action plans addressing climate change challenges across various sectors. The occurrence of future climate events is often presented in a probabilistic context, where multiple projections are produced to represent the uncertainties inherent in climate modeling. However, the practical use of these projections is limited by (1) systematic biases in climate models—despite continuous improvements in their skill—and (2) the large number of available simulations, which complicates effective decision-making.
Indicators based on absolute thresholds are particularly sensitive to such biases, which can strongly distort analyses. To address this, we present a bias-corrected ensemble of simulations generated using statistical correction methods and the CLIMATE GRID, an observational dataset developed by the Royal Meteorological Institute of Belgium (RMI) to accurately represent conditions across Belgium.
Even with a bias-corrected ensemble, potential users often struggle to identify which scenarios and models to prioritize. To tackle this issue, we are developing an interactive, collaborative method that helps users select a representative subset of climate simulations from large ensembles. Inspired by a service developed by MeteoSwiss, this approach identifies specific low-, medium-, and high-impact scenarios, providing plausible statistical outcomes for selected climate indices, emission scenarios, and regions. An example focusing on temperature-related indices will be presented to illustrate how users can efficiently handle large ensembles by selecting a manageable, representative subset of climate projections for further analysis.

If your abstract is not accepted for an oral presentation, would you be interested in presenting it as a poster instead? Yes
If accepted by the Scientific Board, I agree to have my presentation/poster and abstract published on the Belgian Climate Centre websites and social media. Yes

Primary author

Dr Sylvain Marchi (RMI)

Co-author

Mr Kobe Vandelanotte (Royal meteorological institute of Belgium)

Presentation materials