M. Rakhi New York: A massive underground marine heatwave stretching across approximately 14,500 kilometers has been detected moving eastward...
M. Rakhi
New York: A massive underground marine heatwave stretching across approximately 14,500 kilometers has been detected moving eastward through the Pacific Ocean. The discovery was made by NASA’s Sentinel-6 Michael Freilich satellite.
This slow-moving subsurface phenomenon has caused the sea surface to bulge upward by about 15 centimeters. Following this significant shift in ocean dynamics, the U.S. weather agency—the National Oceanic and Atmospheric Administration (NOAA)—officially declared the onset of an El Niño event.
Invisible to Sailors, Tracked from Space
What makes this heatwave extraordinary is its stealth. While completely invisible to ships and sailors on the water, it was easily captured by the NASA satellite orbiting at an altitude of 1,300 kilometers.
January: A minor wave briefly surfaced near Micronesia before fading away.
March: A much larger wave took shape.
May: By mid-May, this massive wave had pushed sea levels around Peru to more than 15 centimeters above the long-term historical average.
The Science: Kelvin Waves, Thermoclines, and El Niño
The birth of an El Niño is a chain reaction triggered by shifting winds and changing ocean layers:
The Kelvin Wave
Normally, trade winds blow from east to west across the Pacific, pushing warm water toward Asia. When these winds weaken, a massive reservoir of warm water near Indonesia sloshes back toward the coast of Peru in South America. This slow, hundreds-of-kilometers-wide underwater current is known as a Kelvin Wave. Because warm water expands, it causes the sea level above it to rise.
Disrupting the "Upwelling"
Under normal conditions, a process called upwelling occurs off the coast of Peru, drawing nutrient-rich, cold water from the deep ocean to the surface. However, the arriving Kelvin wave pushes down the thermocline—the boundary layer separating warm surface water from the cold deep sea. This effectively blocks the cold water from rising.
The Birth of El Niño
With upwelling suppressed, the eastern Pacific experiences intense warming. This disruption alters global atmospheric patterns, birthing the climate phenomenon we call El Niño.
Centuries ago, South American fishermen noticed this seasonal warming peaking around December. They named it El Niño—Spanish for "The Boy Child"—in reference to the Christ Child at Christmas.
Will 2026 See a 'Super El Niño'?
Climate models indicate that this phenomenon will intensify, reaching its peak by the upcoming winter.
There is currently a 63% probability that Pacific ocean temperatures will surge more than 2°C above baseline averages. If this threshold is crossed, the world could witness a devastating "Super El Niño" on par with the extreme climate events of 1997 and 2015.
The Impact on India
However, meteorologists note a silver lining: a positive Indian Ocean Dipole (IOD)—often called the Indian Nino—could develop. If the IOD brings favorable temperature variations to the Indian Ocean, it may counteract and mitigate El Niño's negative impact on India's rainfall.
COMMENTS