Scientists identify cause of Antarctic sea ice shrinkage since 2016 using deep-diving robots
Updated
Updated · Livescience.com · Apr 26
Scientists identify cause of Antarctic sea ice shrinkage since 2016 using deep-diving robots
8 articles · Updated · Livescience.com · Apr 26
Researchers, led by Stanford's Earle Wilson, used Argo floats to trace the decline to intensified winds and deep ocean heat release around Antarctica.
The study reveals that shifting winds since 2016 churned up warmer, saltier waters, rapidly melting sea ice and threatening the stability of Antarctic ice shelves.
Scientists warn that continued sea ice loss could accelerate global sea level rise and call for expanded international monitoring to better predict future changes in the Antarctic region.
Could the Antarctic sea ice ever recover to its pre-2016 levels?
Has Antarctica's climate passed a tipping point into a new, warmer state?
Can we predict the next 'violent release' of ocean heat near the poles?
How soon could accelerated Antarctic melt threaten major coastal cities worldwide?
Will melting ice turn Antarctica into a new frontier for global conflict?
What are deep-diving ocean robots revealing about our planet's future?
The 2016 Antarctic Sea Ice Collapse: Causes, Consequences, and Future Risks
Overview
Before 2016, increased precipitation freshened the Antarctic surface ocean, creating a stable freshwater layer that trapped warm deep water and allowed sea ice to expand. Between 2014 and 2016, intensified and southward-shifted winds nearly tripled Ekman upwelling, disrupting this stratification and releasing accumulated subsurface heat. This heat surged upward, causing massive sea ice melting from 2016 onward, leading to record-low ice extents by 2022-2025. The loss of sea ice exposed ice shelves to warm water, accelerating their thinning and glacier discharge, which contributed to rising global sea levels. Additionally, freshwater influx disrupted ocean circulation and marine ecosystems, while regional warming and increased stratospheric warming events altered global climate patterns, highlighting Antarctica's critical role in Earth's climate system.