Appel à communications: Goldschmidt 2026
- rqes
- il y a 6 jours
- 3 min de lecture
Découvrez les différentes sessions organisées par certains de nos membres chercheurs et soumettez votre résumé avant le 26 février 2026!
10c - Tracers and models to assess the dynamics of water and fluid systems
Description
Water derived from both surface and subsurface reservoirs constitutes the primary source of freshwater for billions of people and underpins the functioning of most terrestrial and aquatic ecosystems. Accordingly, elucidating the origin, pathways, and fluxes of water is essential for safeguarding these resources against contamination and overexploitation. To investigate water movement and transformation processes, a suite of geochemical tracers - including gaseous, ionic, and particulate species - combined with isotopic analyses are used. These methods approaches are fundamental for characterizing the dynamics of natural waters such as rivers, lakes, oceans, and groundwater systems. Moreover, they facilitate the identification and quantification of physical, chemical, and biological processes that critically influence water quality, availability, and ecological integrity.
To advance the integration between empirical observations and quantitative assessments, we invite contributions presenting novel methodological developments in tracer analytics, including but not limited to the determination of 39Ar and 81Kr, continuous gas monitoring techniques, and membrane-based analytical systems. We also welcome studies employing established tracer approaches to develop or refine numerical models that simulate the evolution of water and other geofluids across spatial and temporal scales.
Furthermore, we particularly encourage submissions that demonstrate innovative model applications incorporating environmental tracer data to improve predictive capabilities regarding water and fluid dynamics in terrestrial environments. Case studies illustrating the application of these tools in environmental and geochemical investigations - especially those enhancing data resolution, expanding spatial coverage, or enabling adaptive field strategies - are highly valued.
Conveners
Florent Barbecot (UQAM) et cie.
10j - Contaminant Dynamics in Groundwater and Freshwater Systems: Hydro-Biogeochemical Perspectives and Insights from Compound-Specific Isotope Analysis
Description
Groundwater and freshwater systems are increasingly challenged by both legacy pollution from past land use and emerging contaminants linked to modern agricultural and industrial practices. Nutrient enrichment, pesticides, antibiotics, PFAS, and other contaminants interact with hydro-biogeochemical processes in complex ways, influencing water quality, greenhouse gas fluxes, and ecosystem function. Long residence times and heterogeneous flow paths can mask or delay water quality responses to management actions, while shallow systems such as ponds, riparian wetlands, and hyporheic zones act as dynamic reactors that may transform, store, or release nutrients and contaminants. Better understanding is needed of the coupled physical, chemical, and biological processes that regulate contaminant fate and nutrient cycling across groundwater–surface water interfaces and at the catchment scale. Compound-Specific Isotope Analysis (CSIA) is a powerful tool to provide insights into contaminant sources and transformation mechanisms and has been successfully applied to quantify the degradation extent of legacy contaminants. Method development (e.g., preconcentration techniques, Orbitrap-MS) continues to be proposed for emerging contaminants at environmentally low concentrations, with a strong potential to provide concrete evidence of contaminant dynamics and in-situ transformation in groundwater systems.
We invite contributions that integrate field observations, laboratory experiments, isotopic and geochemical tracers, and reactive transport modeling to assess the occurrence, transformation, and fluxes of nutrients and emerging contaminants. We also welcome submissions including advances and applications of CSIA to improve our understanding of contaminant dynamics in groundwater and freshwater systems.
Conveners
Maria Prieto-Espinoza (Polytechnique Montréal), Violaine Ponsin (UQAM et cie.
11d : Inorganic Contaminants in Populated Environments: Geochemical tracing and mitigation strategies
As populations expand and develop, protecting public health requires an integrated understanding of geochemical processes, contaminant sources, and human exposures. This session brings together researchers working across drinking-water systems, urban landscapes, and contaminant-impacted environments to explore how elemental behavior and isotopic fingerprints illuminate pathways of contamination, transformation, transport, and mitigation, and their implications for public health.
We invite studies that investigate geochemical processes controlling the occurrence, mobility, and fate of metal contaminants in water (e.g., groundwater/well water, surface water, water systems), soils, air, and urban settings. Contributions can highlight natural and anthropogenic metal contaminants and/or the application of traditional and emerging metal isotope systems (e.g., Pb, Sr, Nd; Zn, Cu, Fe, Li, Cd, Hg) to trace contaminant sources and quantify biogeochemical processes. We are particularly interested in novel applications of isotopic tools and other advanced analytical approaches to advance understanding of urban geochemistry and its links to environmental and human health.
We welcome abstracts spanning fundamental process studies, analytical and methodological innovations, and applied research connecting geochemistry to exposure, health outcomes, and policy in urban contexts.
Conveners
Debra Hausladen (U de Sherbrooke) et cie.