The risk of concurrent heatwaves and extreme sea levels along the global coastline is increasing

Mo Zhou, Shuo Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Concurrent heatwaves and extreme sea levels could pose a serious threat to coastal communities under climate change; however, the spatiotemporal characteristics and dynamic evolution of them along global coastline remain poorly understood. Here, we use reanalysis datasets and model projections to assess historical and future changes in global concurrent heatwaves and extreme sea levels. We find that 87.73% of coastlines experienced such concurrent extremes during 1979–2017. There is an average increase of 3.72 days in the occurrence during 1998–2017 compared to 1979–1998. A one-percentile increase in heatwave intensity is associated with a 2.07% increase in the likelihood of concurrent extremes. Global coastlines are projected to experience 38 days of concurrent extremes each year during 2025–2049 under the highest emission scenario. The weakening of geopotential height associated with a surface low-pressure system may serve as an important indicator for the occurrence of extreme sea levels during heatwaves.

Original languageEnglish
Article number144
JournalCommunications Earth and Environment
Volume5
Issue number1
DOIs
Publication statusPublished - Dec 2024

ASJC Scopus subject areas

  • General Environmental Science
  • General Earth and Planetary Sciences

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