edu.ucar.opensky::articles:23868 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T06:42:47.815043 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7nc64hg Increased flood exposure due to climate change and population growth in the United States 2020-11-01T00:00:00Z publication https://n2t.org/ark:/85065/d7nc64hg https://doi.org/10.1029/2020EF001778 Swain, Daniel L. author Wing, O. E. J. author Bates, P. D. author Done, James M. author Johnson, K. A. author Cameron, D. R. author UCAR/NCAR - Library publisher Precipitation extremes are increasing globally due to anthropogenic climate change. However, there remains uncertainty regarding impacts upon flood occurrence and subsequent population exposure. Here, we quantify changes in population exposure to flood hazard across the contiguous United States. We combine simulations from a climate model large ensemble and a high-resolution hydrodynamic flood model-allowing us to directly assess changes across a wide range of extreme precipitation magnitudes and accumulation timescales. We report a mean increase in the 100-year precipitation event of similar to 20% (magnitude) and >200% (frequency) in a high warming scenario, yielding a similar to 30-127% increase in population exposure. We further find a nonlinear increase for the most intense precipitation events-suggesting accelerating societal impacts from historically rare or unprecedented precipitation events in the 21st century. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation