Compounding of Sea-Level Processes During High-Tide Flooding Along the U.S. Coastline

Sida Li, Thomas Wahl*, Christopher Piecuch, Sönke Dangendorf, Philip Thompson, Alejandra Enríquez, Lintao Liu*

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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Abstract

High-tide flooding (HTF) is usually generated by a variety of different processes acting at different temporal scales across different geographic regions, but little is known about the role of interactions between those. We assess the role of compounding effects arising from cross-covariances between different sea-level components in generating HTF events along the US coastline. Our results show that compounding effects contribute to both HTF frequencies and magnitudes. The US Gulf and northwest coasts exhibit particularly high potential for compound HTF. Long-term sea-level rise is the main driver of accelerated HTF frequencies along the US coastline. However, even in the absence of sea-level rise, changes in compounding effects due to increased or decreased cross-covariances between sea-level components associated with climate variability and change also modulate compound HTF. Our results highlight the importance of adequately modeling compounding effects between sea-level components when generating future projections of HTF.

Original languageEnglish
Article numbere2023JC019885
Pages (from-to)1-14
Number of pages14
JournalJournal of Geophysical Research: Oceans
Volume128
Issue number8
Early online date6 Aug 2023
DOIs
Publication statusPublished - Aug 2023

Bibliographical note

Funding Information:
This work was supported by NASA's Sea Level Change Team award number 80NSSC20K1241. S.L. also acknowledges support by China National Science Foundation (42074011), Hubei Province (R22R6301) and Foundation from State Key Laboratory of Geodesy and Earth’s Dynamics (S22L6101). S.D. also acknowledges David and Jane Flowerree for their support.

Publisher Copyright:
© 2023. American Geophysical Union. All Rights Reserved.

Funding

This work was supported by NASA's Sea Level Change Team award number 80NSSC20K1241. S.L. also acknowledges support by China National Science Foundation (42074011), Hubei Province (R22R6301) and Foundation from State Key Laboratory of Geodesy and Earth’s Dynamics (S22L6101). S.D. also acknowledges David and Jane Flowerree for their support.

Keywords

  • compounding effects
  • high-tide flooding
  • sea level components

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