Pacific Waves Threaten Oregon Coast: Sea Levels to Rise

Underwater Kelvin waves are traveling across the Pacific Ocean, poised to affect the Oregon and Washington coastlines with temporarily higher sea levels and warmer ocean temperatures. These waves, closely associated with the developing El Niño, form in the western Pacific and move eastward, eventually reaching the North American coast.

These phenomena can elevate sea levels by six to 12 inches, a rise that, when combined with high tides and winter storms, could exacerbate coastal flooding and erosion. Experts note this could also increase landslide risks, particularly concerning as the Pacific Northwest enters its storm season.

Beyond coastal impacts, Kelvin waves warm ocean waters and limit the upwelling of nutrient-rich currents vital for marine ecosystems. Past El Niño periods have seen similar conditions lead to significant delays and closures in crucial fishing seasons, causing economic hardship for coastal communities.