Comparative Hydro-Climatic Datasets For Catchment-Wise Linked Water Fluxes And Storage Changes Across South America
--
https://doi.org/10.3389/fenvs.2026.1764771 <-- shared paper
--
https://doi.org/10.1038/s43247-026-03661-2 <-- shared paper
--
https://doi.org/10.1002/joc.6443 <-- shared paper
--
https://www.pik-potsdam.de/en/news/latest-news/from-droughts-to-floods-climate-change-and-migration-in-peru | https://publications.iom.int/books/evaluacion-de-la-evidencia-cambio-climatico-y-migracion-en-el-peru <-- shared 2021 Peru hydroclimate technical article | report
--
^^^^ shared overview video
--
H/T @Julio Montenegro Gambini
“📊 The study introduces the South America Hydro-Climatic Data (SAHCD) synthesis: an open, harmonized, and catchment-resolved resource covering 95 major hydrological catchments and approximately 10.6 million km², nearly two-thirds of South America’s land area.
📋 These datasets integrate key water-cycle variables, including precipitation, evapotranspiration, runoff, soil moisture, temperature, and water-storage change. Their harmonized structure enables the assessment of catchment-scale water-balance closure, physical consistency, and agreement or divergence among observational, model-based, and reanalysis products.
📊 This resource can support:
✅ Hydro-climatic variability and extremes analysis
✅ Drought and flood-risk assessment
✅ Quantification of dataset and water-balance uncertainties
✅ Hydrological and Earth-system model evaluation
✅ Climate-impact and water-security studies
✅ Evidence-based adaptation and water-resources planning…”
--
“The complexity of water fluxes and storage changes, and of the water balance closure they imply across different scales, is further enhanced by climate change. Shifting precipitation patterns along with the rising temperatures, and changed frequencies and intensities of heatwaves, floods, and droughts imply altered hydro-climatic conditions in ways that heighten water security uncertainty, expose vulnerabilities in water systems, and complicate water-related risk management. Assessments of water security, based on water availability from surface and sub-surface water bodies, are also subject to large uncertainties due to lacking observational data for critical water fluxes, such as runoff... In addition, spatial heterogeneity across scales… and fragmentation of knowledge, research, and management of the terrestrial water and its various components, aspects, and roles in the Earth System… amplify water security and resilience challenges. The changes in water conditions and uncertainties about them make it difficult, for example, for planners and policymakers, to decide on and develop reliable and sustainable long-term strategies for managing water resources and water-related risks (e.g., floods, droughts, water pollution) under ongoing and future climatic change.
Reliable hydrological data forms a fundamental structure of our ability to track, interpret, and anticipate climate-driven changes in water systems. Such data come from an increasingly diverse mix of data streams, including ground observations, satellite missions, reanalysis products, and land-surface and climate model outputs that provide various data for water conditions across the atmosphere, land, and oceans. Despite the advances in data availability, large parts of the world still suffer from incomplete, inconsistent, or short-term observational records, limiting our capacity to capture hydro-climatic variability with confidence. A persistent complication is that different datasets might provide inconsistent representations of key hydrological variables, raising questions about which products are most credible for regional assessments, and why the discrepancies occur, how large they are, and what they imply for hydrological interpretation… Choices of which water data to use also depend on different disciplinary traditions, methodological constraints, and particular study interests... Over the past decade, recognition of divergent dataset implications has intensified calls for comparative evaluation frameworks that systematically test the consistency of available datasets... Such efforts are crucial not only for scientific progress but also for informing water-related practices, where robust and transparent water system assessments are essential for preparing societies to navigate toward secure and resilient water availability under hydro-climatic uncertainty…”
--
#water #GIS #spatial #mappping #spatialanalysis #spatiotemporal #remotesensing #earthobservation #Hydrology #Hydroclimatology #ClimateChange #extremeweather #WaterResources #WaterSecurity uncertainity #SouthAmerica #ClimateData #PeerReview #OpenScience #Hydrometeorology #opendata #datasets #rainfall #precipitation #fluvial #heatwave #temperature #changing #consistency #flood #flooding #drought #riskmanagement #risk #hazard #earthsystems #resilience #waterquality #waterpollution #model #modeling #monitoring #records #hydroclimate #hydrogeomorphology #review #SouthAmerica #planning #policy #sustainability #evapotranspiration #runoff #waterstorage #SAHCD