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| Type: | Resource | |
| Storage: | The size of this resource is 3.8 GB | |
| Created: | Apr 17, 2024 at 2:25 p.m. (UTC) | |
| Last updated: | May 07, 2025 at 2:50 p.m. (UTC) | |
| Published date: | May 07, 2025 at 2:50 p.m. (UTC) | |
| DOI: | 10.4211/hs.0871c3b8775d4153a024f532be34ecd9 | |
| Citation: | See how to cite this resource | |
| Content types: | CSV Content |
| Sharing Status: | Published |
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| Views: | 2552 |
| Downloads: | 86 |
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Abstract
This repository contains the data and code used to analyze the impact of antecedent soil moisture conditions on flooding caused by atmospheric rivers for our paper:
Webb, M. J., Albano, C. M., Harpold, A. A., Wagner, D. M., & Wilson, A. M. (2025). Wet Antecedent Soil Moisture Increases Atmospheric River Streamflow Magnitudes Non-Linearly. Journal of Hydrometeorology. https://doi.org/10.1175/JHM-D-24-0078.1
"In this study, we analyze how antecedent soil moisture (ASM) conditions contribute to variability in streamflow during atmospheric river (AR) events and how that changes across climatic regimes and physiography in 122 U.S. West Coast watersheds. We identify a robust non-linear relationship between streamflow and ASM during ARs in 89% of watersheds. The inflection point in this relationship represents a watershed-specific critical ASM threshold, above which event maximum streamflow is, on average, two to four and a half times larger. Wet ASM conditions amplify the hydrologic impacts of more frequent but weaker, lower moisture transport AR events, while dry ASM conditions attenuate the hydrologic impacts that stronger, higher moisture transport AR events could otherwise cause. Our research shows that watersheds prone to ASM-amplified streamflows have higher evaporation ratios, lower cold-season precipitation, lower snow-to-rain ratios, and shallower, clay-rich soils. Higher evaporation and lower precipitation lead to greater ASM variability during the cold season, increasing streamflow during wet periods and buffering streamflow during dry periods. Lower snow fraction and shallower soils limit the antecedent water storage capacity of a watershed, contributing to greater sensitivity of streamflow peaks to ASM variability. Incorporating ASM thresholds into hydrologic models in these regions prone to AR-amplified streamflow could improve forecasts and decrease uncertainty."
Subject Keywords
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Related Resources
| This resource is referenced by | Webb, M. J., Albano, C. M., Harpold, A. A., Wagner, D. M., & Wilson, A. M. (2025). Wet Antecedent Soil Moisture Increases Atmospheric River Streamflow Magnitudes Non-Linearly. Journal of Hydrometeorology. https://doi.org/10.1175/JHM-D-24-0078.1 |
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| U.S. National Science Foundation | Graduate Research Fellowship Program (GRFP) | Grant No. 1937966 |
| National Aeronautics and Space Administration | Nevada Space Grant Consortium | Cooperative Agreement No. 80NSSC20M0043 |
| U.S. Army Corp of Engineers | Engineer Research and Development Center Urban Flood Demonstration Program | Agreement No.W912HZ1920011 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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