Tropical wetlands provide ecosystem services worth billions of dollars annually through flood regulation, water purification, carbon storage, fisheries, and biodiversity support, while also emitting globally significant amounts of methane. Significant uncertainties remain in our understanding of the processes linking catchment-scale hydrodynamics, seasonal inundation, wetland vegetation, biogeochemistry, and atmospheric greenhouse gas fluxes across tropical wetland landscapes.

These uncertainties limit our ability to predict how a warmer and wetter climate may alter tropical wetland methane emissions. Improving process-level understanding of this coupled hydrological-ecological-biogeochemical system is essential for constraining a potentially important, yet poorly characterised, wetland-climate feedback in the Earth system.

We welcome contributions spanning field observations, laboratory experiments, remote sensing, data assimilation, modelling, and theory. Topics include wetland hydrology and inundation dynamics; vegetation structure, function, and environmental responses; methane production, oxidation, transport, and emissions; carbon cycling; land-atmosphere interactions; and the impacts of climate variability, extremes, and land-use change.

We particularly encourage interdisciplinary studies that link processes across scales, from microbial and plant dynamics to regional and global assessments. Contributions that improve the representation of tropical wetlands in Earth system models, develop novel observational capabilities, or integrate in situ, airborne, and satellite datasets are especially encouraged.