Chapter 3: The Leading Theories

Although no single explanation has been confirmed, researchers have identified several possible contributors.

One theory involves changes in equatorial wind patterns. Scientists observed oceanic Kelvin waves—large underwater waves capable of transporting heat across vast distances. An abrupt shift in wind conditions may have generated powerful upwelling waves that brought cooler water toward the surface, rapidly lowering sea temperatures.

Another possibility is that multiple ocean-atmosphere interactions occurred simultaneously. Researchers suggest that unusual combinations of wind anomalies, subsurface ocean dynamics, and natural climate variability may have combined to produce the record-breaking cooling event.

What makes the event especially intriguing is that none of these factors alone appears sufficient to explain the full extent of the cooling.

Some scientists believe there may be additional processes at work that are not yet fully understood. As one researcher explained, there appears to be "something else going on" beyond the mechanisms usually associated with Atlantic cooling.