Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 44, Issue 4, Pages 1839-1847Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL071020
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Funding
- National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS)
- U.S. Geological Survey
- NOAA Coastal and Ocean Climate Applications (COCA) program [NA120AR4310195]
- NOAA Regional Integrated Sciences and Assessments Program (RISA) [NA150AR4310145]
- Strategic Environmental Research and Development Program (SERDP) [RC -2644]
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To better understand how individual processes combine to cause flooding and erosion events, we investigate the relative contribution of tides, waves, and nontidal residuals to extreme total water levels (TWLs) at the shoreline of U.S. West Coast sandy beaches. Extreme TWLs, defined as the observed annual maximum event and the simulated 100 year return level event, peak in Washington, and are on average larger in Washington and Oregon than in California. The relative contribution of wave-induced and still water levels (SWL) to the 100 year TWL event is similar to that of the annual maximum event; however, the contribution of storm surge to the SWL doubles across events. Understanding the regional variability of TWLs will lead to a better understanding of how sea level rise, changes in storminess, and possible changes in the frequency of major El Nioos may impact future coastal flooding and erosion along the U.S. West Coast and elsewhere.
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