Pacific Ocean Currents Are Accelerating, and It Could Change Global Climate As We Know It

Pacific Ocean Earth — A new study reveals a 30-year acceleration of equatorial Pacific currents, driven by stronger winds, with implications for global climate and El Niño patterns. The findings, based on NOAA-supported data, may enhance climate model accuracy and ENSO predictions.

A crucial ocean layer essential to the dynamics of the El Niño–Southern Oscillation (ENSO).

A recent study published in the Journal of Geophysical Research: Oceans reports a marked acceleration in upper-ocean circulation within the equatorial Pacific over the last three decades.

The primary driver of this acceleration is intensified atmospheric winds, resulting in stronger and shallower ocean currents. These changes may influence regional and global climate patterns, potentially affecting the frequency and intensity of El Niño and La Niña events. The study offers a spatial perspective on these long-term trends based on observational data, extending insights by at least another decade beyond previous research.

West East Near Surface Current Trend Between 1993–2022 — West-east near-surface current trend between 1993-2022. Blue colors show increased westward currents; red colors show increased eastward currents. The largest trends are observed in the central tropical Pacific Ocean (black box). Current velocity data from three equatorial moored buoys (yellow diamonds) provide a subsurface view on long-term upper-ocean current velocity trends. Credit: Graphic figure: Franz Philip Tuchen Satellite image background NOAA NESDIS

The research team, led by Franz Philip Tuchen, a postdoctoral scientist at the University of Miami Rosenstiel School’s DOI: 10.1029/2024JC021343

Funding for this study was provided by NOAA’s Global Ocean Monitoring and Observing (GOMO) programs, including the Global Tropical Moored Buoy Array (GTMBA), the Global Drifter Program (GDP), and the Tropical Atmosphere Ocean (TAO) program.