# Indian and Pacific Ocean climate decoupling

> Live situation record from CLSTR: https://clstr.news/situations/indian-and-pacific-ocean-climate-decoupling
> Updated: 2026-09-05T19:21:06.000Z. Sources: 4. Developments: 2.

Research published in Nature Communications indicates an unprecedented breakdown in the climate coupling between the Indian and Pacific Oceans. Historically, these basins were largely coupled, though a period of decoupling occurred between 1810 and 1850 due to major tropical volcanic eruptions.

Recent data suggests that modern anthropogenic greenhouse gas emissions are now driving a distinct shift in inter-basin variability. Since the 1950s, the tropical Indian Ocean has warmed by approximately 0.1 degrees Celsius per decade, while the Pacific Walker circulation has strengthened since the 1980s. This divergence has decoupled the two systems, making it increasingly difficult for scientists to use Pacific patterns to predict Indian Ocean climate trends.

## Timeline

### 2026-09-05: Pacific and Indian Oceans show decoupling in climate relationship

A new study reveals that the historical link between Pacific atmospheric circulation and Indian Ocean temperatures is breaking down due to greenhouse gas emissions and shifting circulation patterns.

2 sources. https://clstr.news/cluster/pacific-and-indian-oceans-show-decoupling-in-climate-relationship

### 2026-08-26: WHOI study links volcanic eruptions and climate change to ocean decoupling

A WHOI study reveals that human-caused greenhouse gas emissions are driving an unprecedented decoupling of climate variability between the Indian and Pacific Oceans, distinct from historical volcanic impacts.

2 sources. https://clstr.news/cluster/whoi-study-links-volcanic-eruptions-and-climate-change-to-ocean-decoupling

---
Cite as: Indian and Pacific Ocean climate decoupling. CLSTR, https://clstr.news/situations/indian-and-pacific-ocean-climate-decoupling